期刊
CATALYSIS LETTERS
卷 146, 期 5, 页码 1011-1017出版社
SPRINGER
DOI: 10.1007/s10562-016-1712-y
关键词
Thermal desorption; TPD; Hydrogenation; Copper; Chemisorption
The desorption kinetics of hydrogen from a polycrystalline Cu/ZrO2 catalyst was investigated under atmospheric pressure using temperature-programmed desorption (TPD) experiments in a microreactor set-up. Different heating rates were applied under equal conditions with a carefully reduced catalyst. The hydrogen TPD peaks were symmetric and centered slightly above 300 K indicating associative desorption of H-2 from metallic Cu. Using heating rate variation, the kinetic parameters and were determined to be 1.24 x 10(9) s(-1) and 68 kJ mol(-1), respectively. As the modeling with constant values of and yielded signals which were too narrow, dependence of on coverage was introduced applying . By application of the full-analysis method an optimal fit to the experimental data was found. Setting n = 1 resulted in the best fit and a value of 61 kJ mol(-1) - (6.25 kJ mol(-1) x ) for was determined.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据