金属鉄およびニッケル触媒による水性ガスシフト反応の反応速度

概要

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An attempt was made to clarify the reaction mechanism and to determine the rate parameters for water gas shift reaction with solid metal as catalyst. For the reaction, the influence of gaseous adsorption on the surface of metal catalyst played an important role. In the present work, both lumpy iron and spherical nickel were used as catalysts and the rate of water gas shift reaction was observed at pressure range of 0.13 to 1.01 MPa. Adsorption of gas species was experimentally found to surpress the reaction. The rate equation of water gas shift reaction was derived on the basis of the Temkin's adsorption theory as follows : -γ_<CO_2>=k_<app> (p_<CO_2>p_<H_2>-p_<CO>p_<H_2O>/K)/p^m_<CO_2>p^n_<H_2> The parameters of k_<app>, m and n in the above equation were determined from the results of experiments. Calculated values based on the rate equation agreed well with observed data. The order of catalytic activity of various catalysts at 873K in the basis of unit area and unit time was found as follows : Lumpy iron>Spherical nickel>Reduced iron pellet (reduced at 1273K by hydrogen)
社団法人日本鉄鋼協会の論文
1991-10-01