Application of Fe/Activated Carbon Catalysts in the Hydroxylation of Phenol to Dihydroxybenzenes

被引：43

作者：

Jin, Mingming ^{[1
]}

Yang, Ruiguang ^{[1
]}

Zhao, Meifang ^{[1
]}

Li, Guiying ^{[1
]}

Hu, Changwei ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, Chengdu 610064, Sichuan, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 08期

基金：

中国国家自然科学基金;

关键词：

WET PEROXIDE OXIDATION; HYDROGEN-PEROXIDE; ZEOLITE-Y; PERFORMANCE; BENZENE; TEMPERATURE; COMPLEXES;

D O I：

10.1021/ie404010u

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A series of Fe/activated carbon catalysts were prepared by impregnation of activated carbon with aqueous solution of ferric nitrate and employed in phenol hydroxylation to dihydroxybenzenes using hydrogen peroxide as oxidant. The samples were characterized by thermal analysis, inductively coupled plasma atomic emission spectrometry (ICP-AES), N-2-adsorption, temperature-programmed oxidation mass spectrometry (TPO-MS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Part of the ferric (Fe(III)) species was reduced to ferrous (Fe(II)) species forming Fe3O4 when the Fe/activated carbon catalyst was heated at 400 degrees C for 3 h in air. Fe3O4 highly dispersed on activated carbon was found to be the active phase for the target reaction. The appearance of ferrous (Fe(II)) species greatly improved the catalytic activity. A phenol conversion of 41.3% and a yield of 36.0% to dihydroxybenzenes were obtained under the following optimal reaction conditions: catalyst amount, 0.1 g; reaction temperature, 30 degrees C; molar ratio of phenol/H2O2, 10.6/9.8; reaction time, 1 h.

引用

页码：2932 / 2939

页数：8

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