晶化条件对SAPO-34结晶度及催化活性的影响

Effects of Crystallization Conditions on the Crystallinity and Catalytic Activity of SAPO-34

研究了硅含量、铝硅源和操作条件对SAPO_34分子筛结晶度的影响 ,并探讨了以不同结晶度的SAPO_34分子筛为载体的催化剂在NO转化为N2 反应中的催化性能 .结果表明 ,采用无机铝源和无机硅源、以及采用预晶化和搅拌处理均有利于提高SAPO_34分子筛的结晶度 .结晶度高的SAPO_34 。

The effects of Si content, the various sources of Al and Si, and the operation methods on the crystallinity of SAPO_34 were studied. The activities of catalysts in the process of selective reduction NO by using SAPO_34 with different degrees of crystallinity as supports were investigated. It was found that those using inorganic precursors of Al and Si, or through pre_crystallization and stir treatment can improve the degrees of crystallinity of SAPO_34. The SAPO_34 which had high degree of crystallinity, showed good catalytic activity.