铜基低温水汽变换催化剂HF中毒热力学分析

Thermodynamic analysis of HF poisoning on copper-based catalyst for the low temperature water-gas shift reaction

采用HSC Chemistry 5.1软件计算了铜基催化剂在低温（150~300℃）水汽变换条件下发生HF中毒的热力学可能性,分析和讨论了催化剂中毒可能发生的化学反应及中毒产物。结果表明,变换原料气的主要组分（CO、H_2、H_2O、N_2、O_2）中,仅有O_2能导致催化剂发生HF中毒,升高活性温度能抑制中毒反应的自发向右进行,中毒产物由易到难的生成顺序为CuF_2〉CuF〉Cu（OH）_2。

The thermodynamic possibility of poisoning on copper-based catalyst for low temperature（150 ~300°C）water-gas shift reaction with HF was calculated by HSC Chemistry 5.1 software. The possible chemical re-actions and poisoning products were analyzed and discussed. The results showed that O_2 could lead the catalyst to HF poisoning in the main components（CO, H_2, H_2O, N_2 and O_2）of feed gas for water-gas shift reaction, while the reaction to the right spontaneous was inhibited with the activity temperature increasing. The formation from weak to strong of poisoning products follows the order of Cu（OH）_2CuFCuF_2.