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Investigation of wet coal flow characteristics in silos by experiments and simulations Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2021-01-13 Li Dai; Zhulin Yuan; Lei Guan; Conghui Gu
The investigation of the wet coal flow characteristics is carried out in a three‐dimensional silo system by experiments and simulations. The effect of the moisture content on the flow characteristics is firstly investigated by experiments, which is in terms of bulk density, angle of repose, and flow rate at outlet. When moisture content is below 9%, the coal particles act as the easy flow mode. When
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Experimental study on kinetic characteristics of oil sludge gasification Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2021-01-11 Zhiwei Chu; Zhiqiang Gong; Zhenbo Wang; Haoteng Zhang; Jinhui Wu; Ziyi Wang; Yizhi Guo; Jianqiang Zhang; Guoen Li; Lei Zhang; Hongpeng Wang
Oil sludge (OS) is a typical dangerous waste in petroleum industry, which also contains abundant energy. The purpose of this study was to recover resources from OS gasification. To figure out the gasification process, a thermal analyzer was used to carry out OS gasification experiments under steam/nitrogen atmosphere with different heating rates. Results showed that the OS gasification reaction could
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An integrated simulation–optimisation approach for free fatty acid removal in palm oil deodorisation process Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2021-01-07 Mun Cheng Tan; Dominic C.Y. Foo; Shyam Lakshmanan
Deodorisation is the key process to produce high‐quality refined, bleached and deodorised palm oil (RBDPO) in a palm oil refinery. In this work, an integrated simulation–optimisation approach was adopted for the analysis of a deodorisation process in an operating palm oil refinery. The process includes a deodoriser unit that removes free fatty acids (FFA) from bleached palm oil (BPO), and a vacuum
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Application of flying jet plasma for amelioration of polyvinylidene fluoride membrane properties towards enhanced membrane distillation Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-29 Wameath S. Abdul‐Majeed
This study explored the feasibility of applying sequential argon‐CF4 plasmas treatment as a featured approach towards enhancement of polyvinylidene fluoride (PVDF) membrane structure and surface topography for application in membrane distillation (MD). Systematic procedures were conducted to synthesize membranes of different combinations composed mainly from PVDF and assisted by addition of polyvinylpyrrolidone
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Catalytic ozonation of ethyl acetate over mesoporous manganese oxides synthesized by a sonochemical method Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-20 Zhongjun Xu; Zhiyuan Qin; Tingting Zhang; Xiaochun Chen
Ethyl acetate is one of typical volatile organic compounds (VOCs) emitting from solvent use, and removing ethyl acetate from exhaust air is vital to VOCs abatement. The mesoporous manganese oxide (MnOx) samples were sonochemically synthesized by the reduction of KMnO4 using Mn(NO3)2. The characterization shows that γ‐MnO2, β‐MnO2, and bixbyite‐like Mn2O3 were obtained by calcining the MnOx samples
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Effects of oilfield injection water component on rheological characteristics of CTAC/NaSal aqueous solution Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-18 JiaQiang Jing; Ying Yuan; Ran Yin; Ming Zhang; XiaoYun Yin; XueWei Liu
The additive drag reduction technology has wide application and high economic value in drag reduction of oilfield water injection system. With CTAC/NaSal (cetyltrimethyl ammonium chloride/sodium salicylate) aqueous solution as the research object, this paper explores the effects of oilfield water component on its rheological characteristics under the experimental condition of 10–60°C, .1–1 000 s−1
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Comparison of bubble velocity, size, and holdup distribution between single‐ and double‐air inlet in jet microbubble generator Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-18 Xiaoheng Li; Wenbing Su; Yu Liu; Xiaokang Yan; Lijun Wang; Haijun Zhang
The jet microbubble generator is often used to produce bubbles in flotation equipment, which generates microbubbles by self‐absorbing or inflating. Bubble behavior is a dominant factor in froth flotation, and its velocity, size, and distribution greatly affect flotation performance. However, the asymmetry distribution of the pressure, bubble velocity, and gas holdup in generator with single inlet probably
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Preparation of cigarette butts/coal‐based porous carbon and its catalytic methane decomposition to hydrogen Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-14 Huafeng Luo; Tongda Li; Yuandong Qiao; Zhangxuan Ning; Chunli Bo
