Thermodynamics of Cu/ZnO/Al2O3 water-gas shift catalyst poisoning on yellow phosphorus off-gas

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Jiang, Ming^1 ; Li, Bo^1 ; Li, Tao^1 ; Liu, Hong-Pan^2 ; Zhan, Fang-Dong^1 ; Ning, Ping^3

College of Resources and Environment, Yunnan Agricultural University, Kunming

650201, China^1

College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing

402160, China^2

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming

650500, China^3

关键词: Copper-based;    Gaseous impurities;    Heterogeneous reaction systems;    Thermodynamic theory;    Toxic components;    Water gas shift (WGS) reaction;    Water gas shift catalysts;    Yellow phosphorus;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/3/032075/pdf
DOI  :  10.1088/1755-1315/199/3/032075

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The thermodynamics of copper-based water-gas shift catalyst for yellow phosphorus off-gas have been calculated according to the thermodynamic theory of heterogeneous reaction systems. The possible chemical reactions and products were analyzed and are discussed here. The results show that AsH3 and S-containing gaseous impurities (H2S, COS, CS2, and SO2) in the yellow phosphorus off-gas can preferentially lead to active CuO poisoning of the catalyst, and the poisoning products are Cu3As and Cu2S. Small amounts of PH3 and P4 were the main cause of the inactivation of the anti-toxic component (ZnO) and the support (Al2O3) in the catalyst. The inactive products were Zn3(PO4)2 and AlPO4, respectively. If yellow phosphorus off-gas is used as the raw material gas for water-gas shift reaction, the As-, S- and P-containing gaseous impurities should be removed to avoid catalyst poisoning.