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K2CO3 on porous supports for moisture-swing CO2 capture from ambient air Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-18 Shiqiang Zheng, Xinyue Cheng, Wenjia Zhou, Tong Wang, Liangliang Zhu, Hang Xiao, Xi Chen
Direct air capture (DAC) of CO2 is an important technology to mitigate mobile carbon emissions, reduce atmospheric CO2 concentration, and cope with climate change. Moisture-swing adsorption is regarded as one of the most promising technologies in DAC due to its low energy consumption and ease of operation. In this work, a cheap and easily available moisture-swing adsorbent of potassium carbonate loaded
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Kinetics of microwave carbothermal reduction of Sb2O3: Isothermal and non‐isothermal microwave thermogravimetric analysis Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-13 Qinsheng Yang, Chenhui Liu, Xiongjin Zhu, Chandrasekhar Srinivasakannan, Yingwei Li, Ying Dai
Kinetics of antimony production via carbothermal reduction of Sb2O3–carbon powder–NaCl mixture using microwave and conventional heating was investigated to identify the dominant controlling mechanism. Results of conventional heating revealed the temperature range of conventional carbothermal reduction reaction is 500°C to 800°C, with the average activation energy of each stage being 81.97 kJ/mol (α
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Microencapsulation of pyriproxyfen using the particles from gas‐saturated solutions process as a controlled‐release system Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-11 Tanjina Sharmin, Hiroyuki Tashiro, Hiroki Sakai, Kouichiro Shibata, Konoka Ema, Keiichi Irie, Tomomitsu Satho, Kenji Mishima
The purpose of this investigation was to determine whether pyriproxyfen (PPF), a synthetic juvenile hormone analog (JHA), could be encapsulated in supercritical carbon dioxide (scCO2) using the process particles from the gas‐saturated solutions (PGSS) for a controlled‐release system. The PGSS process represents a promising two‐step production system especially suited for the encapsulation and controlled‐release
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Motion and interaction of in‐line bubbles in quiescent non‐aqueous solutions of hydrocarbon resin Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-08 Li Mei, Denghan Luo, Zhongyao Zhang, Xiaopeng Chen, Lifang Huang, Jiezhen Liang, Xiaojie Wei, Bei Liu, Linlin Wang
Hydrocarbon resin (HR) is an essential fine chemical. The preparation and application process of HR involves lots of gas–liquid heterogeneous reactions, and the bubbly flow behavior influences them significantly. Using high‐speed photography and digital image processing techniques, the motion and interaction of in‐line bubbles in non‐aqueous solutions of HR are examined in this article. The results
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Flow stirred by open turbine: A modal analysis of multiscale flow characteristics Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-05 Jie Jin, Shaoyang Bu, Ying Fan, Jianjun Han, Kuangdi Yin, Wenyi Chen
The turbulence observed in the stirred tank is a result of the superposition of flows at different scales, each exerting various influences on the operational processes. To understand the flow characteristics associated with stirring, this paper undertakes particle image velocimetry (PIV) experimental research on an unbaffled tank stirred by an open turbine featuring four distinct blade deflection
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Preparation of hollow carbon nanospheres from oxidation of spent tyre oil‐derived carbon black in air Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-04 Chiemeka Onyeka Okoye, Zhezi Zhang, Dongke Zhang
Hollow carbon nanospheres (HCNS) were prepared from carbon black (CB) derived from spent tyre pyrolysis oil. The pristine CB produced by partial oxidation of the pyrolysis oil in a drop tube furnace was subsequently oxidised in air in a fixed bed reactor to yield HCNS. The effect of oxidation temperature (300 to 700°C) and time (1 to 8 h) on the burn‐off (Bt) of the sample over the duration (t) of