A new type of cigarette butts/coal‐based composite porous carbon was prepared by potassium hydroxide chemical activation method and used for methane decomposition to hydrogen. The effects of mass mixing ratio of the used cigarette butts/coal and carbonization temperature on the surface properties and structure of carbon materials were studied. The results show that the optimal mass mixing ratio of
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Preparation of activated porous glass adsorbent through thermochemical reforming of ampoules and eggshells for remediation of direct blue dye pollution Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-12 Zahid Hussain; Amir Zada; Khadim Hussain; Muhammad Y. Naz; Nasser M. AbdEl‐Salam; Khalid A. Ibrahim
The recycling of chemical containing glass bottles is generally not recommended due to high health risk. In this study, used glass ampoules were devitrified into a porous material by coprocessing with eggshells, salt, and soda at different temperatures. In this thermochemical reaction, eggshells decomposed into calcium, porogenic gases, and char. The calcium worked as a flux in the reaction while char
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Mass transfer study in eductor liquid–liquid extractor: Dimensional analysis and response surface methodology modeling Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-09 Mostafa Hosseinzadeh; Mansour Shirvani; Ahad Ghaemi; Bahare Esmaeeli
In this work, the mass transfer performance of a new eductor liquid–liquid extractor is investigated experimentally and modeled by dimensional analysis and response surface methodology (RSM) with the utilization of water/acetic acid/toluene system. A correlation is derived for the overall mass transfer coefficient versus the Reynolds number, throat to nozzle area ratio, projection ratio, and the two
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Engineering multistructure poly(vinylidene fluoride) membranes modified by polydopamine to achieve superhydrophilicity, excellent permeability, and antifouling properties Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-09 Jie Ding; Jianxian Zeng; Yajie Zeng; Zhengqiu Yuan; Xiaoping Huang; Yanna Wu
Polydopamine (PDA) was coated on poly(vinylidene fluoride) (PVDF) membranes with different structures to select the most suitable structure for achieving outstanding hydrophilicity, permeability, stability, and antifouling properties. PVDF membranes were prepared with different solvents (N‐methyl‐2‐pyrrolidone [NMP], N,N‐dimethylacetamide [DMAc], N,N‐dimethylformamide [DMF], NMP/DMAc, NMP/DMF, DMAc/DMF
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-07
No abstract is available for this article.
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Ti–Mn coating prepared by tungsten inert gas cladding and its inhibiting coking property Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-07 Jingpeng Li; Xiaochun Yu; Runqiu Wang; Zhiyuan Wang; Laizhi Wang; Jianxin Zhou
The Ti–Mn cladding layers with different ratios were prepared on the surface of 310S steel using tungsten inert gas (TIG) technology for inhibiting coking in ethylene cracking, and the cladding specimens were oxidized by muffle furnace for 10 h at 800°C. The coking evaluation tests of the oxidized specimens with different Ti–Mn powder ratios were carried out with light naphtha at 850°C. The results
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Real‐time optimization for nonlinear processes including output saturation Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-02 Gwang‐Noh Ahn; Sanghun Lim; Su Whan Sung; Jietae Lee
Output saturation is observed in many chemical processes and microbial cultivation processes. In these processes, output saturation can cause a number of control problems near the saturation point due to the nonlinear continuous input multiplicity interval after the saturation point. In general, the widely used proportional‐integral‐derivative (PID) controller cannot perform its function due to the
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Process evaluation of solvent‐free lipase‐catalyzed esterification schemes in the synthesis of structured triglycerides from oleic and palmitic acids Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-12-02 Ramelito Casado Agapay; Yi‐Hsu Ju; Phuong Lan Tran‐Nguyen; Suryadi Ismadji; Artik Elisa Angkawijaya; Alchris Woo Go
Different schemes in the production of structured triglycerides based on solvent‐free esterification of oleic acid and palmitic acid with glycerol were evaluated in terms of reactant conversion, product composition, and yield. Two‐step processes, with or without glycerol dosing, were compared with one‐step versions carried out at temperature conditions within 40°C–60°C to a final oleic acid/palmitic
