Sponsor(s): Chemical Industry and Engineering Society of China; Chemical Industry Press
12 issues per year
Current Issue: Issue 12, 2020
CIESC Journal is supervised by China Association for Science and Technology and sponsored by Chemical Industry and Engineering Society of China, and Chemical Industry Press. The predecessor of the journal is Journal of China Chemical Industry Association launched in 1923 and Chemical Engineering launched in 1934. The journal aims at reflecting the major achievements of fundamental research and application in chemical and engineering and other related fields, as well as new technologies and methods. Its scope covers thermodynamics, separation engineering, process system engineering, bio-engineering and chemical engineering, energy and environmental engineering, material chemical engineering and nanotechnology, and modern chemical technology. The journal is included in CA, JST, Pж(AJ), EI, CSCD.
Director: Zhao Yingli
CIESC Journal,2020,Vol 71,No. 12
To obtain high-performance gas separation membranes and realize high-efficiency separation and recovery of CO 2/N 2 in flue gas, the amino-rich semi-interpenetrating network blend membranes were prepared by in-situ crosslinking reaction, which provided CO 2 transport channels and affinity sites. Sulfonated poly(ether ether ketone)(SPEEK) and polysuccinimide (PSI) were used as raw materials, and hexamethylenediamine was crosslinking agent. The structure of the blend membranes was characterized by Fourier-transform infrared spectroscopy. The effects of water content, PSI dosage, and feed gas pressure on the gas separation performance were studied, and the gas separation performance and the long-time stability were investigated under mixed gas conditions. The results showed that SPEEK and PSI had good compatibility, and there was a strong interaction between them, which exhibited the semi-interpenetrating network microstructure in the membranes. When the PSI loading was 60% (mass), the CO 2 permeability of pure gas and mixed gas were 652 and 601 Barrer, respectively, and the corresponding CO 2/N 2 selectivity was 67.6 and 60.3, which was better than that in pristine SPEEK membrane, surpassing 2008 Robeson upper bound. The CO 2 permeability and CO 2/N 2 selectivity were still stable after 360 h durability test of SPEEK/PSI-60 blend membrane. This is mainly due to the formation of the amino-rich semi-interpenetrating network microstructure between SPEEK and PSI, which not only provides carriers facilitating CO 2 transport, but also enhances the water retention performance of the blend membranes and forms a large number of CO 2 transport water channels.
CIESC Journal,2020,Vol 71,No. 12
To solve the problem that the hydrogen partial pressure in the anaerobic fermentation system limits the hydrogen diffusion rate among species, porous metal materials derived from the metal-organic framework ZIF-8 are used to promote the anaerobic fermentation of ethanol to produce methane, and the mechanism for enhancing the electron transfer between microorganism species is explored. Scanning electron microscopy shows that ZIF-8 derived porous carbon plays a role in immobilizing microbial communities and promotes nanowires generation. The results show that the methane yield and the maximum methane production rate increase with an increase in ZIF-8 derived porous carbon addition. When 200 mg/L ZIF-8 derived porous carbon is added, the system conductivity increases by 3.58-fold. Moreover, three-dimensional excitation–emission matrix (3D-EEM) fluorescence spectroscopy analysis showed that ZIF-8 derived porous carbon promotes the relative content of fulvic acid in extracellular polymeric substances (EPS) from 18.0% to 23.6%, corresponding to methane yield and maximum methane production rate increasing by 18.81% and 19.04%, respectively.