FORMATION OF ACTIVE SITES ON IRON CATALYST
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概要
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Fischer-Tropsch synthesis over preliminary carburized iron catalyst with CO was investigated in both isothermal and temperature programmed experiments under atmospheric pressure. In comparison with the freshly reduced catalyst, the pre-carburized catalyst showed similar activity for the formation of hydrocarbons at the steady state and shorter period of activation which decreased with the degree of carburization. The pre-carburization was observed to reduce the strength and to raise the amount of the CO adsorption. Since no significant differences were observed between the carburizations with CO/He and CO/H_2, it was confirmed that the role of the carburization during synthesis was not the formation of reaction intermediates but the development of the active surface available for catalysis.
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