甲醇
催化作用
材料科学
化学工程
铜
冶金
化学
有机化学
工程类
作者
Oh‐Shim Joo,Kwang‐Deog Jung,Sang Woo Han,Sung‐Jin Uhm
出处
期刊:Elsevier eBooks
[Elsevier]
日期:1994-01-01
卷期号:: 93-101
标识
DOI:10.1016/b978-1-85573-799-0.50015-7
摘要
Several copper catalysts were prepared, characterized, and tested for hydrogenation of CO 2 to produce methanol. The copper atoms in the Cu/ZnO catalyst occupy 24-33% of the surface area whereas only 5-15% of the copper in the Cu/Al 2 O 3 catalyst is on the surface of the catalyst by changing their mole ratio from 3:1 to 1:2. The surface area of Cu/Al 2 O 3 catalysts was three to four times larger than that of Cu/ZnO. Presence of Al 2 O 3 in the catalyst increased the maximum H 2 TPR peak about 30° higher than that of copper oxide only. Meanwhile, the presence of ZnO in the catalyst decreased the TPR maximum peak of Cu/ZnO about 20° lower than copper oxide only and resulted in high energy state of copper ion. TON (turnover number) of Cu/ZnO for methanol synthesis from CO 2 /H 2 gas was higher than that of Cu/Al 2 O 3 The methanol selectivity of Cu/Al 2 O 3 catalyst was slightly higher than that of Cu/ZnO. The conversion of CO 2 was proportional to surface area of copper. TON per copper atom.h for CO 2 hydrogenation increased as copper content decreased.
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