The effect of potassium on CO disproportionation on Ni/Al2O3 catalyst

Authors: Jerzy Zieliński, Leszek Znak, Zbigniew Kaszkur

Abstract:
The effect of potassium on CO disproportionation on Ni/Al₂O₃ catalyst was studied. The examinations showed that small potassium content, below 1.5 mol%, does not affect the reaction rate while large potassium content, 6.0 mol%, slightly hinders the reaction. Carbon deposits produced during the disproportionation were studied by TP hydrogenation method. The measurements showed that: (i) the deposit formed on unpromoted sample is easy to hydrogenate and consists of adsorbed carbon atoms while (ii) the deposits formed on potassium promoted samples are difficult to hydrogenate and consist of co-adsorbed C atoms and CO molecules, being in intimate contact with potassium. 

Keywords:
Nickel catalyst
CO disproportionation
Effect of potassium

Published in: Applied catalysis A: General  (Volumes 460–461, Pages 1-132, 10 June 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

The effect of potassium on CO disproportionation on Ni/Al2O3 catalyst

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