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The nonisothermal two‐phase model based on mixed convection in passive μDMFC Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-25 Luwen Wang; Zhenyu Yuan
During the working process of passive microdirect methanol fuel cell (μDMFC), the characteristics of inverse movement between two‐phase substances are quite distinct from macro gas–liquid inverse movement, including electrochemical reactions, electrical drag, multicomponent diffusion, evaporation, and condensation. Due to the complexity of internal operation system of μDMFC, it is difficult to monitor
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Fault detection of FWTPs in coal‐fired power plants using K‐WD‐KPCA in consideration of multiple operation conditions Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-24 Yuling Tang; Shirong Zhang
In coal‐fired power plants, the feed water treatment processes (FWTPs) supply qualified water to utility boilers. The faults of an FWTP may endanger the whole power plant. The classical PCA‐/KPCA‐based fault detection algorithms are valid mainly under single operation condition. When they are put to a practical FWTP, they cannot deal with the problems as treatment route switching, multiple operation
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Ethanol‐free extraction of resveratrol and its glycoside from Japanese knotweed rhizome by liquefied dimethyl ether without pretreatments Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-18 Hideki Kanda; Kazuma Oishi; Siti Machmudah; Wahyudiono; Motonobu Goto
Herein, we carried out the extraction of polyphenol resveratrol and its glycoside (piceid) from raw Japanese knotweed via a simple method, employing dimethyl ether (DME) as the solvent. With DME extraction, the conventional drying and cell wall disruption steps can be left out. As a result, more resveratrol and piceid were obtained in DME extraction than in conventional ethanol extraction. Because
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Flow and heat transfer characteristics in square channel with concave–convex vortex generators based on numerical simulations Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-18 Yuncong Jiang; Bingyu Chen; Chengdong Duan; Xiaokang Yan; Lijun Wang
This paper aims to obtain a better heat transfer performance by using vortex generators with different structures in the square channel. To compare the flow pattern of three different vortex generators, the stream‐wise velocity profile, the visualized Q‐criterion, and the stream‐wise vorticity flux distribution were used to obtain the flow structures in detail. The heat transfer performance was quantified
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Monitoring of whitening agent for skin analysis using tyrosinase gold nanoparticle‐based colorimetric assay Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-17 Mohd Farhan Siddiqui; Sojeong Jeon; Moon‐Moo Kim
Arbutin is a potential depigmenting agent that reduces melanin production by inhibiting tyrosinase activity and predicts the risk of whitening of the skin. Despite wide acceptance in routine laboratory tests, the conventional methods for whitening agent analysis have been of limited use because of high cost and lower signal sensitivity. Gold nanoparticles have gained considerable interest in improving
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Role of graphene oxide/yttrium oxide nanocomposites as a cathode material for natural dye‐sensitized solar cell applications Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-13 T. Shanmugapriya; J. Balavijayalakshmi
Natural dye‐sensitized solar cells (DSSCs) are becoming promising candidates for replacing synthetic dyes. Graphene oxide is prepared from natural graphite flakes by modified Hummers method. A novel graphene oxide/yttrium oxide (GO/Y2O3) nanocomposites are prepared by chemical precipitation method. The different concentration of (5:1, 5:2, and 5:3) of yttrium oxide nanoparticles exaggerated on the
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Influence of dielectric property of organic sulfur compounds on coal microwave desulfurization Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-11 Tao Ge; Fen Li; Yang Li
The present study aims to reveal the influence mechanism of organic sulfur structures and microwave frequency on its dielectric property and establish the relationship between the dielectric properties of organic sulfur components in coal and the efficiency of microwave desulfurization. Results showed that the different polarization mechanisms of organic sulfur compounds lead to the real part of complex
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Modified Smith predictor‐based all‐proportional‐derivative control for second‐order delay‐dominated integrating processes Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-10 Somak Karan; Chanchal Dey
