Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts

Verdeş, Orsina; Popa, Alexandru; Borcănescu, Silvana; Suba, Mariana; Sasca, Viorel

doi:10.3390/catal12091059

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Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts

by

Orsina Verdeş

,

Alexandru Popa

^*

,

Silvana Borcănescu

,

Mariana Suba

and

Viorel Sasca

“Coriolan Drăgulescu” Institute of Chemistry, Bl. Mihai Viteazul 24, 300223 Timisoara, Romania

^*

Author to whom correspondence should be addressed.

Catalysts 2022, 12(9), 1059; https://doi.org/10.3390/catal12091059

Submission received: 19 August 2022 / Revised: 13 September 2022 / Accepted: 14 September 2022 / Published: 16 September 2022

(This article belongs to the Special Issue Zeolites and Porous Materials: Insight into Catalysis and Adsorption Processes)

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Abstract

Thermogravimetric analysis (TGA) was used to evaluate the thermal stability and the amount of coke deposition resulting from the deactivation of catalysts during ethanol dehydration reaction in a fixed bed continuous flow reactor. In this study, a series of catalysts containing 30% of Pd doped and pure 12-tungstophosphoric acid and its insoluble Cs_2.5H_0.5PW₁₂O₄₀ salt supported on SBA-15 were prepared. The catalytic efficiency of ethanol dehydration reaction was also evaluated. Two types of coke are identified from the TPO (Temperature programmed oxidation) profiles and assigned to the coke precursor and hard coke, respectively. The results indicate that cesium salts reduced the formation of hard coke. The amount of total coke formed was significantly reduced by supporting the catalysts on mesoporous SBA-15 molecular sieves.

Keywords: heteropoly acid; thermogravimetric analysis; ethanol conversion; coke formation; catalyst stability; cesium salts

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MDPI and ACS Style

Verdeş, O.; Popa, A.; Borcănescu, S.; Suba, M.; Sasca, V. Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts. Catalysts 2022, 12, 1059. https://doi.org/10.3390/catal12091059

AMA Style

Verdeş O, Popa A, Borcănescu S, Suba M, Sasca V. Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts. Catalysts. 2022; 12(9):1059. https://doi.org/10.3390/catal12091059

Chicago/Turabian Style

Verdeş, Orsina, Alexandru Popa, Silvana Borcănescu, Mariana Suba, and Viorel Sasca. 2022. "Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts" Catalysts 12, no. 9: 1059. https://doi.org/10.3390/catal12091059

APA Style

Verdeş, O., Popa, A., Borcănescu, S., Suba, M., & Sasca, V. (2022). Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts. Catalysts, 12(9), 1059. https://doi.org/10.3390/catal12091059

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Thermogravimetry Applied for Investigation of Coke Formation in Ethanol Conversion over Heteropoly Tungstate Catalysts

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