Influence of Fe2O3 crystal phase on the performance of Fe-based catalysts for CO2 hydrogenation

CHEN Hong-xian; NING Wen-sheng; CHEN Chun-hua; ZHANG Tian

Volume 43 Issue 11

Nov. 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(11): 1387-1392

CHEN Hong-xian, NING Wen-sheng, CHEN Chun-hua, ZHANG Tian. Influence of Fe2O3 crystal phase on the performance of Fe-based catalysts for CO2 hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2015, 43(11): 1387-1392.

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CHEN Hong-xian, NING Wen-sheng, CHEN Chun-hua, ZHANG Tian. Influence of Fe₂O₃ crystal phase on the performance of Fe-based catalysts for CO₂ hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2015, 43(11): 1387-1392.

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Influence of Fe₂O₃ crystal phase on the performance of Fe-based catalysts for CO₂ hydrogenation

College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China

Funds: The project was supported by Zhejiang Provincial Natural Science Foundation of China (LY14B030003) and National Ministry of Science and Technology of China (2014BAD02B05).

Received Date: 2015-04-24
Rev Recd Date: 2015-06-05
Publish Date: 2015-11-30

Abstract

Abstract

FeAl precursors (remarked as P) were prepared by co-precipitation method. Then they were impregnated with promoter Zn, K and Cu into ZnKCu/FeAl catalysts (remarked as C). The precursors and catalysts were characterized by low temperature N₂ adsorption, XRD and H2-TPR. CO₂ hydrogenation over these catalysts was investigated in a fixed-bed reactor. With the addition of Al, the specific surface area of FeAl precursors and ZnKCu/FeAl catalysts was increased relative to that of Al-free samples. On the contrary, the crystallite size of a-Fe₂O₃ was decreased by the added Al. The dispersed degree of Cu was raised in the catalysts containing Al. It is benefit for the reduction of ZnKCu/FeAl catalysts. However, the specific surface area and a -Fe₂O₃ crystallite size of P-10 and C-10, in which the Al2O3/Fe₂O₃ mass ratio is 10%, were similar to those of P-5 and C-5 with 5% Al 2O3/Fe₂O₃ mass ratio, respectively. The phenomena were resulted from the strong g-Fe₂O₃ phase in P-10 and C-10. It was evidenced that g-Fe₂O₃ was formed only in the case of Fe and Al were co-precipitated, and the precipitate was washed by anhydrous ethanol in this study. The catalyst with strong g-Fe₂O₃ phase was more active in CO₂ hydrogenation than the catalysts with none or weak g-Fe₂O₃ phase. This correlation was supported by the comparison between two catalysts with the same Al content, but different Fe₂O₃ phases in them.
- Fe-based catalyst,
- Al content,
- Fe₂O₃crystal phase,
- CO₂hydrogenation

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References(22)

References

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