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| Thesis Name： |
Oxidation of thiophene over metal-loaded alumina and phase transfer catalyst |
| Usage： |
chemistry |
| Keyword： |
Oxidative desulfurization; thiophene; alumina; phase transfer catalyst |
| Remarks： |
Lanju Chen 1,2 Shaohui Guo 1 Dishun Zhao 2
(1 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249; 2Department of Chemistry, Hebei University of Science and Technology, Shijiazhuang, 050018, China)
Received Jan.18, 2006.
Abstract:
Thiophene(C4H4S) are typical thiophenenic sulfur compounds that existed in flow catalytic cracking (FCC) gasoline. Oxidation reactions of C4H4S were conducted with hydrogen peroxide (H2O2) and formic acid over a series of metal-loaded alumina. The effects of loaded metals, temperature, solvent and phase transfer catalyst on sulfur removal were investigated in detail. The results showed that the copper-loaded alumina was very active catalyst for oxidation of C4H4S in H2O2/ formic acid system. The oxidation of C4H4S was performed under mild reaction conditions and it was easy to achieve high oxidation conversions by increasing reaction temperature or reaction time. The sulfur removal rate of C4H4S was enhanced when phase transfer catalyst emulsifier OP or tetrabutylammonium bromide (TBAB) was added. Interestingly, in a H2O2 and formic acid system, with the addition of TBAB, a bromine substitution trend appeared in the oxidation of C4H4S, suggesting the influence of TBAB to the oxidation of C4H4S. |
| Original file： |
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