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Promoted catalytic performance of sugarcane bagasse ash supported by γ‐alumina as efficient, stable, and ecofriendly catalyst for dehydration of methanol to dimethyl ether Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-03-04 Abd El‐Aziz A. Said, Mohamed N. Goda, Mohamed M. M. Abd El‐Wahab, Nadia O. El‐Gamal, Mohamed Abd El‐Aal
The aim of this study was to use different proportions (1% to 20% by weight) of γ‐alumina to modify sugarcane bagasse ash (SCBA) for the production of dimethyl ether (DME) through the dehydration of methyl alcohol. A simple precipitation method was utilized to fabricate (1–20 wt.%) Al2O3/SCBA catalysts. X‐ray fluorescence, X‐ray diffraction, Fourier‐transform infrared spectroscopy, transmission electron
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Three‐dimensional simulation of dripping and jetting phenomenon in a flow‐focusing geometry Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-27 Saikat Biswas, Partho S. G. Pattader, Tapas K. Mandal
3D simulations have been achieved on a flow‐focusing geometry employing the VOF method to study the consequence of viscosity, surface tension, wettability, and geometry on drop generation for the dripping regime. Here the dispersed phase is the PDMS oil (polydimethylsiloxane), and the continuous phase is the water. Simulations were performed at different oil‐to‐water viscosity ratios of 3, 12, 27,
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The production of bacterial cellulose from coconut water and its application as a green photocatalyst composite membrane Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-27 Tintin Mutiara, Ajeng Catra Jingga, Amanda Zulfa Widya
In this research work, bacterial cellulose was produced from the fermentation of coconut water and incubated for 4, 5, and 6 days. The bacterial cellulose membrane was utilized as immobilized silver nanoparticles (AgNPs). A green photocatalyst membrane was prepared by reducing silver ions in the bacterial cellulose matrix structure using local fruit extracts, tomatoes, Citrus hystrix fruit, and mangosteen
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Effects of coal gangue on the ash initial deformation temperature and gasification characteristic of biomass Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-25 Hongli Fan, Fenghai Li, Mingxi Guo, Guopeng Han, Qianqian Guo, Meiling Xu
The effects of coal gangue (CG) on the ash initial deformation temperature (IDT) and CO2 gasification characteristic of biomass (chestnut shell [CS] and soybean straw [SS]) were investigated by ash fusion tester and thermogravimetric analyzer, respectively. The IDTs of CS and SS ashes were low because of the presence of abundant low melting point (MP) airchildite (K2Ca(CO3)2) and arcanite (K2SO4),
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Density and viscosity of deep eutectic solvents at different temperatures and compositions: Measurement and prediction model Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-21 Haiou Wang, Yinuo Wang, Shizhuo Wang, Hongjuan Li, Sheng Peng, Yatao Wang, Hao Li, Jing Fang
Deep eutectic solvents (DESs) are becoming increasingly promising as environmentally friendly solvents, and accurate prediction of their density and viscosity is crucial for their successful industrial application. However, existing density and viscosity prediction models primarily rely on temperature variations and often overlook changes in the molar ratio of hydrogen bond acceptors (HBA) to hydrogen
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Enhancement in kerosene droplet–coal particle collision and adsorption by bubble trailing vortex in coal slurry conditioning: Energy evolution of collision process Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-20 Hongzheng Zhu, Zhiqian Qin, Kun Chen, Wenliang Zhu, Qinghui Shi, Ming Yang, Chao Li, Yong Zhang
Understanding the collision between kerosene droplets and coal particles in the bubble trailing vortex region is crucial for enhancing slurry conditioning. We found the area of the bubble trailing vortex region increased as the bubble size increased via the Fluent 6.3.26 software. A kerosene droplet velocity range of 0.074–0.106 m/s and a coal particle velocity range of 0.062–0.104 m/s were obtained
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-16
No abstract is available for this article.
