Preparation of the CuWO<sub>4</sub>/SBA-15 catalyst and its performance in the photocatalytic oxidation desulfurization

LI Jian; WANG Xue-ying; HUANG Xin; HONG Shuai-ling; YANG Li-na

Volume 48 Issue 5

May 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(5): 632-640

LI Jian, WANG Xue-ying, HUANG Xin, HONG Shuai-ling, YANG Li-na. Preparation of the CuWO4/SBA-15 catalyst and its performance in the photocatalytic oxidation desulfurization[J]. Journal of Fuel Chemistry and Technology, 2020, 48(5): 632-640.

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LI Jian, WANG Xue-ying, HUANG Xin, HONG Shuai-ling, YANG Li-na. Preparation of the CuWO₄/SBA-15 catalyst and its performance in the photocatalytic oxidation desulfurization[J]. Journal of Fuel Chemistry and Technology, 2020, 48(5): 632-640.

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Preparation of the CuWO₄/SBA-15 catalyst and its performance in the photocatalytic oxidation desulfurization

1.
College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China
2.
Sinopec Yanshan Petrochemical Company, Beijing 102500, China

Funds:

Program for Liaoning Excellent Talents in University LJQ2015062

Program for Science and Technology Agency of Liaoning Province 20170540585

General Scientific Research Project of Liaoning Provincial Department of Education L2015296

General Scientific Research Project of Liaoning Provincial Department of Education L2016018

Received Date: 2020-02-01
Rev Recd Date: 2020-04-14

Available Online: 2021-01-23

Publish Date: 2020-05-10

Abstract

Abstract

The CuWO₄/SBA-15 catalyst was prepared with CuWO₄ as the active composite and mesoporous SBA-15 molecular sieve as the support and characterized by XRD, N₂ adsorption and desorption, FT-IR, UV-vis, SEM, EDS and TEM; the performance of CuWO₄/SBA-15 catalyst in the photocatalytic oxidation desulfurization (PODS) was investigated by using the dodecane solution of dibenzothiophene (DBT) as the model fuel. The results show that the CuWO₄/SBA-15 catalyst can maintain the two-dimensional hexagonal mesoporous structure of the support and the active component is evenly distributed on the support; the surface area, pore size and pore volume of the CuWO₄/SBA-15 catalyst decrease with an increase in the amount of active component. Compared with CuWO₄, the CuWO₄/SBA-15 catalyst displays a blue shift in absorption boundary of UV-vis spectra and an increase of the band gap. With a CuWO₄/SiO₂ mass ratio of 0.07, catalyst mass percentage of 3% in the model fuel, O/S molar ratio of 10:1, and extractant/oil volume ratio of 1:1, the desulfurization rate reaches 81.5% by carrying out the PODS reaction under light for 100 min, which is obviously higher than that over CuWO₄; moreover, no obvious decrease of catalytic activity for CuWO₄/SBA-15 was observed after 6 runs of PODS. It is proposed that ·OH and h⁺ are the main reactive intermediates in PODS.
- desulfurization,
- SBA-15,
- CuWO₄,
- photocatalytic,
- oxidation

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References

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