An all‐proportional‐derivative (PD) control‐based modified Smith predictor design is reported here for second‐order delay‐dominated integrating processes. The proposed control structure is realized with two PD controllers along with a first‐order filter towards achieving the desired closed‐loop response. To eliminate the tuning complexity, reported internal model control (IMC) scheme suggests a single
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Solid–liquid equilibria in the quaternary system LiBr−NaBr−KBr−H2O and its two ternary subsystems at 288.15 K Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-10 Xiao‐Yun Qi; Chun‐Xia He; Shi‐Hua Sang; Jia Liu; Yun‐Yun Gao
The solubilities of the LiBr−NaBr−KBr−H2O system and its subsystems LiBr−NaBr−H2O and LiBr−KBr−H2O were investigated at 288.15 K by the isothermal dissolution equilibrium method, and the corresponding phase diagrams were plotted, respectively. In the three systems, neither solid solution nor double salt was found. For the first subsystem LiBr−NaBr−H2O, there are two invariant points, three dissolution
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Polyethylene terephthalate waste‐derived activated carbon for adsorptive desulfurization of dibenzothiophene from model gasoline: Kinetics and isotherms evaluation Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-09 Abdelrahman B. Fadhil; Hajir N. Saeed; Liqaa I. Saeed
The present study concentrates on the preparation of activated carbon (AC) from a low‐cost precursor, namely, polyethylene terephthalate waste, as a potential alternative adsorbent to commercially activated carbon for desulfurization of model gasoline at ambient temperature. Polyethylene terephthalate was carbonized at 450°C, and the produced char was steam activated at 750°C for 90 min to prepare
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Effect of carbon dioxide, argon, and helium jets on the synchronous control of combustion instability and NOx emission Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-11-04 Chengfei Tao; Hao Zhou; Liubin Hu
This article experimentally studies the synchronous control of combustion instability and NOx emission in a model gas turbine combustor. The application of tabular jet in cross flow was adopted to test the effectiveness of synchronous control. The flow rate, height, direction, and relative molecular masses were studied in this research. Results suggest that the ideal damping ratio of the sound pressure
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Flame front propagation and sinter strength properties of permeable sintering bed prepared via enhanced granulation with hydrated lime Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-27 Mingxi Zhou; Hao Zhou
This paper is focused on investigating the influences of enhanced granulation with hydrated lime on the propagation of flame front and strength properties of the produced sinter in iron ore sintering. Pilot‐scale sinter pot experiments were performed at three hydrated lime levels, and the porous structures of sinter were reconstructed by high resolution X‐ray tomography. When hydrated lime increased
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Analysis of ionic and nonionic surfactants blends used for the reverse micellar extraction of Lactoperoxidase from whey Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-23 Shwetha Karanth; Regupathi Iyyaswami
Bovine Lactoperoxidase (LP), a minor whey protein, is used as an antimicrobial in cosmetic, food, and pharmaceutical preparations. Industries are in pursuit of reliable, cheap, and scalable purification methods as the conventional techniques for LP purification like chromatography and membrane separation suffer from several drawbacks. The present work investigates the selective reverse micellar extraction
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Influence of calcination temperature on SO2 resistance of Mn‐Fe‐Sn/TiO2 catalysts at low‐temperature Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-22 Xianjin Huang; Yufeng Duan; Jialin Meng; Xiang Wu; Weimeng Zhao; Peng Hu; Chun Zhu; Hongqi Wei; Yonggui Ma
The Mn‐Fe‐Sn/TiO2(MFST) catalysts for NO and Hg co‐removal with SO2 resistance at low temperature were prepared by the impregnation method under different calcination temperatures (300, 400, 500, and 600°C). The influences of calcination temperatures on SO2 resistance and of SO2 concentration on both denitration and demercuration performances of the Mn‐Fe‐Sn/TiO2 catalysts were investigated in a fixed‐bed
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Potassium and 12‐tungstophosphoric acid loaded alumina as heterogeneous catalyst for the esterification as well as transesterification of waste cooking oil in a single pot Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-21 Himmat Singh; Amjad Ali
To prepare the heterogeneous catalyst for the simultaneous transesterification and esterification of waste cooking oil (WO), 12‐tungustophosphoric acid (TPA) and K+ were loaded over alumina. The catalyst structure was confirmed by powder X‐ray diffraction analysis while the catalyst composition and the elemental oxidation state by X‐ray photoelectron spectroscopic study. The surface morphology of the
