摘要
磷酸硅铝分子筛 (SAPO)是由 Si O2 、Al O2 - 、PO2 +三种四面体单元构成的微孔型晶体 ,它的物化性质不仅类似于硅铝沸石 ,同时具有某些铝磷酸盐分子筛的特性 ,是一种具有优异的择形选择性以及热稳定性和湿热稳定性的新催化材料。在此论述了 SAPO的结构类型及适用的催化反应体系 ,并对它作为甲醇转化制低碳烯烃过程催化剂和汽车尾气净化催化剂载体的应用前景作了展望。
Silicoaluminophosphate molecular(SAPO) sieves are microporous crystals with the structure of SiO 2、AlO 2 -、PO 2 + tetrahedral units. The physical—chemical properties of SAPO are not only similar to silicoalumino zeolites but also similar to some aluminophosphate zeolites. SAPO is a novel class of catalytic materials which exhibit excellent shape—selectivity、thermal and hydrothermal stability. The structures of various SAPO and their suitable catalytic reaction systems were described in this paper. The application possibilities of SAPO as catalysts in the conversion of methanol to light olefins or supports of catalysts for the automotive exhaust control were also prospected. [WT5HZ]
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2000年第1期55-59,共5页
Chemical Reaction Engineering and Technology
基金
广东省自然科学基金!资助项目 (980 512 )
