Enhancing the K resistance of CeTiOx catalyst in NH3-SCR reaction by CuO modification

Keke Kang; Xiaojiang Yao; Jun Cao; Zhe Li; Jing Rong; Wen Luo; Wanxia Zhao; Yang Chen

doi:10.1016/j.jhazmat.2020.123551

Enhancing the K resistance of CeTiO_x catalyst in NH₃-SCR reaction by CuO modification

J Hazard Mater. 2021 Jan 15:402:123551. doi: 10.1016/j.jhazmat.2020.123551. Epub 2020 Jul 25.

Authors

Keke Kang¹, Xiaojiang Yao², Jun Cao³, Zhe Li¹, Jing Rong³, Wen Luo¹, Wanxia Zhao³, Yang Chen¹

Affiliations

¹ Research Center for Atmospheric Environment, Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China; College of Resources and Environment, Chongqing School, University of Chinese Academy of Sciences (UCAS Chongqing), Chongqing 400714, PR China; School of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, PR China.
² Research Center for Atmospheric Environment, Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China; College of Resources and Environment, Chongqing School, University of Chinese Academy of Sciences (UCAS Chongqing), Chongqing 400714, PR China; School of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: yaoxj@cigit.ac.cn.
³ Research Center for Atmospheric Environment, Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China; College of Resources and Environment, Chongqing School, University of Chinese Academy of Sciences (UCAS Chongqing), Chongqing 400714, PR China.

PMID: 32763768
DOI: 10.1016/j.jhazmat.2020.123551

Abstract

It is generally accepted that CeTiO_x catalyst owns outstanding catalytic activity for ammonia-selective catalytic reduction (NH₃-SCR), but the tolerance to alkali metals is still dissatisfactory. Thus, it is of great importance to further elevate the catalytic activity and resistance to alkali metals of CeTiO_x catalyst. In our work, a series of CeTiO_x, CuO/CeTiO_x, K-CeTiO_x and K-CuO/CeTiO_x catalysts were prepared to comprehensively analyze the influence of CuO modification on the physicochemical features, catalytic activity and anti-K ability of CeTiO_x catalyst. The results manifest that CuO modification effectively enhances low-temperature catalytic activity and anti-K poisoning ability of CeTiO_x catalyst by protecting the reduction ability and the surface acidity as well as weakening the adsorption strength of NO_x.

Keywords: Anti-K ability; CeTiO(x) catalyst; CuO modification; NH(3)-SCR reaction.