|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Energy Technologies and CO2 Management Symposium
||CaO Poisoning on Mn-Ce/AC Catalyst for Selective Catalytic Reduction of NO with NH3 at Low Temperature
||Zenghui Su, Shan Ren, Jie Yang, Tianshi Zhang, Zelong Cai, Lin Chen, Ming Kong, Qingcai Liu, Jian Yang, Jiangling Li
|On-Site Speaker (Planned)
A series of Ca-doped Mn-Ce/AC catalyst were prepared by impregnation method and used for selective reduction(SCR) of NO with NH3 at the temperature range of 75-250 oC. SEM, BET, XRD, XPS NH3-TPD and FT-IR was carried out to study the deactivation reasons of CaO poisoned catalysts. Results showed that CaO resulted in a significant decrease of NO conversion efficiency. The doping of CaO resulted in a decrease in the specific surface area and total pore volume of the AC. The loading of CaO would cause a decrease in the concentration of Mn4+ on the surface of the catalyst and the redox capacity of the catalyst. The strong acid sites on the surface of the Ca-Mn-Ce/AC catalyst migrated to the high temperature zone, resulting in a decrease in the ammonia adsorption capacity of the catalyst. All of these would reduce denitrification activity of activated carbon catalysts.