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Superior adsorption of cationic dye on novel bentonite/carbon composites Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-20 Nady Fathy; Sahar El‐Khouly; Sohair Ahmed; Thoria El‐Nabarawy; Yousheng Tao
The principal objective of this work was to modify the surface of natural bentonite for enhanced adsorption of cationic dyes. In this regard, novel bentonite/carbon composites were synthesized through two routes. Ferrocene/p‐xylene mixture was used as carbon source through (1) hydrothermal decomposition and (2) spray routes during the calcination of sodium‐bentonite (Na‐B) to deposit carbons on the
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Effects of asphalt emulsion on calcium silicate hydrate gel: Morphology and porosity Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-15 Xiaohui Zeng; Huasheng Zhu; Xuli Lan; Haichuan Liu; Guangcheng Long; Cong Ma
In this paper, calcium silicate hydrate (CSH) gel and calcium silicate hydrate doped with asphalt emulsion (EACSH) were synthesised using Na2SiO3•9H2O, Ca (NO3)2•4H2O, NaOH, deionised water and anionic asphalt emulsion. N2 isothermal adsorption, X‐ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study the effect of asphalt emulsion on morphology and porosity of CSH. The Frenkel–Halsey–Hill
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Modeling and optimization for industrial adipic acid synthesis reactors Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-15 Hui‐Long Wei; De‐Tao Pan; Wei‐Cheng Yan; Zheng‐Hong Luo
Via coupling the mass balance, energy balance, and power law kinetic equations, a tanks‐in‐series reactor model is established to describe the performance of the industrial in‐series stirred‐tank oxidation reactors for adipic acid (AA) synthesis. Industrial‐scale experiments are carried out for model verification, and the satisfactory agreement between the experimental results and calculated data indicates
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Anticorrosive properties and rust conversion mechanism of phytic acid‐based surface tolerant coating Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-15 Hao Xu; Guangming Lu; Shuan Liu; Jibin Pu; Shu Tian; Chunlong Mao; Shanjun Chen
A phytic acid‐based surface tolerant epoxy coating was prepared, and the effect of phytic acid on the corrosion resistance of the composite coating on rusty carbon steel substrate was investigated. The results showed that the low‐frequency impedance modulus of the composite coating on rusty carbon steel could reached 108 Ω·cm2 order of magnitude after immersing for 480 h in 3.5 wt% NaCl solution. Compared
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Separation of middle boiling trace compounds by distillation: An investigation of practical implications of complex column arrangements on an industrial methanol distillation case study Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-14 Isuru A. Udugama; Robert Kirkpatrick; Wei Yu; Krist V. Gernaey; Brent R. Young; Christoph Bayer
The drive to achieve greater energy efficiencies is well‐established in the fine chemical industries with distillation processes being a key focus due to their disproportionate energy consumption totaling more than 40% of the overall plant. The objective of this paper is to specifically focus on the energy efficiency benefits that would be realized by employing intensified distillation column configurations
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Active sites and coke on aluminum sulfate for the rearrangement of propylene oxide Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-06 Baoqiang Zhang; Mengnan Liang; Yingluo Zhu; Weihua Ma
A solid acid catalyst aluminum sulfate was prepared and showed good performance for the propylene oxide rearrangement reaction. The selective adsorption of propylene oxide at different acid sites and the amount of acid sites on the catalyst was studied by the pyridine infrared. The results indicated that the rearrangement of propylene oxide on aluminum sulfate is catalyzed by Lewis acid sites. The
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Synthesis, characterization, and thermal decomposition kinetics of copper hydroxide sulfate (Cu4(SO4)(OH)6) synthesized by chemical precipitation method Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-06 Eda Keleş Güner; Duygu Kancan; Jale Naktiyok; Abdulkadir Özer
In this study, copper hydroxide sulfate (Cu4(OH)6SO4) was synthesized by chemical precipitation using CuSO4 as the precursor material and the first time borax as basic precipitating agent. The synthesized samples were characterized using XRD, FTIR, and SEM. The decomposition kinetics of Cu4(OH)6SO4 were examined by the thermoanalytical procedures. It was obtained from TG‐DTG data that Cu4(OH)6SO4 has
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-05
No abstract is available for this article.
