One-step conversion of syngas to hydrocarbons and ethers over ZIF-8 derived ZnO coupling HZSM-5

ZHAO Chun-qiu; LIU Jing-ge; LIU Cheng-wei; ZHANG Cheng-hua; LIU Dan; GUI Jian-zhou

Volume 48 Issue 6

Jun. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(6): 698-703

ZHAO Chun-qiu, LIU Jing-ge, LIU Cheng-wei, ZHANG Cheng-hua, LIU Dan, GUI Jian-zhou. One-step conversion of syngas to hydrocarbons and ethers over ZIF-8 derived ZnO coupling HZSM-5[J]. Journal of Fuel Chemistry and Technology, 2020, 48(6): 698-703.

Citation:

ZHAO Chun-qiu, LIU Jing-ge, LIU Cheng-wei, ZHANG Cheng-hua, LIU Dan, GUI Jian-zhou. One-step conversion of syngas to hydrocarbons and ethers over ZIF-8 derived ZnO coupling HZSM-5[J]. Journal of Fuel Chemistry and Technology, 2020, 48(6): 698-703.

Citation:

ZHAO Chun-qiu, LIU Jing-ge, LIU Cheng-wei, ZHANG Cheng-hua, LIU Dan, GUI Jian-zhou. One-step conversion of syngas to hydrocarbons and ethers over ZIF-8 derived ZnO coupling HZSM-5[J]. Journal of Fuel Chemistry and Technology, 2020, 48(6): 698-703.

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One-step conversion of syngas to hydrocarbons and ethers over ZIF-8 derived ZnO coupling HZSM-5

1.
Tianjin Key Laboratory of Green Chemical Technology and Processes Engineering, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300387, China
2.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Beijing 101407, China

Funds:

the National Natural Science Foundation of China 21576211

the National Natural Science Foundation of China 21908164

More Information

Corresponding author: ZHANG Cheng-hua.Tel: +86-69667802, E-mail: zhangchh@sxicc.ac.cn; LIU Dan.Tel: +86-22-83955521, E-mail: liudan@tiangong.edu.cn
Received Date: 2020-04-07
Rev Recd Date: 2020-06-02

Available Online: 2021-01-23

Publish Date: 2020-06-10

Abstract

Abstract

Zeolitic imidazolate frameworks (ZIF-8) were synthesized by solvothermal method. Used as precursor, ZIF-8 was decomposed into nanoparticles ZnO at different pyrolysis temperature in air atmosphere. The composition, structure and crystal size of ZnO were characterized by XRD, TEM, XPS, and Raman methods. The ZnO nanoparticles were coupled with HZSM-5 to form bifunctional catalysts. The catalytic performances of bifunctional catalysts in the syngas conversion were investigated in a fixed-bed tubular reactor. The results demonstrate that the pyrolysis temperature has an important influence on the particle size of ZnO. The temperature affects the rate of grain formation. High temperature promotes the aggregation of ZnO. The ZnO grain size by changing the temperature plays a role in changing the product distribution. When the pyrolysis temperature is near or below 450℃, carbon-coated ZnO nanoparticles are obtained, and the ZnO grain size is less than 20 nm. The carbon-coated ZnO coupled with HZSM-5 catalyzes syngas mainly into dimethyl ether (DME). When the temperature is higher than 450℃, pure phase ZnO nanoparticles are obtained, and the ZnO grain size is larger than 20 nm. The pure ZnO coupled with HZSM-5 catalyzes syngas mainly into hydrocarbons. Obviously, the coupling modes of ZnO and HZSM-5 have a significant effect on the product selectivity of bifunctional catalysts.
- ZIF-8,
- ZnO,
- bifunctional catalyst,
- syngas conversion,
- DME,
- hydrocarbon

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References(26)

References

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