【摘 要】
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Catalysts for the desulfurization of gasoline samples were synthesized via the immobilization of welldispersed phosphotungstic acid (HPW) on Mobil composition o
【机 构】
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College of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, C
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Catalysts for the desulfurization of gasoline samples were synthesized via the immobilization of welldispersed 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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