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Study on the equilibrium constants and initial formation temperature of NH4HSO4 and (NH4)2SO4 in coal-fired flue gas Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-15 Xinfeng Yu, Zhuo Chen, Wentao Du, Rongyu Shao, Hao Zhou
With the development and utilization of high-sulfur coal, generating ammonium bisulfate (ABS) and ammonium sulfate (AS) during the coal combustion process has garnered increasing attention. This study examined the formation of ABS and AS under varying temperatures and different initial reactant ratios of SO3 and NH3 by establishing a self-constructed experimental setup. Based on the experimental data
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Cu-modified Fe-Mn magnetic mercury adsorbent and anti-SO2 characteristic Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-14 Yu Shang, Ruhao Gong, Yufeng Duan, Qiang Zhou
A series of Fe6Mn1Cux adsorbents for mercury removal were prepared by using co-precipitation and impregnation methods. The performance of mercury adsorption and anti-SO2 characteristic was studied in a fixed-bed experimental system. The effect of Cu doping amount, reaction temperature, and flue gas components on mercury removal was investigated. The mercury species on the spent adsorbent was analyzed
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Synthesis of alkynyl alcohol derivatives and its corrosion inhibition on N80 steel in 5 M HCl Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-13 Sheng Tu, Pengxi Li, Lunhong Ai, Qi Tang
Alkynyl alcohol derivatives (N-14) were synthesized by 2-chloromethyl pyridine, propargyl alcohol and bromotetradecane and the structure was confirmed by 1H NMR, 13C NMR, MS and FTIR. The corrosion inhibition performance was evaluated by weight loss, Tafel polarization, EIS measurements and DFT quantum calculations. The results proved that N-14 effectively inhibited the acid corrosion of N80 steel
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Balancing strength and sustainability: Incorporating recycled tyres and pawpaw fibre in polystyrene composites Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-06 Adewale George Adeniyi, Sulyman Age Abdulkareem, Mubarak A. Amoloye, Ebuka Chizitere Emenike, Abdelrahman O. Ezzat, Kingsley O. Iwuozor, Hamad A. Al-Lohedan, Favour Taiye Aransiola, Ifeoluwa Peter Oyekunle
The study presents the development and characterization of rubberized fibrillated polystyrene composites using recycled rubber tires and pawpaw fibres. The composites were prepared by varying the proportions of rubber and fibre. FTIR, SEM, EDX and hardness testing were used to characterize the composites. FTIR spectroscopy revealed distinct peaks, including hydroxyl and amine, but with a notable absence
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Study on thermodynamic response in liquefied natural gas storage tanks under static pressurization and sloshing conditions Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Xinshan Sun, Zhan Liu, Wenlong Xue, Yunfan Yang
Liquefied natural gas (LNG) is becoming a potential power fuel in ocean transport and will be widely utilized in the near future. However, severe thermodynamic imbalance issues, caused by environmental heat leakage and external sloshing disturbances, must to be efficiently addressed to improve the operation reliability and safety storage of LNG fuel tanks. In this paper, a comprehensive theoretical
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Kinetic study of the reduction reaction of red mud and CO under fluidization condition Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Hao Kong, Tuo Zhou, Zhe Wang, Chaoran Li, Man Zhang, Hairui Yang
Pyrometallurgical method of iron recovery from red mud (RM) has advantages of simple procedures, high recovery efficiency and significant waste minimization. The fluidization reduction process using CO as reductant addresses the issues of high energy consumption and long reaction time of pyrometallurgical method. In order to optimize the operational conditions of the fluidization reduction process
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Numerical simulation on adsorption of CO2 using K2CO3 particles in the bubbling fluidized bed Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Shuyan Wang, Guangjun Kuang, Baoli Shao, Xi Chen, Lei Xie, Yimei Ma
With the increase of greenhouse gas emissions, global warming has become an urgent problem, and the use of solid adsorbents to capture CO2 gas in flue gas has attracted more and more attention. In this study, the process of CO2 capture by K2CO3 particles in the bubbling fluidized bed (BFB) is numerically simulated with Eulerian–Eulerian(E–E) two fluid model incorporating with the kinetic theory of
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Evaluation on thermal pyrolysis of biomass straw waste: Focusing aspects of products yields, syngas emissions and solid products characterization Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Xiwen Yao, Haodong Zhou, Pengyuan Qi, Kaili Xu
In this study, a systematic and quantitative investigation of the pyrolysis characteristics of biomass was conducted in a fixed-bed tubular reactor, and the influence of pyrolysis temperature on product yields, gas emission characteristics, and syngas compositions as well as physicochemical characterization of resulting solids (i.e., char/ash morphologies, mineral transformations, and elemental compositions)
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Hydrodynamic analysis of nanofluids flow over 45° inclined porous square cylinder using Darcy–Brinkman–Forchheimer model Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-05 Jaspinder Kaur, Jatinder Kumar Ratan, Roderick Melnik, Anurag Kumar Tiwari
