Low-cost preparation of carbon-supported cobalt catalysts from MOFs and their performance in CO hydrogenation

LI Ning; MA Cai-ping; ZHANG Cheng-hua; YANG Yong; LI Yong-wang

Volume 47 Issue 4

Apr. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(4): 428-437

LI Ning, MA Cai-ping, ZHANG Cheng-hua, YANG Yong, LI Yong-wang. Low-cost preparation of carbon-supported cobalt catalysts from MOFs and their performance in CO hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 428-437.

Citation:

LI Ning, MA Cai-ping, ZHANG Cheng-hua, YANG Yong, LI Yong-wang. Low-cost preparation of carbon-supported cobalt catalysts from MOFs and their performance in CO hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 428-437.

Citation:

LI Ning, MA Cai-ping, ZHANG Cheng-hua, YANG Yong, LI Yong-wang. Low-cost preparation of carbon-supported cobalt catalysts from MOFs and their performance in CO hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 428-437.

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Low-cost preparation of carbon-supported cobalt catalysts from MOFs and their performance in CO hydrogenation

LI Ning^{1, 2},
MA Cai-ping^{1, 2},
ZHANG Cheng-hua^{1, 3
,
,},
YANG Yong^{1, 3},
LI Yong-wang^{1, 3}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Beijing 101407, China

Funds:

the National Natural Science Foundation of China 91545109

More Information

Corresponding author: ZHANG Cheng-hua, Tel: +86 69667802, E-mail: zhangchh@sxicc.ac.cn
Received Date: 2018-12-21
Rev Recd Date: 2019-01-26

Available Online: 2021-01-23

Publish Date: 2019-04-10

Abstract

Abstract

With terephthalic acid (H₂BDC) as ligand and cobalt acetate as Co source, metal-organic frameworks (Co-BDC MOFs) were synthesized in water by co-precipitation; after that, core-shell Co@C catalysts were prepared by chemical vapor deposition (CVD) of Co-BDC MOFs in acetylene and Ar atmosphere. The structure, composition and properties of Co@C catalysts were characterized by XRD, nitrogen physisorption, SEM, TEM, XPS, TGA and Raman spectroscopy and their catalytic performance in Fischer-Tropsch synthesis (FTS) were investigated in a fixed-bed tubular reactor. The results demonstrated that the carbonization atmosphere has an important influence on the graphitization degree of carbon shell, whereas has little effect on the phase and size of Co core. The pore of graphite shell is significantly improved by CVD in acetylene, which can enhance the selectivity to heavier hydrocarbons (C₅₊) for CO hydrogenation; in particular, the Co@C-C₂H₂ catalyst shows a high selectivity of 82.66% to the C₅₊ hydrocarbons. As the carbon shell can effectively inhibit the cobalt nanoparticles from migration and agglomeration during the FTS reaction, the Co species were well distributed in both the fresh and spent catalysts and no significant sintering and deactivation are observed for the Co@C catalysts upon the FTS tests. During the FTS reaction, the active phase changes from metallic Co to a mixture of metallic Co and Co₂C, whilst the catalytic activity of Co@C-C₂H₂ keeps almost unchanged, suggesting that Co₂C may also be an active phase for the Fischer-Tropsch synthesis.
- Co-based catalyst,
- metal-organic frameworks,
- Fischer-Tropsch synthesis,
- carbon support,
- Co@C,
- Co₂C

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References(31)

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