关于SCR脱硝催化剂失活及其原因分析

Inactivation of SCR Denitration Catalyst and Its Cause Analysis

以在运转过程中的蜂窝类SCR催化剂与新式催化剂为调研受体,使用红外线照射、氮气吸脱附、X光照射、电镜扫描等模式对新式催化剂以及运转状态的催化剂完成测试。结果说明,运转过程中的催化剂表层官能团形成改变,比表比率迅速下降,载体发生了型变,而且催化剂表层微粒发生聚拢情况。对运转后的催化剂活性下降的原由实施了调研,说明脱硝催化剂在运转路程中遭遇偶发性温度升高的现象,致使活性形成劣化的态势。另外,催化剂表层沉淀物内,水溶性颗粒与砷、磷等成分的催化活性明显受到波及。

In the course of the operation of the honeycomb type SCR catalyst with the new catalyst for the research receptor.Thecatalyst was tested on the new catalyst and the operating state by infrared irradiation, nitrogen desorption, X-ray irradiation, andelectron microscopy.This type of test shows that the formation of the catalyst in the process of the formation of functional changes, theratio of the rapid decline in the ratio of the cartier occurred, and the catalyst surface particles collapsed.The reason for the decrease inthe activity of the catalyst after the operation is the implementation of the investigation, indicating that the denitration catalyst in therunning process encountered occasional temperature rise phenomenon, resulting in deterioration of the formation of the situation.qlnaddition, the catalyst surface sediment, water-soluble particles and arsenic, phosphorus and other components of the catalytic activitywas significantly affected.