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Effect of copper on textural and acidic properties of hierarchical nanocrystalline ZSM‐5 Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-07-29 Farsana O. P; Prajitha Kumari; Aneesh P
In this work, hierarchically porous nanocrystalline ZSM‐5 was synthesized hydrothermally. Different concentrations of copper were incorporated into the matrix by ion exchange method. The synthesized samples were characterized by means of X‐ray diffraction (XRD), Fourier‐transform infrared (FTIR), energy‐dispersive X‐ray spectroscopy, scanning electron microscopy, X‐ray photoelectron spectroscopy (XPS)
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Effect of aqueous electrolytes on the supercapacitive performance of glycol‐mediated CoFe2O4 nanoparticles Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-07-28 Barkha Rani; Niroj Kumar Sahu
Glycol‐mediated facile solvothermal process for synthesis of mesoporous cobalt ferrite (CoFe2O4) nanoparticles (NPs) is reported. The structure, surface functionalization and morphology of the prepared sample are characterized by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and field emission scanning electron microscope (FESEM). The role
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The effect of silica nanoparticle on thermal, chemical, corrosive, and the nature‐friendly properties of refrigerant compressor lubricants—A comparative study Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-07-28 Subramani Narayanasarma; Biju T. Kuzhiveli
Polyolester (POE) oil and mineral (Min) oil are widely used in household refrigerators as compressors lubricants in India. An experimental calculation on the thermal, chemical, corrosion, and nature‐friendly properties of POE oil and Min oil suspended with silica nanoparticles is conducted for confirming its practicality to adopt in refrigeration compressors as nanolubricant. No surfactants were used
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Microbial fuel cell‐assisted Congo red dye decolorization using biowaste‐derived anode material Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-07 Shalini Prajapati; Pydi Setty Yelamarthi
Microbial fuel cell (MFC) is a promising technology for wastewater treatment coupled with electricity generation. Biowaste‐derived electrodes are used to improve the surface area, roughness, and hydrophilicity, which play pivotal role in the enhanced biofilm formation. In the present study, Ficus religiosa leaves (FRL) biowaste was used to develop the bioelectrode. In this study, Congo red (CR) dye
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Stretching and rupture of a viscous liquid bridge between two spherical particles Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-10-04 Xiangqi Li; Dengfei Wang; Fenglei Huang; Ziqi Cai; Zhengming Gao
In this paper, the stretching and rupture of liquid bridge are studied by experiment and numerical simulation. In the experiment, the relationship between the critical rupture distance of the liquid bridge and four factors, including volume of liquid bridge, particle initial distance, liquid bridge stretching velocity and liquid bridge viscosity, is quantitatively studied. It is found that the liquid
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Issue Information Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-29
No abstract is available for this article.
