Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (12): 2814.doi: 10.7503/cjcu20130641

• Physical Chemistry • Previous Articles     Next Articles

Synthesis, Characterization and Catalytic Fuel Ultra-deep Desulfurization of Hollow Amino-SiO2 Supported Heteropoly Compound Catalyst

LIU Ri-Jia, WANG Rui   

  1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
  • Received:2013-07-09 Online:2013-12-10 Published:2013-10-28

Abstract:

Hollow SiO2 was prepared by dispersion aggragation before uploading HPW. The prepared catalyst was characterized by N2 adsorption-desorption, FTIR, XRD and SEM. The method of catalytic extraction fuel ultra-deep desulfurization was developed using hydrogen peroxide as oxidant and MeCN as extractants. The effects of catalyst dosage, O/S molar ratio, pre-immersion time of the catalyst in H2O2 solution, reaction temperature and initial sulfur content were investigated. Under the favourable operating conditions recommended as follows: mass ratio of catalyst dosage and simulated diesel of 1.0%, O/S molar ratio of 15, pre-immersion time of the catalyst in H2O2 solution being 4 min, temperature of 60 ℃ and initial sulfur content of 350 mg/L, the sulfur content of simulated diesel can be reduced from 350 mg/L to 2.45 mg/L, with a desulfurization efficiency of 99.3% at 180 min. The overal desulfurization efficiency reaches 99.3%, higher than that by mere extraction by 45.1%, efficiency significantly. Moreover, NH4PW-SiO2 for real gasoline and diesel catalytic oxidative desulfurization was obtained with good effect and the catalyst recovered demonstrates almost the same activity as the fresh after 5 recycles.

Key words: Heteropoly compound, Hollow SiO2, Oxidative desulfurization, Organic sulfur, Hydrogen peroxide

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