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Diethyl Ether Conversion to Ethene and Ethanol Catalyzed by Heteropoly Acids
- Source :
- ACS Omega, ACS Omega, Vol 6, Iss 13, Pp 9310-9318 (2021)
- Publication Year :
- 2021
- Publisher :
- American Chemical Society, 2021.
-
Abstract
- The conversion of diethyl ether (DEE) to ethene and ethanol was studied at a gas-solid interface over bulk and supported Bronsted solid acid catalysts based on tungsten Keggin heteropoly acids (HPAs) at 130-250 °C and ambient pressure. The yield of ethene increased with increasing reaction temperature and reached 98% at 220-250 °C (WHSV = 2.2 h-1). The most active HPA catalysts were silica-supported H3PW12O40 and H4SiW12O40 and the bulk heteropoly salt Cs2.5H0.5PW12O40. The HPA catalysts outperformed zeolites HZSM-5 and USY reported elsewhere. A correlation between catalyst activity and catalyst acid strength was established, which indicates that Bronsted acid sites play an important role in DEE elimination over HPA catalysts. The results point to the reaction occurring through the consecutive reaction pathway: DEE → C2H4 + EtOH followed by EtOH → C2H4 + H2O, where ethene is both a primary product of DEE elimination and a secondary product via dehydration of the primary product EtOH. Evidence is provided that DEE elimination over bulk HPA and high-loaded HPA/SiO2 catalysts proceeds via the surface-type mechanism.
- Subjects :
- chemistry.chemical_classification
endocrine system
Ethanol
General Chemical Engineering
Salt (chemistry)
General Chemistry
medicine.disease
Medicinal chemistry
Article
Catalysis
Chemistry
chemistry.chemical_compound
Acid strength
chemistry
Yield (chemistry)
medicine
Dehydration
Diethyl ether
Brønsted–Lowry acid–base theory
QD1-999
Subjects
Details
- Language :
- English
- ISSN :
- 24701343
- Volume :
- 6
- Issue :
- 13
- Database :
- OpenAIRE
- Journal :
- ACS Omega
- Accession number :
- edsair.doi.dedup.....132275840df596d5ace2676325b62b64