- 作者: 顏學敏,雷家珩,劉丹,吳陽春,郭麗萍
- 作者服務機構: Department of Applied Chemistry, Wuhan University of Technology, Wuhan 430070, P. R. China
- 中文摘要: Ordered mesoporous phosphotungstic acid/SiO2 (HPW/SiO2) with Keggin-type heteropolyacids (HPAs) encapsulated into a SiO2 framework has been synthesized and used as the catalyst for oxidative desulfurization of diesel fuel. The sulfur compounds in diesel were oxidized and removed at a temperature range of 50-80 °C with H2O2 as the oxidant and acetonitrile as the extraction agent. The sulfur content in diesel was reduced to as low as 48-86 mg/g from the initial level of 438 mg/g. The loss in catalytic activity was negligible even after five cycles of use, and the reduction of the sulfur content was enhanced with increasing the immobilized phosphotungstic acid (HPW) concentration. Oxidation of model compounds showed that in the heterogeneous system both the electron density and the steric hindrance affected the reactivity of these sulfur compounds. The reactivities of these sulfur compounds studied in this work followed the order of dibenzothiophene > 4,6-dimethydibenzothiophene > benzothiophene.
- 英文摘要: --
- 中文關鍵字: Oxidative desulfurization; Diesel fuel; Mesoporous HPW/SiO2.
- 英文關鍵字: --