Various engineering applications commonly involve the flow of nanofluids over a porous 45° inclined square cylinder. Therefore, the current study is to assess the impact of the Darcy parameter (Da), nanoparticle volume fraction (ϕ), and Reynolds number (Re) on the momentum transport characteristics over the 45° inclined porous square cylinder. The governing equations were solved numerically using the
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First-principles study on the surface properties and floatability of magnesite tailings and its main gangue Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-04 Zhonghua Xue, Yali Feng, Haoran Li, Jun Yang, Mengyao Liu, Yufeng Cui
The accumulation of magnesite tailings (MT) poses challenges such as resource wastage, land occupation, dust generation, and environmental pollution, thereby jeopardizing both physical and mental health. Urgent attention is required for the proper treatment of this solid waste material. An in-depth investigation into enhancing the flotation processes of MT is essential. A comprehensive comprehension
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Analytical modeling of particle size effect on impact wear deformation characteristics of ductile materials Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-02-01 Xuewen Cao, Junwen Chen, Xuerui Zang, Jiaxin Feng, Wenshan Peng, Xiaoyang Sun, Jian Hou, Jiang Bian
This study aims to analytically predict the material impact wear rate and improve the prediction accuracy and applicability of existing impact wear prediction models. The ABAQUS software was used to numerically model and analyze the erosion pit morphology and stress distribution characteristics. Micromorphological testing was used to investigate the impact wear damage mechanism, and an improved impact
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Stability and thermodynamic property of TiO2/R141b nanorefrigerants by multi-objective optimization Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-28 Ming Xing, Yuling Zhai
Utilizing nanorefrigerants as working fluids can significantly enhance the energy efficiency of low-temperature waste heat recovery systems (≤ 50°C). Refrigerants with low viscosity and density require a substantial amount of surfactant to maintain a stable suspension of nanoparticles. However, the excessive use of surfactants, which have a notably low thermal conductivity, could lead to foam generation
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Application of PC-SAFT EoS and SCFT for the modeling of thermophysical properties comprising deep eutectic solvent and alcohols Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-28 Ncomeka Mgxadeni, Bakusele Kabane, Ariel Hernández, Indra Bahadur, Faruq Mohammad, Ahmed Abdullah Soleiman, Hamed Hashemi, Mwadham M. Kabanda
Zinc (II) chloride based deep eutectic solvent (DES) were formed by mixing zinc (II) chloride with phosphoric acid. Fourier-transform infrared spectroscopy was used to identify any possible shifts when the two compounds were assorted, and differential scanning calorimetry (SDT Q600 V20.9 Build 2D) was utilized to evaluate the formation of deep eutectic solvent. Densities, ρ $$ \uprho $$ , and speed
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Synthesis of mesocarbon microbeads from high-temperature coal tar pitch: Effects of quinoline insoluble Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-25 Gu Zishuo, Wang Fei, Wang Yunyang, Fang Yilin, Zhu Yaming, Lv Jun, Cheng Junxia, Wang Ying, Zhao Xuefei
Mesocarbon microbeads (MCMBs) were a kind of functional artificial carbon materials, which was widely used in varied areas with its excellent properties. MCMB was generally produced by thermal-polymerization of high-temperature coal tar pitch under oxygen-free atmosphere. Generally, the content of primary quinoline insoluble (PQI) play a key role on the quality of the derived MCMB. In order to confirm
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Efficient separation and recovery of Co and Ni from ammonium sulfate roasting-water leaching solutions of oceanic cobalt-rich crusts by sulfide precipitation and P507–Cyanex 272 synergistic extraction Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-21 Jinrong Ju, Yali Feng, Haoran Li, Zhonghua Xue, Jun Yang, Xingquan Du
Oceanic cobalt-rich crusts contain many valuable metals including Co, Ni, Cu, and Mn, of which Co and Ni are scarce metal resources on terrestrial land. Co, Ni, Cu, and Mn in cobalt-rich crusts can be efficiently extracted by the ammonium sulfate roasting-water leaching (ARWL) process, but separating and recovering Co and Ni from the leaching solution containing high concentrations of Mn is a challenging
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Operational process stability in pilot dry anaerobic digester of source-sorted organic fraction municipal solid waste Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-16 Afifi Zainal, Razif Harun, Liyana Yahya, Syazwani Idrus
The organic fraction of municipal solid waste (OFMSW) is a major portion of solid waste in Malaysia, with 44.5% of the total waste being food waste-derived sources. This study investigates the performance of dry anaerobic digester (DAD) operation using the pilot dry anaerobic digester (PDAD), a plug flow reactor, in treating source-sorted organic fraction municipal solid waste (SS-OFMSW) for biogas
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A study on the performance of a swirling–straight composite nozzle Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-15 Dongxing Yu, Shuchao Li, Jun Zhang, Ning Wang, Zongyu Ling
