1193a.    -----------------.  [GHOSH, J. C., SASTRI, M. V. C., AND KINI, K. A.] Adsorption of Hydrogen and Carbon Monoxide and Their Mixtures by Cobalt Fischer-Tropsch Catalysts.  Ind. Eng. Chem., vol. 44, 1952, pp. 2,463-2,470.

         In order to gain an insight into the nature of the reactive substrate in Fischer-Tropsch synthesis, the adsorption of H2 and CO was studied at various temperatures from the pure gases as well as from their mixtures on 2 Co catalysts, 1 of which contained Cr2O3 as a promoter.  Both gases underwent activated adsorption at fairly low temperatures.  Cr2O3 enhanced the amounts and rates of adsorption of both, lowered their activation energies of adsorption, and thus acted as a promoter.  Experiments were conducted with 1CO+1H2 and 1CO+2H2 mixtures, using a thermal conductivity meter for analysis.  The adsorption of each constituent was found to be markedly influenced by the presence of the other.  Kinetic studies revealed that the high initial adsorption of H2 was followed by a partial replacement of adsorbed H2 by CO.  Near the minimum temperature of appreciable reaction, the concurrent adsorptions of CO and H2 increased with the partial pressures in the ratio of 2CO:1H2.  The observations reported in this paper point to the formation of chemisorbed CO-H2 complexes as 1 of the 1st steps in the transformation of the substrate.  The results are also in correlation with reaction-performance data previously reported on these catalysts.