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Investigation on Deactivation of Cu/ZnO/Al2O3 Catalyst for CO2 Hydrogenation to Methanol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-05-17 , DOI: 10.1021/acs.iecr.9b01546 Binglian Liang 1, 2 , Junguo Ma 1 , Xiong Su 1 , Chongya Yang 1, 2 , Hongmin Duan 1 , Huanwen Zhou 3 , Shaoliang Deng 3 , Lin Li 1 , Yanqiang Huang 1, 4
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-05-17 , DOI: 10.1021/acs.iecr.9b01546 Binglian Liang 1, 2 , Junguo Ma 1 , Xiong Su 1 , Chongya Yang 1, 2 , Hongmin Duan 1 , Huanwen Zhou 3 , Shaoliang Deng 3 , Lin Li 1 , Yanqiang Huang 1, 4
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The catalytic performance of Cu/ZnO/Al2O3 (CuZnAl) catalyst for CO2 hydrogenation to methanol was investigated over a period of 720 h time-on-stream, which showed that the space time yield of CH3OH was decreased by 34.5% during the long-term testing. Different characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), and N2O adsorption experiments, were applied to study the deactivation reasons. XRD and N2O adsorption experiments indicated that there were no obvious changes in Cu particle size after the CuZnAl catalyst was exposed to reaction atmosphere for 720 h, while agglomeration took place on ZnO particles. XPS results revealed that part of the metallic Cu was oxidized to Cu2+. The CuZnAl catalyst deactivation was proved to be due to the comprehensive effect of Cu oxidation and ZnO species agglomeration during CO2 hydrogenation to methanol.
中文翻译：
用于CO2加氢制甲醇的Cu / ZnO / Al2O3催化剂的失活研究
研究了Cu / ZnO / Al 2 O 3（CuZnAl）催化剂在720 h的运行时间内对CO 2加氢制甲醇的催化性能，结果表明，CH 3 OH的时空产率降低了。在长期测试中占34.5％。应用不同的表征技术，包括X射线衍射（XRD），扫描电子显微镜，高分辨率透射电子显微镜，X射线光电子能谱（XPS）和N 2 O吸附实验，来研究失活的原因。XRD和N 2O吸附实验表明，CuZnAl催化剂暴露于反应气氛720 h后，Cu粒径没有明显变化，而ZnO颗粒发生团聚。XPS结果表明，部分金属Cu被氧化为Cu 2+。事实证明，CuZnAl催化剂失活是由于在CO 2加氢制甲醇过程中Cu氧化和ZnO团聚的综合作用所致。
更新日期：2019-05-23
中文翻译：
用于CO2加氢制甲醇的Cu / ZnO / Al2O3催化剂的失活研究
研究了Cu / ZnO / Al 2 O 3（CuZnAl）催化剂在720 h的运行时间内对CO 2加氢制甲醇的催化性能，结果表明，CH 3 OH的时空产率降低了。在长期测试中占34.5％。应用不同的表征技术，包括X射线衍射（XRD），扫描电子显微镜，高分辨率透射电子显微镜，X射线光电子能谱（XPS）和N 2 O吸附实验，来研究失活的原因。XRD和N 2O吸附实验表明，CuZnAl催化剂暴露于反应气氛720 h后，Cu粒径没有明显变化，而ZnO颗粒发生团聚。XPS结果表明，部分金属Cu被氧化为Cu 2+。事实证明，CuZnAl催化剂失活是由于在CO 2加氢制甲醇过程中Cu氧化和ZnO团聚的综合作用所致。
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