CuO/TiO2 catalysts for gas-phase Hg0 catalytic oxidation

被引：134

作者：

Xu, Wenqing ^{[1
]}

Wang, Hairui ^{[1
]}

Zhou, Xuan ^{[1
]}

Zhu, Tingyu ^{[1
]}

机构：

[1] Chinese Acad Sci, Res Ctr Proc Pollut Control, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2014年 / 243卷

基金：

中国国家自然科学基金;

关键词：

Hg-0; CuO/TiO2; Catalytic oxidation; HCl; Mechanism; COMBUSTION FLUE-GAS; MERCURY OXIDATION; ELEMENTAL MERCURY; COAL-COMBUSTION; SCR CATALYST; LOW-TEMPERATURE; HCL OXIDATION; POWER-PLANTS; REMOVAL; EMISSIONS;

D O I：

10.1016/j.cej.2013.12.014

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

CuO/TiO2 catalysts prepared by an impregnation method were studied to determine their efficiencies of mercury oxidation in the simulated flue gas. In this study, 7% CuO/TiO2 was found to be an optimal catalyst with an oxidation efficiency of over 98% at temperatures in the range of 50-300 degrees C. X-ray diffracto-grams (XRD), Brunauer-Emmet-Teller (BET) measurements, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to characterize the catalysts; the results indicated the CuO was well-dispersed on the surface of TiO2 and that Cu2+ was the primary Cu species contributing to Hg-0 oxidation. HCl was the most effective flue gas component responsible for the Hg-0 oxidation. Also, 5-ppm HCl resulted in 100% Hg-0 oxidation under the experimental conditions. The mechanism of Hg-0 oxidation was also investigated. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：380 / 385

页数：6

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