Effects of Temperature on Adsorption Behavior of Synthesis Gas and  Stability  for Co/SiO2 as Catalyst in Fischer-Tropsch Synthesis

Chem. J. Chinese Universities

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Effects of Temperature on Adsorption Behavior of Synthesis Gas and Stability for Co/SiO₂ as Catalyst in Fischer-Tropsch Synthesis

ZHOU Wei, FANG Ke-Gong, CHEN Jian-Gang, SUN Yu-Han*

1. State Key Laboratory of Coal Conversion, Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Received:2005-08-01 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
Contact: SUN Yu-Han

Abstract

Abstract: The effects of temperature on adsorption behavior of synthesis gas and stability for Co/SiO₂ catalyst in FischerTropsch synthesis(FTS) were studied by using FTIR, TPSR, XRD, BET, HTPD and TPR technologies. It was found that the CO adsorption was active on the surface of the catalyst and that was still stable at 270 ℃. With the reaction temperature increasing, the main reaction changed from the CO hydrogenation reaction to the Boudouard reaction, and the latter became overwhelming beyond 350 ℃. Besides, cobalt sintering became more evident accompanied with the formation of cobalt silicates and/or hydrosilicates species on the catalyst with the increase of the reaction temperature. It was also proved that sintering was the dominant reason for the catalyst deactivation at higher reaction temperature.

Key words: Fischer-Tropsch synthesis, Co/SiO₂, CO adsorption, Boudouard reaction, Sintering

CLC Number:

O643

TrendMD:

ZHOU Wei, FANG Ke-Gong, CHEN Jian-Gang, SUN Yu-Han*. Effects of Temperature on Adsorption Behavior of Synthesis Gas and Stability for Co/SiO₂ as Catalyst in Fischer-Tropsch Synthesis[J]. Chem. J. Chinese Universities, doi: .

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Effects of Temperature on Adsorption Behavior of Synthesis Gas and Stability for Co/SiO₂ as Catalyst in Fischer-Tropsch Synthesis

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