The nozzle is the key component of water mist fire extinguishing system. As a response to the problems of small injection angle associated with straight jet nozzles and the weak axial momentum of swirl nozzles, a swirling–straight composite nozzle is designed in this work. The comparison with a straight jet nozzle and a pressure swirl nozzle shows that the swirling–straight composite nozzle has a larger
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Study on characteristics and mechanism of re-entrainment in intake filtration components of the gas turbine Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-14 Yunda Fei, Jianhua Wang, Yanming Liu, Shijun Sun
Aiming at the problem that the droplet re-entrainment in the intake filtration components affects the gas intake quality and the safe operation of gas turbines, the characteristics and mechanism of the re-entrainment in a marine double-hook inertial stage filter are studied, and the distribution of liquid film and re-entrainment under different inlet air velocities and droplet size distributions are
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Indirect solution modeling of melting behavior of SiO2 based on the image processing technology Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-11 Cunhao Lu, Yi Zhang, Jiayi Zhang, Weixiang Sun, Anying Xia, Mingli Zhang, Jian Chen
The utilization of tempered blast-furnace slag through the direct fiber forming process to produce high-value thermal insulation materials offers a dual benefit: it efficiently utilizes the latent heat in the unused slag and significantly increases the value of blast-furnace slag utilization. However, measuring the melting properties of iron slag at high temperatures is challenging. In this study,
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Influence of ionomer concentration and membrane thickness on membrane electrode assembly in alkaline fuel cell performance Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-07 Nur Ubaidah Saidin, Omar Syah Jehan, Kok Seng Leong, Thye Foo Choo, Wai Yin Wong, Kee Shyuan Loh, Rozan Mohamad Yunus
The alkaline fuel cell is subject to extensive research owing to its fast kinetic response relative to acidic media. However, the efficiency of the catalytic layer at the electrodes depends on the amount and distribution of ionomers present there. It is crucial to have the right ionomer concentration to have the best cell performance. Additionally, the membrane thickness is a significant parameter
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Study on the combination of the annular jet pump and static mixer to improve the fluid-carrying capacity of gas wells Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2024-01-07 Huizhen Liang, Chengzhen Li, Jian Ma, Lin Mu
Aiming at the problem that the suction chamber of the gas-driven jet pump has insufficient mixing of the power gas and the sucked fluid leading to efficiency reduction, this study proposes to effectively combine the static mixer with the annular jet pump and design a new type of annular jet pump and apply it to the gas wells to improve the fluid recovery capacity. Numerical simulations based on the
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Computational fluid dynamics study on three-dimensional polymeric scaffolds to predict wall shear stress using machine learning models for bone tissue engineering applications Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-27 Sudalai Manikandan E, Thirumarimurugan M, Gnanaprakasam A, Satthiyaraju M
Geometrical patterns and dimensions of the polymeric scaffold play a major role in controlling the degradation and mechanical stimuli for osteogenic differentiation. Wall shear stress (WSS) analysis of scaffold provides a better understanding of the body fluid flow dynamics. A computational fluid dynamics (CFD) study was carried out to understand velocity profile and WSS distribution when the strands
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An efficient and template-free synthesis of mesoporous silica from coal fly ash Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-22 Dandan Liu, Huimin Qiao, Shiyao Qin, Xin Xing, Kezhou Yan
In the study, the desilication liquids and acid-leached residues derived from the “alumina extraction process” of coal fly ash (CFA) were used as raw materials to prepare sodium silicate precursor. Then, the mesoporous silica with controllable pore structure properties was synthesized by an efficient, template-free process from obtained sodium silicate. The effect of the sodium silicate properties
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Rare earth element stripping from kaolin sands via mild acid treatment Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-21 Max Koch, Michael Paper, Thomas B. Brück, Tom Nilges
Due to their chemical and physical properties, rare earth elements (REEs) are essential in modern applications such as energy conversion or IT technology. The increasing demand for these elements leads to strong incentives for REE recovery and induces the exploration of new, alternative sources for REEs. Accessing REEs from clay minerals, in our case kaolinite, by an elution process is a promising
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Supercharging green chemistry: Unleashing 1, 4-NADH regeneration and unprecedented C(sp3)-F bond activation via NiS-NiO/S-g-C3N4 nanocomposite photocatalyst under solar light Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-19 Sanjana Kumari, Atul P. Singh, Rajesh K. Yadav, Satyam Singh, Rehana Shahin, Indra Kumari, Aditya Nath Yadav, Abhishek K. Yadav, Kavita Sharma, Dilip K. Dwivedi, Hany W. Darwish, Jeong Ryeol Choi
