Effect of additive on CuO-ZnO/SBA-15 catalytic performance of CO<sub>2</sub> hydrogenation to methanol

LIN Min; NA Wei; YE Hai-chuan; HUO Hai-hui; GAO Wen-gui

Volume 47 Issue 10

Oct. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(10): 1214-1225

LIN Min, NA Wei, YE Hai-chuan, HUO Hai-hui, GAO Wen-gui. Effect of additive on CuO-ZnO/SBA-15 catalytic performance of CO2 hydrogenation to methanol[J]. Journal of Fuel Chemistry and Technology, 2019, 47(10): 1214-1225.

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LIN Min, NA Wei, YE Hai-chuan, HUO Hai-hui, GAO Wen-gui. Effect of additive on CuO-ZnO/SBA-15 catalytic performance of CO₂ hydrogenation to methanol[J]. Journal of Fuel Chemistry and Technology, 2019, 47(10): 1214-1225.

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Effect of additive on CuO-ZnO/SBA-15 catalytic performance of CO₂ hydrogenation to methanol

LIN Min^{1, 2},
NA Wei^{1, 3
,
,},
YE Hai-chuan^{1, 3},
HUO Hai-hui^{1, 3},
GAO Wen-gui^{1, 3}

1.
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
2.
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650093, China
3.
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China

Funds:

the Natural Science Foundation of China 51404122

the Natural Science Foundation of China 51304099

the Natural Key Technologies R & D Program of China 2011BAC01B03

More Information

Corresponding author: NA Wei, E-mail: weina@kmust.edu.cn
Received Date: 2019-06-25
Rev Recd Date: 2019-09-05

Available Online: 2021-01-23

Publish Date: 2019-10-10

Abstract

Abstract

Three kinds of porous catalysts CuO-ZnO/SBA-15 (CZ/SBA-15), CuO-ZnO-MnO₂/SBA-15 (CZM/SBA-15) and CuO-ZnO-ZrO₂/SBA-15 (CZZ/SBA-15) were synthesized by impregnation method with a siliceous framework mesoporous molecular sieve SBA-15. The performance of all catalysts for catalytic hydrogenation of CO₂ to methanol was evaluated on a fixed bed reactor, combined with N₂ adsorption-desorption (BET), X-ray diffraction (XRD), H₂ temperature-programmed reduction (H₂-TPR), temperature programmed desorption (H₂-TPD, CO₂-TPD), N₂O titration, X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM). The results show that the introduction of metal oxide in the catalyst changes the pore size and specific surface area of the SBA-15 molecular sieve support. The CuO-ZnO-MnO₂/SBA-15 and CuO-ZnO-ZrO₂/SBA-15 have high copper dispersion (D_Cu%), large specific surface area (S_Cu), small surface CuO particle size, and easy to be reduced. Compared with the Mn-O cluster, the Zr-O cluster enhances the basic site and improves the methanol selectivity. In addition, CuO-ZnO-ZrO₂/SBA-15 has the highest oxygen vacancy concentration and better catalytic activity among three catalysts. The methanol selectivity of CuO-ZnO-ZrO₂/SBA-15 is 25.02%, which is 28% and 136.9% higher than those of CuO-ZnO/SBA-15 and CuO-ZnO-MnO₂/SBA-15, respectively.
- molecular sieve SBA-15,
- oxygen vacancy,
- alkaline sites,
- methanol

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References(66)

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