The Characterization and Mercury Oxidation Performance of Bromine-Doped Vanadia/Titania Oxide Catalyst

¹Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing, PR China
²School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, PR China
³School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou, PR China

^∗Corresponding authors: 
Yuntao Li, Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, PR China.
Linzhi Zhai, School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, PR China

Received: November 10, 2019
Published: November 26, 2019

ABSTRACT

Mercury pollution produced by coal combustion has been identified as a severe hazardous pollutant to human health and the environment. For the coal-fired power plants, one of the most cost-effective methods to control mercury is to use SCR catalysts, which can achieve both denitration and oxidation effects, simultaneously. In the present study, a new SCR catalyst, bromine-doped vanadia/titania oxide, has been developed, and its structure and mercury oxidation characteristics were systematically studied. Results demonstrated that, in compare to the control sample, bromine-doped vanadia/titania oxide has obviously higher amount of V⁴⁺ and Ti³⁺, thus resulting in an improved redox property. Activity tests showed that the catalytic capacity was highly dependent on the doping amount of bromine with a specific feature from ‘low to high to low’, The highest value for mercury oxidation of the product is [Br]/[Ti]=1.2×10^-2.

Keywords: Minamata Convention; Mercury control; SCR denitration catalyst; Bromine doping