氧化铝负载钯催化剂上CO还原NO的研究

H. Muraki, H. Shinjoh, Y. Fujitani
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引用次数: 19

摘要

研究了Pd/Al/sub 2/O/sub 3/催化剂上CO还原NO的动力学。这些研究还补充了脉冲反应、瞬态响应法和TPD。钯催化剂的性能主要受NO/CO比和反应温度的影响。结果表明,在NO/CO的化学计量比下,N/sub /O选择性最小。在350/sup 0/C下,NO转化率低于20%时,Pd催化剂上NO还原和N/ sub2 /和N/ sub2 /O生成的动力学在NO中为一级,在CO中为反一级,其动力学和产物选择性与以NO的化学吸附为限速步骤的机理一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reduction of NO by CO over alumina-supported palladium catalyst
The kinetics of NO reduction by CO have been investigated over a Pd/Al/sub 2/O/sub 3/ catalyst. These studies have been complemented by pulse reaction, transient response method, and TPD. The performance of the Pd catalyst depended strongly on the ratio of NO/CO and the reaction temperature. It was shown that the N/sub 2/O selectivity was minimum at the stoichiometric ratio of NO/CO. For NO conversion below 20% at 350/sup 0/C, the kinetics for NO reduction and N/sub 2/ and N/sub 2/O formation over Pd catalysts were first order in NO and inverse first order in CO. The kinetics and product selectivity were found to be in good agreement with a mechanism based on the chemisorption of NO as the rate-limiting step.
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