頁籤選單縮合
| 題 名 | Oxidative Desulfurization of Diesel Oil Using Mesoporous Phosphotungstic Acid/SiO[feaf] as Catalyst |
|---|---|
| 作 者 | 顏學敏; 雷家珩; 劉丹; 吳陽春; 郭麗萍; | 書刊名 | Journal of the Chinese Chemical Society |
| 卷 期 | 54:4 2007.08[民96.08] |
| 頁 次 | 頁911-916 |
| 分類號 | 341 |
| 關鍵詞 | Oxidative desulfurization; Diesel fuel; Mesoporous HPW/SiO[feaf]; |
| 語 文 | 英文(English) |
| 英文摘要 | Ordered mesoporus phosphotungstic acid/SiO2 (HPW/SiO2) with Keggin-type teteropolyacids (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℃ with H2O2 as the oxidant and acetonitrile as the extraction agent. The sulfur content in diesel was reduced to as low as 48-86 μg/g from the initial level of 438μg/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 shoed 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. |
本系統中英文摘要資訊取自各篇刊載內容。