Fluorinated and enzymatic chemicals are widely used in society due to their chemical, physical, and biological qualities. Nevertheless, despite their vital importance, present approaches to adding fluorine to molecules and regenerating enzyme cofactors have serious flaws. For instance, numerous approaches are photocatalytic and employ stoichiometric counterparts of heavy metals. Prevailing photocatalytic
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Effect of symmetrical and asymmetrical structures of transverse tube on heat transfer performance of nanofluids in a solar collector system Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-18 Maoqing Tang, Xinyi Jiang, Cong Qi, Lin Liang, Dongtai Han
In an effort to enhance the heat transfer performance of solar collectors, this paper proposed to replace the smooth tube with symmetrical and asymmetrical transversely corrugated tubes, and to couple with SiO2-H2O nanofluids for heat transfer of solar collectors. Effects of nanofluids mass fraction (w = .0%, .1%, .3%, and .5%), Reynolds number (3000, 4000, 5000, 6000, and 7000), and groove radius
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A novel cat swarm optimization-based fuzzy PI controller for improving dynamic response of converter Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-13 Kanjikovil Marimuthu Priya, Thangaraju Balakumaran
Nowadays, the use of fuel cells in various applications has become very widespread. Some of their most important applications are in electric vehicles (EVs) and local off-grid power systems. An EV works as an electric motor that burns a mixture of fuel and gases to generate electricity. One of the challenges with fuel cells is the slow dynamic response to load power changes. In the past few decades
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-14
No abstract is available for this article.
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Study on pyrolysis behavior of agricultural and forestry wastes using thermogravimetric-Fourier transform infrared spectrometer (TG-FTIR) Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-14 Na Liu, Jishuo Li, Jia Liu, Kaili Xu, Fengyu Ren, Xiwen Yao
To investigate the effective utilization of agricultural and forestry wastes for mitigating the shortage of primary energy and environmental pollution, the pyrolysis behavior of corn straw (CS), wheat straw (WS), and poplar sawdust (PS) was studied using thermogravimetric–Fourier transform infrared (TG-FTIR) analysis. The activation energies and pyrolysis mechanism functions of different biomass types
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K2CO3-loaded γ-Al2O3 for acid removal in waste transformer oil Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-13 Kai Fei, Zhuo Yi Dong, Li Shi, Xuan Meng, Naiwang Liu
Transformer oil plays a critical role in ensuring the insulation and normal operation of power transformers. However, during operation, the transformer oil would undergo oxidation and degradation, leading to the formation of acids and polar compounds that increase its acidity and degrade its performance. Hence, the recycling and regeneration of aged transformer oil is an essential practice in transformer
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Study on quantitative structure–activity relationship of amine surfactants in coal reverse flotation Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-12-11 Liang Shen, Zihan Li, Jiabao Gong, Lingyun Liu, Erle Qiao, Yifang Liu, Fanfei Min
With the deterioration of underground coal quality, hundreds of millions of tons of coal slime in China need to be treated using flotation methods every year. However, the design and selection of coal slurry flotation collectors lack theoretical guidance. In this paper, the quantitative structure–activity relationship (QSAR) model between the molecular structure descriptors of collectors and the flotation
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Ash fusion characteristics of iron-rich coal in Xinjiang under different atmospheres and the influence mechanism of adding red mud and pipeline scale Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-28 Junxin Lv, Yonggang Wang, Chao Zhang, Deping Xu, Xiongchao Lin, Yahan Bao
To realize the high-efficiency utilization of iron-rich coal, it is necessary to conduct in-depth research on the ash fusion characteristics and regulation mechanism. In this paper, the ash fusion temperature test of iron-rich coal in Xinjiang (ZC) under different atmospheres was first carried out. Then, red mud (HJ) from Huajin Aluminum Industry and black water pipe scale (GDG) were selected as the
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Energy efficiency enhancement of a thermal power plant by novel heat integration of Internal Combustion Engine, Boiler, and Organic Rankine Cycle Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-28 Razia Talib, Zakir Khan, Shahzad Khurram, Abrar Inayat, Moinuddin Ghauri, Mohsin Abbas, Ian Watson
The utilization of waste energy contributes to reducing carbon emissions and mitigating global warming. A novel heat integration system comprising an Internal Combustion Engine (ICE), Boiler, and Organic Rankine Cycle (ORC) coupling is techno-economically examined in this study. The feasibility of waste heat recovery from industrial boilers of a thermal power plant (Gadoon Textile Mills Limited, Pakistan)
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Optimisation of H-doped WO3 synthesis at ambient conditions for potential acetone gas sensing Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-27 Ramanath Tamelarasan, Newton Well Lo, Kasturi Muthoosamy, Suchithra Thangalazhy-Gopakumar
