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Methanol Conversion on Silicoaluminophosphate Molecular Sieves

1991; Elsevier BV; Linguagem: Inglês

10.1016/s0167-2991(08)60109-3

2542-6613

Shih-Tsung Yang, Sandy I Ching Wang, Chenwei Huang,

Catalytic Processes in Materials Science

Abstract Methanol conversion over large, medium and small pore silicoaluminophosphate molecular sieves, SAPO-5, SAPO-11 and SAPO-34, were studied. Small pore SAPO-34 favors the formation of lower olefins, medium pore SAPO-11 favors the formation of C 5 and C 6 + hydrocarbons, while large pore SAPO-5 favors the formation of C 7 hydrocarbons. The selectivities toward lower olefins increase with increasing temperature over SAPO-5 and SAPO-34 and also increase with increasing silicon content of SAPO-11. Lowering the partial pressure of methanol increases the selectivity toward lower olefins over SAPO-5.