Kang Keke, Yao Xiaojiang, Cao Jun, Li Zhe, Rong Jing, Luo Wen, Zhao Wanxia, Chen Yang
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.
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.
J Hazard Mater. 2021 Jan 15;402:123551. doi: 10.1016/j.jhazmat.2020.123551. Epub 2020 Jul 25.
It is generally accepted that CeTiO catalyst owns outstanding catalytic activity for ammonia-selective catalytic reduction (NH-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 catalyst. In our work, a series of CeTiO, CuO/CeTiO, K-CeTiO and K-CuO/CeTiO catalysts were prepared to comprehensively analyze the influence of CuO modification on the physicochemical features, catalytic activity and anti-K ability of CeTiO catalyst. The results manifest that CuO modification effectively enhances low-temperature catalytic activity and anti-K poisoning ability of CeTiO catalyst by protecting the reduction ability and the surface acidity as well as weakening the adsorption strength of NO.
一般认为，CeTiO催化剂对氨选择性催化还原（NH-SCR）具有出色的催化活性，但对碱金属的耐受性仍不尽人意。因此，进一步提高CeTiO催化剂的催化活性和对碱金属的抗性具有重要意义。在我们的工作中，制备了一系列CeTiO、CuO/CeTiO、K-CeTiO和K-CuO/CeTiO催化剂，以全面分析CuO改性对CeTiO催化剂的物理化学特性、催化活性和抗钾能力的影响。结果表明，CuO改性通过保护还原能力和表面酸度以及减弱NO的吸附强度，有效地提高了CeTiO催化剂的低温催化活性和抗钾中毒能力。