Tungsten trioxide (WO3) is a highly desired semiconductor metal oxide (SMO) to detect acetone gas which is present at high levels in the breath of diabetic patients. Current research in the biosensor field is focused on the synthesis of sensing material at room temperature to ease fabrication and reduce energy requirements for operations. In this context, hydrogen doping aids in increasing the baseline
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Soft analyzer for sulfur content in tail oil of hydrocracking process based on adaptively regularized dynamic polynomial PLS Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-27 Yating Yao, Xiaohang Shen, Linke Qiao, Ziteng Zuo, Weiming Shao, Dongya Zhao
Hydrocracking process is an essential and widely used means to remove impurities such as sulfur, nitrogen, and oxygen from heavy oil in refineries. The sulfur content in the tail oil of the hydrogenation process is a key quality index that must be strictly monitored and controlled. However, the traditional measurement ways of the sulfur content suffer from either large delays or high investment and
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Study on porous layer formation kinetics under CO2-aqueous conditions via partial-bounceback lattice Boltzmann method Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-27 Jukai Chen, Xiaodan Wang, Yueshe Wang, Haisheng Li, Yinghua Chen
The porous layer of FeCO3, as a main corrosion product in CO2 aqueous environments, has a critical influence on corrosion kinetics. However, multi-physicochemical processes are involved in the evolution of the FeCO3 porous layer, such as homogeneous chemical reactions, multi-component transport, and dissolution/precipitation at the solid–fluid interface, which is notoriously complicated to be totally
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Modelling and simulation of thermal runaway phenomenon in lithium-ion batteries Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-21 Ali Alshammari, Mudhar A. Al-Obaidi, John Staggs
To improve the operational time of electronic devices and the driving spectra of electric cars, multiple investigation missions regarding batteries are focussed on refining the energy capacity of batteries. However, this pursuit of better performance introduces potential risks, such as fire incidents, due to the use of dynamic materials in lithium-ion batteries (LIBs) to enhance their electrochemical
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Advancing energy and water solutions: Unleashing the potential of Nd2S3:Ni9S8 thin film for supercapacitors and sustainable water purification Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-21 Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Ammar Mohamed Tighezza
The research was done on the creation and use of bi-metal sulfide thin film, Nd2S3:Ni9S8. 41 nm-sized crystallites with 80% crystallinity were found in the material. The evaluated optical characteristics showed a 2.9 eV band gap energy. The presence of Nd3d, S2p, and Ni2p in the created material was confirmed by X-ray photoelectron spectroscopy. Voltammetry tests were carried out to assess the electrochemical
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Study on high-temperature corrosion in a 600 MW opposed firing boiler Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-21 Xinyu Ning, Jin Wang, Jian Huang, Haoxuan Ding, Bin Li, Lei Deng, Yiguo Li
Low-nitrogen burners and air-staging system, which would generate a large amount of CO and H2S in the furnace, are frequently adopted in the coal-fired boilers in China. This is one of the main reasons for the high-temperature corrosion of the water-cooled wall, while the other is the high wall temperature. In this study, the influences of boiler load, burner tilt angle and near-wall air (NWA) nozzles
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19th Asian Pacific Confederation of Chemical Engineering (APCChE) Congress 2022: Working towards a sustainable society—Special issue Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-20 Tin Sin Lee, Chien Hwa Chong
This special issue captures the papers of 19th Asian Pacific Confederation of Chemical Engineering (APCChE) Congress 2022 with the theme “Working Towards a Sustainable Society.” Since the announcement of 17 Sustainability Development Goals by United Nations, chemical engineers are obligated to use their expertise to engineer the industries towards environmental friendly technology. Chemical engineers
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A semi-supervised JITL paradigm based on manifold regularization for online soft sensor development Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-16 Junxi Zhou, Xu Li, Weiming Shao, Dongya Zhao
Just-in-time learning (JITL) is often used for soft measurements of nonlinear time-varying processes due to its desirable properties. Nevertheless, most existing JITL methods utilize only limited labeled data, ignoring abundant information of plentiful unlabeled data, which prevents the JITL-based soft sensors from achieving the best performance. To address this issue, this paper proposes a semi-supervised
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Machine learning-assisted analysis and prediction for the thermal effect of various working fluids in a vortex tube Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-13 Zheng Wang, Nian Li, Jialun Zhong, Neng Gao, Xiangji Guo, Guangming Chen
With the widespread application of vortex tube in various fields, it becomes essential to quantitatively explore the separation effect of different fluids (natural fluids, hydrocarbons, etc.) within the vortex tube and to promote its utilization. A new approach has been developed in this study to establish quantitative models for predicting the thermal effects of different fluids in a vortex tube.
