Effect of C3-Alcohol Impurities on Alumina-Catalyzed Bioethanol Dehydration to Ethylene: Experimental Study and Reactor Modeling Full article
| Journal |
Catalysts
ISSN: 2073-4344 |
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| Output data | Year: 2023, Volume: 13, Number: 3, Article number : 509, Pages count : 18 DOI: 10.3390/catal13030509 | ||
| Tags | Bioethanol to ethylene dehydration; Alumina catalyst; Propanol impurities; Kinetic model; Mathematical simulation; Multitubular fixed-bed reactor | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0014 |
Abstract:
The impact of feedstock impurities on catalytic process is among the crucial issues for processing real raw materials. A real and model 92%-bioethanol contaminated with 0.03−0.3%mol 1-propanol or 2-propanol were used to make ethylene on a proprietary alumina catalyst in iso-thermal flow reactor. We proposed a formal kinetic model to describe the impured bioethanol conversion to ethylene and byproducts and used it to evaluate the multitubular reactor (MTR) for 60 KTPA ethylene production. The simulated data agree well with experimental results. Under re-action-controlled conditions, C3-alcohols strongly suppress the formation of by-products and eth-ylene-from-ethanol, and slightly inhibit formation of ethylene-via-ether. It is the suppression of the ethylene-via-ether route that causes a decrease in ethanol conversion. The predominant formation of ethylene-via-ether results in an increased ethylene yield, but doubling the catalyst load is re-quired to achieve conversion as for pure feedstock. 2-Propanol has a stronger effect on dehydra-tion than 1-propanol. Diffusion inside the grains levels out the effect of C3-alcohols on the process in MTR, giving ethylene yield as high as ~98% while dehydrating a contaminated 92% ethanol. However, impurities dilute ethanol and generate propylene (which contaminates target product), these worsen feedstock consumption and ethylene productivity in MTR.
Cite:
Ovchinnikova E.V.
, Banzaraktsaeva S.P.
, Kovgan M.A.
, Chumachenko V.A.
Effect of C3-Alcohol Impurities on Alumina-Catalyzed Bioethanol Dehydration to Ethylene: Experimental Study and Reactor Modeling
Catalysts. 2023. V.13. N3. 509 :1-18. DOI: 10.3390/catal13030509 WOS Scopus РИНЦ AN OpenAlex
Effect of C3-Alcohol Impurities on Alumina-Catalyzed Bioethanol Dehydration to Ethylene: Experimental Study and Reactor Modeling
Catalysts. 2023. V.13. N3. 509 :1-18. DOI: 10.3390/catal13030509 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jan 20, 2023 |
| Accepted: | Feb 10, 2023 |
| Published online: | Feb 17, 2023 |
| Published print: | Mar 1, 2023 |
Identifiers:
| Web of science: | WOS:000955138900001 |
| Scopus: | 2-s2.0-85151442094 |
| Elibrary: | 53840674 |
| Chemical Abstracts: | 2023:684247 |
| OpenAlex: | W4322774475 |