The oxidation of styrene by chromium-silica heterogeneous catalyst prepared from rice husk

被引：59

作者：

Adam, Farook ^{[1
]}

Iqbal, Anwar ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Chem Sci, George Town 11800, Malaysia

来源：

CHEMICAL ENGINEERING JOURNAL | 2010年 / 160卷 / 02期

关键词：

Oxidation of styrene; Silica-chromium catalyst; Rice husk silica; Benzaldehyde; Sol-gel; MCM-41; EPOXIDATION; ASH; CR; TI;

D O I：

10.1016/j.cej.2010.04.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Chromium was incorporated into the silica matrix extracted from rice husk in basic, neutral and acidic medium. The prepared catalysts were labeled as RHCr-10, RHCr-7 and RHCr-3 according to their pH. The specific surface area of RHCr-10, RHCr-7 and RHCr-3 was determined to be 144, 143 and 564 m(2) g(-1), respectively. The XRD results showed the catalysts to be amorphous. RHCr-3 showed better catalytic activity with 99.92% conversion of styrene. Benzaldehyde was the major product with styrene oxide, phenyl acetaldehyde, acetophenone, 1-phenylethanol, phenylglyoxal, styrene glycol and benzoic acid as by-products. Leaching of chromium was minimal and RHCr-3 could be recycled several times. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：742 / 750

页数：9

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