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Hydrothermal decomposition process of K‐feldspar in NaOH solution Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-24 Changjiang Liu; Hongwen Ma
This work investigates the decomposition of K‐feldspar into analcime under alkaline hydrothermal conditions. Two types of raw materials, potassic syenite powder and microcline crystal lumps, were used for hydrothermal treatment. Research techniques of minerals alteration path simulation, powder decomposition experiments, and specific observations were conducted. Results show that K‐feldspar did not
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Production and characterization of liquid biofuels from locally available nonedible feedstocks Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-10 Abdelrahman B. Fadhil
Mandarin (Citrus reticulata) seeds were exploited as possible nonedible feedstock for the synthesis of liquid biofuels, namely, biodiesel and bio‐oil via alkali–alcoholysis and pyrolysis routes, respectively. The alkali–alcoholysis reaction of mandarin seed oil with an equivalent mixture of methanol–ethanol alcohols was examined and optimized by analysis of variance (ANOVA). The best experimental yield
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Fabrication and analysis of palmitic acid–decanoic acid@Ce–Eu/TiO2 composite as a building material for regulating indoor environment Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-08 Zhifang Zong; Depeng Chen; Chunxiao Zhao; Wei Dong; Gang Tang; Hao Zhang; Xiujuan Zhu
Novel palmitic acid–decanoic acid@Ce–Eu/TiO2 (PA–DA@Ce–Eu/TiO2) microspheres with high photocatalysis–thermal–humidity collaborative performance were prepared via a two‐step method. Ce and Eu were used for codoping to modify the TiO2 hollow microspheres to enhance the photocatalytic properties. Furthermore, a eutectic phase change material (PA–DA) was combined with Ce–Eu/TiO2 hollow microspheres to
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Fouling propensity of pyrolytic coke particles in aqueous phase: Thermal and spectral analysis Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-04 Kobra Pourabdollah
Agglomeration–deposition of pyrolytic coke particles has been assigned as the main concern of fouling formation of olefin units in heat exchangers, vessels, and towers. The aim of this study is to investigate the agglomeration and the fouling propensity of aliphatic‐coated pyrolytic coke particles in the aqueous phase of quench water. Unusual surface properties of pyrolytic coke particles refer back
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Effect of coalbed methane airflow with optimum action concentration on coal oxidation under low temperatures Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-04 Qin Xu; Shengqiang Yang; Wenming Yang; Zongqing Tang; Wanxin Song; Buzhuang Zhou; Kai Yang
To explore the effect of coalbed methane (CBM) airflow on coal oxidation under low temperatures, an experimental apparatus was developed and applied to simulate coal oxidation under different oxidizing atmospheres. The formation of carbon monoxide CO, the index gas, in CBM airflow was analyzed to obtain the optimum concentration of CH4 that exerted the strongest influence on coal oxidation. Then, a
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Energy‐saving process configurations for monoethanolamine‐based CO2 capture system Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-03 Foster Kofi Ayittey; Agus Saptoro; Perumal Kumar; Mee Kee Wong
It is evident from several researches that combining a couple of process modifications is effective in reducing reboiler duty in the chemical absorption‐based carbon capture process. Although extensive works on these combined modifications exist in literature, studies on combined lean vapour compression (LVC) and rich solvent preheating (RSP) are unavailable, despite their potentials as promising energy‐saving
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Robust analytical proportional‐integral‐derivative tuning rules for regulation of air pressure in supply manifold of proton exchange membrane fuel cell Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-01 Ghousiya Begum Kareem; Balasubramanian Ganesan
The core aim of this manuscript is to recommend analytical tuning rules to regulate and control the air supply pressure moving from the supply manifold (SM) to the electrode (cathode) of proton exchange membrane fuel cell (PEMFC). This is done to have an optimal oxygen excess ratio in the fuel cell for enhanced energy generation. The higher order dynamics of PEMFC is approximated to be non‐integer
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Experimental study on ultra‐low NOx emissions from pulverized coal preheating combustion Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-09-01 Yi Zhang; Jianguo Zhu; Qinggang Lyu; Jingzhang Liu; Fei Pan
Realizing ultra‐low NOx emissions during coal combustion is currently a development trend and technical bottleneck of coal combustion technology. To further exploit the low‐nitrogen potentialities in preheating combustion technology, the preheating characteristics, combustion characteristics, and NOx emission characteristics of pulverized coal, after changing operating parameters such as the air equivalence