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Characterization of carbon nanotubes reinforced PVOH polymer composites added with calcined clam shells with the presence of electron beam irradiation Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-12 Soo-Tueen Bee, Soo-Ling Bee, Lee Tin Sin, Shei-Ching Lee
The objective of this research is to scrutinize the effect of electron beam irradiation and filler (calcined clam shell and carbon nanotube) addition on the characteristics of the resulting polyvinyl alcohol (PVOH) blends. Herein, PVOH/calcined clam shells/carbon nanotube (CNT) blends were prepared by solution casting, which followed by electron beam irradiation treatment at the irradiation dosage
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Noise reduction and characteristic analysis of fluid signal in the jet impact-negative pressure deamination reactor based on wavelet transform Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-05 Xiaodie Huang, Xingzong Zhang, Xingjuan Xie, Facheng Qiu
The jet impact-negative pressure deamination reactor (JI-NPDR) is a new type of continuous and efficient deamination equipment. The study of the random flow pattern of porous jet impingement in the reactor under negative pressure conditions is an important issue. In this work, the signal processing method based on wavelet transform is used to analyze the characteristics of random flow signals in the
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Exploration of entropy analysis and viscous dissipation on radially convective flow of (Cu-Al2O3:H2O) hybrid nanofluid over a stretching disk Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-11-02 Bhumarapu Venkateswarlu, Panyam Venkata Satya Narayana, Sang Woo Joo
The current research work deals with the impact of suction/injection on the thermally radiating convective flow generated by a nonlinear stretched disk. The energy equation is addressed by the presence of thermal radiation and the energy dissipative function. This work was carried out with the help of the Das and Tiwari (single-phase nanofluid) models and the Maxwell Garnett and Brinkman nanofluid
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Release behavior and biodegradability of controlled-release potassium fertilizer encapsulated in starch–alginate matrix Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-10-30 Ying Si Chen, Siew Wei Phang, Anis Suhaila Shuib, Jen Looi Tee
This work presents the fabrication of potassium chloride encapsulated in starch–alginate matrix, crosslinked by calcium chloride to form hydrogel bead. Sixteen formulations (S1–S16) were designed in four levels sodium alginate (SA 0.5% w/v to 2.0% w/v) and potassium chloride (KCl 5% w/v to 20% w/v) with 10% w/v starch and 0.75 M calcium chloride. The analysis reviewed that a higher concentration of
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Effect of Ca–Fe composite catalysts on pyrolysis performance of demineralised anthracite and its char structure transformation Asia Pac. J. Chem. Eng. (IF 1.8) Pub Date : 2023-10-24 Chengli Wu, Shuhao Shen, Xiang Wu, Hanxu Li, Facun Jiao
While catalytic pyrolysis with catalyst addition has been widely studied with a primary focus on optimising gas, tar and char yields, studies exploring the evolution of char structure during coal pyrolysis remain scarce. This knowledge gap potentially affects subsequent char gasification processes during coal conversion within gasifiers. This study presents demineralised anthracite (TM) prepared by