Desulfurization process for dibenzothiophenes from light oil by photochemical reaction and liquid-liquid extraction
- Osaka Univ., Toyonaka, Osaka (Japan). Dept. of Chemical Engineering
A desulfurization process for dibenzothiophene (DBT) and its derivatives such as 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) by combination of photochemical reaction and liquid-liquid extraction has been investigated. In this, the DBTs dissolved in tetradecane were quantitatively photodecomposed by the use of a high-pressure mercury lamp and were removed to the water phase as SO{sub 4}{sup 2{minus}} at conditions of room temperature and atmospheric pressure. The order of reactivity for the DBTs was DBT < 4-MDBT < 4,6-DMDBT, thus indicating a different tendency from that reported for the hydrodesulfurization method. The desulfurization yield of commercial light oil, however, by the proposed method was only 22% following 30 h irradiation and was caused mainly by the depression of the photoreaction of DBT by the presence of aromatic compounds in the light oil.
- OSTI ID:
- 212212
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 35, Issue 2; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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