Synthesis of lower olefins from C3-C4 alkanes on ZSM-5 zeolites modified with alkali metals

A. S. Trofimova, L. M. Koval', V. I. Erofeev

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

It was shown that modification of ZSM-5 zeolites by alkali metals (except for cesium) reduced their activity in the alkane conversion to olefins (on the average, by three times at 600°C) because of poisoning Broensted sites and simultaneously increased the selectivity with respect to the production of olefins (ethylene and propylene) by a factor of 3. The conversion of lower alkanes proceeds according to the cracking mechanism. Addition of alkali metals as modifiers of zeolites of this type significantly hinders the occurrence of secondary reactions.

Original languageEnglish
JournalRussian Journal of Physical Chemistry A
Volume74
Issue numberSUPPL. 3
Publication statusPublished - 2000

Fingerprint

Alkali Metals
Zeolites
Alkanes
Alkenes
zeolites
alkali metals
alkanes
alkenes
Cesium
poisoning
synthesis
propylene
cesium
ethylene
selectivity
occurrences

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Synthesis of lower olefins from C3-C4 alkanes on ZSM-5 zeolites modified with alkali metals. / Trofimova, A. S.; Koval', L. M.; Erofeev, V. I.

In: Russian Journal of Physical Chemistry A, Vol. 74, No. SUPPL. 3, 2000.

Research output: Contribution to journalArticle

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AU - Erofeev, V. I.

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AB - It was shown that modification of ZSM-5 zeolites by alkali metals (except for cesium) reduced their activity in the alkane conversion to olefins (on the average, by three times at 600°C) because of poisoning Broensted sites and simultaneously increased the selectivity with respect to the production of olefins (ethylene and propylene) by a factor of 3. The conversion of lower alkanes proceeds according to the cracking mechanism. Addition of alkali metals as modifiers of zeolites of this type significantly hinders the occurrence of secondary reactions.

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