• bimetallic co-fe nanocrystals deposited on sba-15 and hms mesoporous silicas as catalysts for fischer–tropsch synthesis

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     fischer–tropsch synthesis (493 k, 0.62 mpa co, 1.24 mpa h2) has been performed over monometallic and bimetallic co and/or fe clusters deposited on mesoporous silicas (hms and sba-15). catalysts have been prepared by incipient wetness impregnation and characterized by n2 adsorption–desorption isotherms, x-ray diffraction (xrd), h2-temperature programmed reduction (h2-tpr), and transmission electron microscopy (tem). hms supported co-fe catalyst showed the highest activity and c5+ hydrocarbon selectivity, while co-fe/sba-15 catalyst revealed the highest selectivity to alcohols. both bimetallic catalysts were more active toward the c2–c4 hydrocarbon fraction, with an enhancement in the selectivity to c2double bond; length as m-dash, c3double bond; length as m-dash and 1-c4double bond; length as m-dasholefins. both bimetallic catalysts showed greater chain growth probability values than the monometallic iron based catalysts although their performance in catalytic tests were more close to the iron catalyst.

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