文献类型：期刊文献

英文题名：Discrimination of methanol desorption resistance relative to the reaction steps in presence of supercritical n-hexane

作者：Wu, Si-Cao[1];Cheng, Zhen-Min[1];Liu, Peng[1];Luo, Wen[1];Zhou, Zhi-Ming[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：95

起止页码：267

外文期刊名：CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION

收录：;EI(收录号：20152801028846);WOS:【SCI-EXPANDED(收录号:WOS:000361258100031)】；

基金：Financial supports from the National Natural Science Foundation of China (21076072) and the Fundamental Research Funds for the Central Universities are gratefully acknowledged.

语种：英文

外文关键词：Methanol synthesis; Kinetics; Catalysis; Supercritical fluid; Desorption

摘要：To experimentally study the effect of supercritical fluid on product desorption, methanol synthesis from CO/CO2/H-2 over the Cu/ZnO/Al2O3 catalyst was conducted in the solvents of liquid paraffin, supercritical n-hexane, and their mixture. For the catalyst size of 0.15 mm at which the internal mass transfer resistance was negligible, methanol yields of 10% in n-paraffin and 18% in supercritical n-hexane were obtained respectively. From the conversion rates of CO2 at different n-hexane pressures, the resistance ratio of CO2 hydrogenation to methanol desorption was obtained to vary from 1:2.85 to 1:0.75 when n-hexane partial pressure was increased from 0 to 4.0 MPa. Furthermore, the resistance ratio of the consecutive steps of water-gas shift reaction (WGSR), CO2 hydrogenation and methanol desorption were then evaluated with respect to CO as the reactant. It shows the resistance ratio of the three steps varies from 0.77:1:2.82 to 0.75:1:0.75 when n-hexane partial pressure was increased from 0 to 4.0 MPa. (C) 2015 Elsevier B.V. All rights reserved.