文献类型：期刊文献

中文题名：Deactivation and regeneration of the commercial Cu/ZnO/Al_(2)O_(3) catalyst in low-temperature methanol steam reforming

作者：Didi Li[1];Zhen Wang[1];Shiqing Jin[1];Minghui Zhu[1]

机构：[1]State Key Laboratory of Chemical Engineering,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2023

卷号：66

期号：12

起止页码：3645

中文期刊名：Science China Chemistry

外文期刊名：中国科学（化学英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：sponsored by the National Natural Science Foundation of China (22078089);the Program for Professor of Special Appointment (Eastern Scholar)at Shanghai Institutions of Higher Learning;Shanghai Sailing Program (19YF1410600)。

语种：英文

中文关键词：methanol steam reforming;Cu/ZnO/Al_(2)O_(3)catalyst;deactivation;regeneration

摘要：Cu-based catalysts with excellent activity at low temperatures are widely used for methanol steam reforming(MSR)but suffer from deactivation problems.The present work aims to elucidate the deactivation and regeneration mechanisms of the commercial Cu/ZnO/Al_(2)O_(3) catalyst in low temperature MSR.By employing a series of(quasi)in situ characterization methods,it is found that the deactivation of the catalyst at a high weight hourly space velocity(WHSV)and a low reaction temperature is mainly due to the poisoning of Cu species associated with surface-oxygenated species with less Cu sintering,rather than carbon deposition,and strong metal-support interaction(SMSI).An in situ regeneration method was developed for the deactivated commercial Cu/ZnO/Al_(2)O_(3) catalyst via the simultaneous supply of O_(2).It is shown that the addition of O_(2)(≥1 vol%)can reverse the deactivation caused by surface-oxygenated poisoning due to the weak interaction between formed surface copper oxide and surface-oxygenated species,facilitating their desorption,but not deactivation caused by sintering,thereby partially restoring the catalytic activity.