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Numerical investigation of the performance of 3D‐helical passive micromixer with Newtonian fluid and non‐Newtonian fluid blood Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-28 Sulekh Tokas; Mohammad Zunaid; Mubashshir Ahmad Ansari
Mixing at microscales is purely governed by the diffusion mass transport phenomenon, which is a time‐consuming process requiring a prolonged length of the microchannel to obtain desired results. The present study proposes a novel three‐dimensional helical micromixer (TDHM) with a rectangular cross‐section to achieve splendid mixing performance within a short distance contrary to the simple T‐micromixer
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Visualization research on bubble in overflow sieve plate hot water tower Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-28 Zebin Bao; Yifei Wang; Guangsuo Yu; Fuchen Wang; Huixia Xiao
In this paper, an experimental apparatus was developed based on the evaporating water tower of the circuit bottom‐ash sluicing system. The formation and movement of single bubble that emerged from an orifice with 5 mm diameter in the middle of the tray were investigated by visual experiments, with water flow rates of 150, 200, and 250 L/h−1, steam flow rate of 5 kg/h−1, and nitrogen flow rates of 0
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The effect on ash deposition by blending high‐calcium Zhundong coal with vermiculite: Focusing on minerals transformations Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-26 Haoran Yang; Jing Jin; Dunyu Liu; Fengxiao Hou; Yixuan Hang
To solve the ash deposition problem caused by burning high‐calcium Zhundong coal (ZDC), the addition of vermiculite is a promising solution. However, complete mechanisms of vermiculite addition reducing ash deposition are still unknown. In this paper, the effect of vermiculite on sodium emission, ash fusion characteristics, and mineral transformation is investigated. The results show that although
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The effects of sulfides and sulfur/phosphorus‐containing compounds on coke formation during thermal cracking of light naphtha Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-25 Xudong Ding; Zhiyuan Wang; Boyan Wang; Zhihong Xing
In this study, coke deposits during thermal cracking of light naphtha in the presence of sulfur‐ and sulfur/phosphorous‐containing compounds with different addition methods were investigated from the points of morphology and structure. Sulfur/phosphorous‐containing compounds were applied by continuous addition, pretreatment, and pretreatment followed by continuous addition. As for continuous addition
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On modelling of glucose transport in hollow fibre membrane bioreactor for growing three‐dimensional tissue Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-21 Hazwani Suhaimi; John Peter Ward; Diganta Bhusan Das
Hollow fibre membrane bioreactors (HFMBs) have been shown to overcome the diffusion limitation of nutrients (e.g., glucose) from the hollow fibres (lumens) to the porous regions of a scaffold (extracapillary space). However, direct monitoring of glucose diffusion inside the HFMBs is almost impossible because of their small size; thus, various computational modelling frameworks have been developed in
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Mathematical model of thermal storage catalytic combustion process of ethyl acetate on platinum/palladium molecular sieve support reaction system Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-20 Haichao Jiang; Yaping Kang; Huan Chen; Yiqing Chen; Wenbo Wang; Xiangjing Zhang; Shanlin Qiao; Yongqi Hu
This work focused on the mathematical model establishment and accurately forecast the conditions of thermal storage catalytic combustion about ethyl acetate, using platinum/palladium molecular sieve support reaction system. According to the physical properties of ethyl acetate and the mass transfer and continuity equations, a mathematical model was established using FORTRAN programming. The mathematical
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The copper ion reduction and oxidation cycle during the cathodic process of gold thiosulfate leaching Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-18 Canyu Zhang; Qiang Wang; Yanhe Nie; Zhiguo Han; Yifan Su
The copper ion reduction and oxidation cycle during the cathodic process of gold thiosulfate leaching was studied using a rotating disc electrode and cyclic voltammetry, and the dynamic characteristics of the system were discussed. In a copper ammonium solution, the redox reactions of were reversible and controlled by substance diffusion. The rotating disc electrode and the reduction method with a
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Preparation and characterization of sodium thiosulfate pentahydrate/expanded graphite phase change energy storage composites Asia Pac. J. Chem. Eng. (IF 1.06) Pub Date : 2020-08-12 Mengyao Lu; Xuelai Zhang; Jun Ji; Yongyichuan Zhang
In order to solve the problems of high supercooling, poor thermal conductivity and phase separation after repeated use of Na2S2O3·5H2O with additives. In this paper, Na2S2O3·5H2O is used as the matrix phase change material, and 1% sodium carboxymethyl cellulose, 3% SrCl2·6H2O, and 10% expanded graphite (EG) are added to prepare the modified Na2S2O3·5H2O composite phase change energy storage material