Preparation of Cu-ZnO Catalyst by Microchannel Reactor
1. College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
2. State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China
Abstract：The Cu-ZnO catalysts were prepared by both microchannel reactor and classical co-precipitation to investigate the impact of flow mixing pattern on the catalysts’ structure and performance and used for methanol synthesis from syngas. It was found that the catalyst prepared by microchannel reactor showed a higher catalytic activity than whose prepared by classical co-precipitation. The transmission electron microscope and BET characterizations showed that the catalysts prepared by microchannel reactor had a narrower distribution, smaller particle size and larger specific surface area. Through the analysis of reaction process, we believe that is because the precipitation reaction condition is more homogeneous and it can avoid the possible backmixing in the microchannel reactor. The X-ray diffraction and H2-temperature program reduction results indicated that the catalyst prepared by microchannel reactor had a higher degree of crystallization and more active Cu structures. All these properties made it possible to present a higher activity and methanol selectivity in the CO hydrogenation reaction.
