Study on the poisoning effect-of non-vanadium catalysts by potassium

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Zeng, Huanmu^1,2 ; Liu, Ying^1,2 ; Yu, Xiaowei^1 ; Lin, Yasi^1

South China Institute of Environmental Sciences, Ministry of Environmental Protection of PRC, No. 7 West Street, Yuancun, Guangzhou

510655, China^1

Key Laboratory of Water and Air Pollution Control of Guangdong Province, West Street No. 7, Yuancun, Guangzhou

510655, China^2

关键词: Alkali poisoning;    Characterization methods;    Chromium oxides;    Poisoning effects;    TiO2 nano-particles;    Vanadium catalyst;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012153/pdf
DOI  :  10.1088/1755-1315/113/1/012153

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The poisoning effect of catalyst by alkali metals is one of the problems in the selective catalytic reduction (SCR) of NO by NH3. Serious deactivation by alkali poisoning have been proved to take place in the commercial vanadium catalyst. Recently, non-vanadium catalysts such as copper oxides, manganese oxides, chromium oxides and cerium oxides have attracted special attentions in SCR application. However, their tolerance in the presence of alkali metals is still doubtful. In this paper, copper oxides, manganese oxides, chromium oxides and cerium oxides supported on TiO2nanoparticle was prepared by impregnating method. Potassium nitrate was chosen as the precursor of poisoner. Catalytic activities of these catalysts were evaluated before and after the addition of potassium. Some characterization methods including X-ray diffraction and temperature programmed desorption was utilized to reveal the main reason of alkali deactivation.