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THE RESEARCHES ADVANCE AND THE APPLICATION POSSIBILITIES OF SAPO MOLECULAR SIEVES

Le Wang

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Abstract

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]

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What this paper is about

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]

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Available abstract

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]

Key concepts: Molecular sieve, Microporous material, Catalysis, Selectivity, Chemical engineering, Hydrothermal circulation, Thermal stability, Zeolite

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