Abstract: An in-depth study on the deactivated mechanism and regeneration method of SCR de-NOx honeycomb catalyst for a biomass power plant is carried on.Results show that the deactivation is mainly caused by two reasons as the following:(1)Catalyst blockage.Blinding rate of the deactivated catalysts exceeds 50%.Fly ash causes the actual reaction area of catalyst to reduce greatly.(2)Alkalosis.Blinding ash containing alkali metal and alkaline earth metal damages the surface acid sites of catalyst,reducing the activity of catalyst and making it poisoned.According to the mechanism of catalyst deactivation,the regeneration process is hence developed.And the pilot shows that through soot-blowing,cleaning,pickling,activity supplementing and burning under certain conditions,the activity of catalyst can recover and meet the industrial service requirements.
何发泉, 王宝冬, 马少丹, 马子然, 马静, 刘子林, 林德海, 孙琦, 徐文强. 生物质电厂SCR脱硝催化剂失效及再生研究[J]. 现代化工, 2017, 37(8): 72-76.
HE Fa-quan, WANG Bao-dong, MA Shao-dan, MA Zi-ran, MA Jing, LIU Zi-lin, LIN De-hai, SUN Qi, XU Wen-qiang. Deactivation mechanism and regeneration of SCR denitration catalyst served in biomass power plant. Modern Chemical Industry, 2017, 37(8): 72-76.