Published in Korean Journal of Chemical Engineering
Passive direct methanol fuel cells (DMFC) are applicable for charging portable electronic devices. In passive DMFC, fuel and oxidants are supplied through diffusion and natural convection process. The present experimental work analyzed the effect of the membrane electrode assembly (MEA) activation, methanol concentration, bolt tightening torque and...
Published in Korean Journal of Chemical Engineering
This study investigated imidazolium ionic liquids’ capability under ultrasonic irradiation conditions for dysprosium extraction from the aqueous nitrate solution. The main objective was to evaluate the feasibility of ultrasound-assisted extraction techniques compared to conventional solvent extraction. The extraction process was investigated as a f...
Published in Korean Journal of Chemical Engineering
The precipitation efficiency of paclitaxel from Taxus chinensis was remarkably improved through negative pressure cavitation fractional precipitation. When paclitaxel was precipitated under a negative pressure of −200 mmHg, almost all of the paclitaxel (
Published in Korean Journal of Chemical Engineering
In an effort to protect surface and groundwater supplies from contamination, to assess the risk of microbial groundwater contamination and for the purpose of soil bioremediation, considerable efforts have been made to investigate biocolloid transport and retention in porous media. The current work provides an introductory overview of biocolloid tra...
Published in Korean Journal of Chemical Engineering
Perfluoropropyl vinyl ether (PPVE) and perfluoroisopropyl vinyl ether (PIPVE) are used for plasma etching of SiO2 contact holes. When etching is performed on blanket SiO2 samples, the etch rates in the PPVE/Ar plasma are higher than those in the PIPVE/Ar plasma at all bias voltages. In contrast, when hole-pattern (100 nm in diameter) SiO2 samples a...
Published in Korean Journal of Chemical Engineering
The aim of this study was to adsorb Ca, K, Mg and Na from seawater using sulfonated cornstalk. Cornstalk, a ligno-cellulose derived agricultural waste, was selected as an adsorbent. It was separated into the inside and outside and then sulfonated to be used as an adsorbent. Sulfonated cornstalk has higher ion exchange capacity than natural cornstal...
Published in Korean Journal of Chemical Engineering
Processed gas streams from the water gas shift reactor (WGSR) are enriched with CO2 and H2. Purification of H2 from CO2 for different applications is required because of its environmental and economic benefits. Among different separation technologies, membrane technology gets much attention due to its various advantages. In this work, cellulose ace...
Published in Korean Journal of Chemical Engineering
The use of highly efficient, environment-friendly and economically inexpensive materials for the adsorption removal of contaminants from water has always been considered as emerging task. In this study, we synthesized hybrid tri-metallic nickel cobalt layered double hydroxide (NiCoAl-LDH) porous material for the adsorption removal of Eosin yellow (...
Published in Korean Journal of Chemical Engineering
Activated carbon (AC) was produced from date seeds by a calcination process at 700 °C for 2 h and then its surface was improved with CaO and magnetic nanoparticles. AC/CaO/Fe3O4 nanocomposite was then employed to remove formaldehyde ions from aqueous media. The structural characteristics of the materials were completely studied through FT-IR, XRD, ...
Published in Korean Journal of Chemical Engineering
The extraction of CO2 from ambient air, or direct air capture (DAC), is a crucial negative CO2 emissions technology with great potential for contributing to the mitigation of global warming and climate change. However, nearly all published research on DAC has been conducted under indoor temperature conditions: 20 to 30 °C. In contrast, the future g...
