The catalytic hydrolysis of soybean oil was used as an alternative for the production of monoglycerides (MG) and diglycerides (DG). The reactions were conducted in a stainless steel tubular reactor for temperature ranges of 240–290 °C, on niobium phosphate (NBP) and niobium oxide (NBO) catalysts. In the hydrolysis reactions at 270 °C the maximum selectivities of the products of interest were obtained

In this work, HZSM‐5 zeolite was synthesized using n‐butylamine as a template under hydrothermal conditions. The prepared samples were carefully characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), pyridine‐adsorbed Fourier transform infrared spectra (Py‐FTIR) and ammonia temperature‐programmed desorption (NH3‐TPD) techniques. The morphology

Disperse dyes are poorly water‐soluble and difficult to stably disperse in an aqueous medium, which greatly limits their application in dyeing synthetic fibers. The micronization can solve this problem. Herein, we present a facile way to prepare stable aqueous nanodispersions of disperse dye (C.I. disperse yellow 54) by combining high‐gravity antisolvent precipitation in a rotating packed bed (RPB)

The mass transfer parameters of both gas and liquid phases affect the mass transfer flux of CO2 in absorption processes. In this study, an accurate correlation was proposed to calculate CO2 mass transfer flux in an absorption‐reactive process by methyldiethanolamine (MDEA) solution using the Buckingham π theorem. The various parameters include film parameter, CO2 loading, concentration ratio, partial

This paper investigates methanol production through CO2 hydrogenation in a series of fixed bed reactors. Staging of the reactor into several smaller reactors is considered to enhance methanol production in addition to maximize a measure of annual profit. The degrees of freedom of the reactor system are the number of stages, cooling medium temperature, heat transfer area, and volume of stages.

To solve the problem of coke powder entrainment towards the main fractionator in delayed coking unit, an open scrubbing tower can be installed instead of filtration. Based on particle scavenging model, a gas‐liquid‐solid three phase numerical method was adopted to simulate the process of particle removal. Besides, the effects of the particle size, droplet size, gas velocity and droplet flow rate are

The purpose of this study is the production and optimization of polycaprolactone nanoparticles (PCL NPs) in terms of the particle size, polydispersity index (PDI), and zeta potential based on a liquid non‐solvent nanoprecipitation process using flow focusing microfluidic device. The effects of different parameters such as flow rate ratio (FRR), total flow rate (TFR), the organic solvents of tetrahydrofuran

A combined approach for the extraction of antioxidant from Hibiscus sabdariffa and entrapment of extract into zein nanoparticles was proposed. Different green extraction techniques were adopted: high pressure and temperature extraction, ultrasound‐assisted extraction and microwave‐assisted extraction using an ethanol‐water mixture as extracting solvent. The extracts were used for the preparation of

No abstract.

In chemical process engineering, fast gas‐liquid reactions often suffer from an inefficient distribution of gas and therefore mixing and mass transfer performance. This study deals with the possibility of influencing the local gas holdup and bubble size distribution in a gas‐liquid process using additively manufactured lattice structures (AMLS). The diameter of the vertically oriented and structured

The amine‐based post‐combustion carbon capture process is one of the most efficient methods for treating large‐scale CO2, but produces hazardous products such as nitrosamines, nitramines, and NH3 due to the chemical transition and degradation of the absorbents. Nitrosamines and nitramines, which are harmful to humans, can be treated with a washing tower, but such treatment has a limited effect on the

In this study, four imidazolium‐based ionic liquids (ILs) were selected to investigate the inhibiting effect of ILs with various alkyl chain lengths on the corrosion of mild steel in H2S and HCl solution using electrochemical experiments, weight loss experiment, surface analysis, and quantum chemical study. The results showed that these ILs acted as mixed‐type inhibitors and efficiently inhibited the

Activated carbon nanofibers (ACNFs) is a relatively new modified structure of carbon‐based adsorbent that have the ability to adsorb carbon dioxide (CO2) due to its high specific surface area (SSA), wide distribution of porous structure as well as high volume of active sites. In this study, cost‐effective agricultural waste based‐ graphene were synthesized from rice husk ashes (GRHA) has been used

Corona treatment of Eosin Y contaminated water with the use of a dielectric material that covers the ground electrode to avoid spark discharge (causing erosion), reduce charge leakage and improve electric field (as stored electrons and charges) was investigated. The gas phase discharge above liquid surface to eliminate the organic pollutant, through a form of point to plate, by utilizing several needles

The paper provides techno‐economic analysis of biogas plant with in‐built algae production. The degradation occurs in fermenter with mesophilic conditions, to have 605 Nm3 t‐1TS of biogas and 343 Nm3 t‐1TS of methane after 50 days. The biogas is combusted in combined heat and power unit to produce heat and electricity. Cultivation of Chlorella vulgaris is done in co‐annular photo bioreactors, with

No abstract.