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2020, Volume 14, Issue 4

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Frontiers of Chemical Science and Engineering >> 2020, Volume 14, Issue 4 doi: 10.1007/s11705-019-1842-z

Catalytic oxidative desulfurization of gasoline using phosphotungstic acid supported on MWW zeolite

College of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China

Accepted: 2019-11-29 Available online: 2019-11-29
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Abstract

Catalysts for the desulfurization of gasoline samples were synthesized via the immobilization of well-dispersed phosphotungstic acid (HPW) on Mobil composition of matter-twenty-two (MWW) zeolite. Characterization results indicated that these catalysts possess a mesoporous structure with the retention of the Keggin structure of immobilized HPW. Relevant reaction parameters influencing sulfur removal were systematically investigated, including HPW loading, catalyst dosage, temperature, initial S-concentration, molar ratio of oxidant to sulfide (O/S), volume ratio of MeCN to model oil (Ext./oil), and sulfide species. The 40 wt-% HPW/MWW catalyst exhibited the highest catalytic activity with 99.6% dibenzothiophene sulfur removal from prepared samples. The 40 wt-% HPW/MWW catalyst was recycled four times and could be easily regenerated. Finally, as an exploratory study, straight-run-gasoline and fluid catalytic cracking gasoline were employed to accurately evaluate the desulfurization performance of 40 wt-% HPW/MWW. Our research provides new insights into the development and application of catalysts for desulfurization of gasoline.

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