CuO/TiO2 catalysts for gas-phase Hg0 catalytic oxidation

被引：135
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
收藏
页码：380 / 385
页数：6
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