Regulating Iron Species Compositions by Fe-Al Interaction in Co2 Fischer-Tropsch Synthesis

28 Pages Posted: 23 Mar 2022

See all articles by Minjie Xu

Minjie Xu

affiliation not provided to SSRN

Xianglin Liu

affiliation not provided to SSRN

Guiyao Song

affiliation not provided to SSRN

Yingying Cai

affiliation not provided to SSRN

Bianfang Shi

affiliation not provided to SSRN

Yitao Liu

affiliation not provided to SSRN

Xiaoxu Ding

affiliation not provided to SSRN

Zixu Yang

East China University of Science and Technology (ECUST) - State Key Laboratory of Chemical Engineering

Pengfei Tian

affiliation not provided to SSRN

chenxi cao

affiliation not provided to SSRN

jing xu

affiliation not provided to SSRN

Abstract

Different iron species exhibit distinct activity and selectivity in CO 2 Fischer-Tropsch synthesis. Herein, by controlling calcination temperature, Fe-Al interaction in Na promoted Fe-Al catalysts has been regulated, which further leads to various compositions of iron oxide (FeO x ) and iron carbides (Fe 7 C 3 and Fe 5 C 2 ) after CO activation and CO 2 hydrogenation reaction. The phase compositions and structures of Fe-Al catalysts are carefully distinguished by multiple characterizations, including XRD, XPS, MES and TEM, and the reactivity of different phases is studied with the combination of experiments (kinetics, TP and in situ DRIFTS) and Density Functional Theory (DFT) calculations. Our FeAl350 with the highest FeC x content shows the highest CO 2 conversion of 48.2% and the lowest CO selectivity of 10.1%, and FeAl900 with the highest Fe 5 C 2 / FeC x ratio presents the highest C 5+ selectivity of 44.6%. Finally, a correlation between different compositions of iron species with the activity and selectivity of Fe-based for CO 2 Fischer-Tropsch synthesis (CO 2 -FTS) was established.

Keywords: CO2 hydrogenation, Fe-Al interaction, Iron oxide, iron carbide

Suggested Citation

Xu, Minjie and Liu, Xianglin and Song, Guiyao and Cai, Yingying and Shi, Bianfang and Liu, Yitao and Ding, Xiaoxu and Yang, Zixu and Tian, Pengfei and cao, chenxi and xu, jing, Regulating Iron Species Compositions by Fe-Al Interaction in Co2 Fischer-Tropsch Synthesis. Available at SSRN: https://ssrn.com/abstract=4042695 or http://dx.doi.org/10.2139/ssrn.4042695

Minjie Xu

affiliation not provided to SSRN ( email )

No Address Available

Xianglin Liu

affiliation not provided to SSRN ( email )

No Address Available

Guiyao Song

affiliation not provided to SSRN ( email )

No Address Available

Yingying Cai

affiliation not provided to SSRN ( email )

No Address Available

Bianfang Shi

affiliation not provided to SSRN ( email )

No Address Available

Yitao Liu

affiliation not provided to SSRN ( email )

No Address Available

Xiaoxu Ding

affiliation not provided to SSRN ( email )

No Address Available

Zixu Yang

East China University of Science and Technology (ECUST) - State Key Laboratory of Chemical Engineering ( email )

Shanghai, 200237
China

Pengfei Tian

affiliation not provided to SSRN ( email )

No Address Available

Chenxi Cao

affiliation not provided to SSRN ( email )

No Address Available

Jing Xu (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

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