Adsorption and Reaction Behavior of F-T Co catalysts Supported by Chemically-modified Alumina

Abstract

Abstract: The influence of chemically-modified alumina on the adsorption and reaction behavior of Co catalysts was investigated by in situ FTIR, TPSR and Fischer-Tropsch synthesis. The adsorption of CO was determined by the alumina support treated in acid/base media. For the Co catalyst supported onto the ammonia-modified alumina, more bridged-form CO appeared, while the linear-form CO for the acetic acid-modified alumina was dominant. The bridged-form CO mostly participated in CO hydrogenation. CO hydrogenation showed that the Co catalyst supported onto the ammonia-modified alumina favored to increase the catalytic activity and C₅⁺ selectivity, and however, the Co catalyst supported onto the acetic acid-modified alumina suppressed the activity and the carbon chain growth.

Key words: Co/Al₂O₃ catalyst, Chemical modification, Acid/base media, In situ FTIR, CO hydrogenation

CLC Number:

O643.3

TrendMD:

ZHANG Jun-Ling, CHEN Jian-Gang, DONG Qing-Nian, REN Jie, SUN Yu-Han. Adsorption and Reaction Behavior of F-T Co catalysts Supported by Chemically-modified Alumina[J]. Chem. J. Chinese Universities, 2003, 24(2): 301.

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Adsorption and Reaction Behavior of F-T Co catalysts Supported by Chemically-modified Alumina

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