A Novel Oxidative Desulfurization System for Diesel Fuels with Molecular Oxygen in the Presence of Cobalt Catalysts and Aldehydes
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- 作者：Satoru Murata ; Kazutaka Murata ; Koh Kidena ; and Masakatsu Nomura
- 刊名：Energy & Fuels
- 出版年：2004
- 出版时间：January 2004
- 年：2004
- 卷：18
- 期：1
- 页码：116 - 121
- 全文大小：78K
- 年卷期：v.18,no.1(January 2004)
- ISSN：1520-5029
文摘
Oxidative desulfurization of diesel fuels with molecular oxygen was examined by using cobaltsalts and aldehydes as catalysts and sacrificial materials, respectively. At first, the authorsconducted desulfurization of model oils consisting of benzene and dibenzothiophene. A mixtureof benzene, dibenzothiophene, n-octanal, and an appropriate cobalt salt (acetate or chloride) wasstirred at 40 
C under atmospheric pressure of oxygen to afford dibenzothiophene sulfone inalmost quantitative yield within 15 min. Dibenzothiophene sulfone produced could be easilyremoved from the model oils by silica or alumina adsorption. Several organic sulfides includingthioanisole, diphenyl sulfide, benzothiophene, and 4,6-dimethyldibenzothiophene also could beconverted to the corresponding sulfones in almost quantitative yields. Then, the authors examinedultra deep desulfurization of a commercial diesel fuel, which contains 193 wt ppm of sulfur. Byusing the system consisting of cobalt acetate, aldehyde, and molecular oxygen, sulfur-containingcompounds in the diesel fuel were oxidized, and then removed by alumina adsorption and/orsolvent extraction. The resulting oil contained less than 5 wt ppm of sulfur; this corresponds tothe result that more than 97% of sulfur in the oil could be removed. These results may indicatethat this brand-new oxidative desulfurization process has a potential to meet a future regulationof sulfur in the diesel fuel.
C under atmospheric pressure of oxygen to afford dibenzothiophene sulfone inalmost quantitative yield within 15 min. Dibenzothiophene sulfone produced could be easilyremoved from the model oils by silica or alumina adsorption. Several organic sulfides includingthioanisole, diphenyl sulfide, benzothiophene, and 4,6-dimethyldibenzothiophene also could beconverted to the corresponding sulfones in almost quantitative yields. Then, the authors examinedultra deep desulfurization of a commercial diesel fuel, which contains 193 wt ppm of sulfur. Byusing the system consisting of cobalt acetate, aldehyde, and molecular oxygen, sulfur-containingcompounds in the diesel fuel were oxidized, and then removed by alumina adsorption and/orsolvent extraction. The resulting oil contained less than 5 wt ppm of sulfur; this corresponds tothe result that more than 97% of sulfur in the oil could be removed. These results may indicatethat this brand-new oxidative desulfurization process has a potential to meet a future regulationof sulfur in the diesel fuel.