Design and preparation of high-surface-area Cu/ZnO/Al2O3 catalysts using a modified co-precipitation method for the water-gas shift reaction

Authors:  Adeline Budiman, Muhammad Ridwan, Sung Min Kim, Jae-Wook Choi, Chang Won Yoon, Jeong-Myeong Ha, Dong Jin Suh, Young-Woong Suh

Abstract:
Highly dispersed Cu/ZnO/Al₂O₃ catalysts were prepared by modifying a conventional co-precipitation method. By manipulating the preparation conditions, in this case solvent, precipitating temperature, and pH, a Cu surface area of 45.5 ± 1.7 m²/g was prepared, which was much greater than the surface area of 11.4–31.7 m²/g obtained by the conventional co-precipitation method and seemed to be the largest Cu surface area ever reported in the literature. The preparation of catalysts with a high Cu surface area was attributed to the formation of aurichalcite, a complex containing Cu and Zn. The catalysts prepared by the modified co-precipitation method were used for a water-gas shift reaction, exhibiting higher catalytic activity compared to those prepared by the conventional co-precipitation method.

Keywords:
Cu/ZnO/Al₂O₃
Water-gas shift
Co-precipitation
Aurichalcite
Ethylene glycol

Published in: Applied catalysis A: General  (Volumes 462–463, Pages 1-310, 10 July 2013)

Publisher: Elsevier      

ISSN Information: 0926-860X

Design and preparation of high-surface-area Cu/ZnO/Al2O3 catalysts using a modified co-precipitation method for the water-gas shift reaction

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