Open AccessHydrogenation of CO2 over Alkali Metal-Modified Ni/Al2O3 Catalysts
Author(s) -
J. Ryczkowski,
T. Borowiecki
Publication year - 1998
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749801600908
Subject(s) - methanation , catalysis , nickel , alkali metal , selectivity , inorganic chemistry , lithium (medication) , metal , materials science , chemistry , nuclear chemistry , metallurgy , organic chemistry , medicine , endocrinology
A group of Ni and Ni, Li/Al 2 O 3 catalysts were prepared using impregnation and controlled surface reaction methods. The various steps in the preparation were characterised by IR spectroscopy. The catalysts were reduced under the same conditions, while fixed conditions were also employed for the subsequent reactions in order to effect a better comparison. The total and metal surface areas, the degree of nickel reduction and the activity of the catalysts towards CO 2 methanation were all measured in order to compare the effect of preparation method on the structural properties as well as on the catalyst activity and selectivity. Nickel catalysts modified with lithium, either by controlled surface reaction or double impregnation utilising H 2 Li 2 EDTA, exhibited a higher activity in CO 2 methanation than any other catalyst samples investigated.