Investigation on the Differences of the Alcohols Conversion over H-SAPO-34 Zeolite

doi:10.11938/cjmr20222981

Abstract

Abstract:

In this paper, the conversion of methanol and butanol and the differences in product distribution over H-SAPO-34 were investigated. Some important reaction intermediates were captured during the reaction process by using gas chromatography-mass spectrometry (GC-MS) and ¹³C cross polarization magic angle spinning nuclear magnetic resonance (¹³C CP MAS NMR) spectroscopy. In the methanol conversion process, ethene, propene and butene are the main products, while in the butanol conversion process, butanol is mainly dehydrated to form butene, and propene and butene are the main products in the initial stage. Light olefins are generated from both methanol and butanol conversion over H-SAPO-34. Furthermore, the aromatic species were observed in both retained species analysis and ¹³C CP MAS NMR, indicating that similar organic species confined in the H-SAPO-34 during the conversion of alcohols. Starting from different kinds of alcohols, the acid-catalysis environment in the confined space of H-SAPO-34 can catalyze the methanol and butanol conversion to produce light olefins.

Key words: ¹³C CP MAS NMR, alcohol conversion, molecular sieve catalysis, reaction intermediate species

CLC Number:

O482.53

Ya-ting GU, Wen-na ZHANG, Jing-feng HAN, Cai-yi LOU, Hui-hui CHEN, Shu-tao XU, Ying-xu WEI, Zhong-min LIU. Investigation on the Differences of the Alcohols Conversion over H-SAPO-34 Zeolite[J]. Chinese Journal of Magnetic Resonance, 2022, 39(4): 428-438.

Figures/Tables 5

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