Silicoaluminophosphate number eighteen (SAPO-18): a new microporous solid acid catalyst

Jiesheng Chen; John Meurig Thomas; Paul A. Wright; Rodney P. Townsend

doi:10.1007/BF00806053

Silicoaluminophosphate number eighteen (SAPO-18): a new microporous solid acid catalyst

Jiesheng Chen, John Meurig Thomas^*, Paul A. Wright, Rodney P. Townsend

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

SAPO-18, which has a microporous framework structure related to, but crystallographically distinct from, that of the solid acid catalyst SAPO-34, was synthesized hydrothermally from a silicoaluminophosphate gel containing N,N-diisopropylethylamine as a structuredirecting template. Although both materials have similar Si/(Si + Al + P) ratios, the content of Brønsted acid sites in SAPO-18 is considerably less than that in SAPO-34. As catalysts for methanol conversion to light olefins, SAPO-18 and SAPO-34 have closely similar initial activity and selectivity, but the lifetime of SAPO-18 is distinctly superior to that of SAPO-34.

Original language	English
Pages (from-to)	241-248
Number of pages	8
Journal	Catalysis Letters
Volume	28
Issue number	2-4
DOIs	https://doi.org/10.1007/BF00806053
Publication status	Published - Jun 1994

Keywords

catalyst regeneration
coke
oxidation
zeolites

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title = "Silicoaluminophosphate number eighteen (SAPO-18): a new microporous solid acid catalyst",

abstract = "SAPO-18, which has a microporous framework structure related to, but crystallographically distinct from, that of the solid acid catalyst SAPO-34, was synthesized hydrothermally from a silicoaluminophosphate gel containing N,N-diisopropylethylamine as a structuredirecting template. Although both materials have similar Si/(Si + Al + P) ratios, the content of Br{\o}nsted acid sites in SAPO-18 is considerably less than that in SAPO-34. As catalysts for methanol conversion to light olefins, SAPO-18 and SAPO-34 have closely similar initial activity and selectivity, but the lifetime of SAPO-18 is distinctly superior to that of SAPO-34.",

keywords = "catalyst regeneration, coke, oxidation, zeolites",

author = "Jiesheng Chen and Thomas, {John Meurig} and Wright, {Paul A.} and Townsend, {Rodney P.}",

year = "1994",

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doi = "10.1007/BF00806053",

language = "English",

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journal = "Catalysis Letters",

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T1 - Silicoaluminophosphate number eighteen (SAPO-18)

T2 - a new microporous solid acid catalyst

AU - Chen, Jiesheng

AU - Thomas, John Meurig

AU - Wright, Paul A.

AU - Townsend, Rodney P.

PY - 1994/6

Y1 - 1994/6

N2 - SAPO-18, which has a microporous framework structure related to, but crystallographically distinct from, that of the solid acid catalyst SAPO-34, was synthesized hydrothermally from a silicoaluminophosphate gel containing N,N-diisopropylethylamine as a structuredirecting template. Although both materials have similar Si/(Si + Al + P) ratios, the content of Brønsted acid sites in SAPO-18 is considerably less than that in SAPO-34. As catalysts for methanol conversion to light olefins, SAPO-18 and SAPO-34 have closely similar initial activity and selectivity, but the lifetime of SAPO-18 is distinctly superior to that of SAPO-34.

AB - SAPO-18, which has a microporous framework structure related to, but crystallographically distinct from, that of the solid acid catalyst SAPO-34, was synthesized hydrothermally from a silicoaluminophosphate gel containing N,N-diisopropylethylamine as a structuredirecting template. Although both materials have similar Si/(Si + Al + P) ratios, the content of Brønsted acid sites in SAPO-18 is considerably less than that in SAPO-34. As catalysts for methanol conversion to light olefins, SAPO-18 and SAPO-34 have closely similar initial activity and selectivity, but the lifetime of SAPO-18 is distinctly superior to that of SAPO-34.

KW - catalyst regeneration

KW - coke

KW - oxidation

KW - zeolites

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DO - 10.1007/BF00806053

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EP - 248

JO - Catalysis Letters

JF - Catalysis Letters

IS - 2-4

ER -

Silicoaluminophosphate number eighteen (SAPO-18): a new microporous solid acid catalyst

Abstract

Keywords

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