Miscanthus Bioprocessing Using HNO3-Pretreatment to Improve Productivity and Quality of Bioethanol and Downstream Ethylene Full article
| Journal |
Industrial Crops and Products
ISSN: 0926-6690 , E-ISSN: 1872-633X |
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| Output data | Year: 2022, Volume: 177, Article number : 114448, Pages count : 12 DOI: 10.1016/j.indcrop.2021.114448 | ||||
| Tags | Miscanthus to ethylene via ethanol, Complete ethanol production cycle, Nitric acid pretreatment, Substrate-fed pre-saccharification, Bioethanol impurities, Alumina-catalyzed dehydration | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0014 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | FUFE-2021-0007 (121061500030-3) |
Abstract:
Miscanthus, which can grow on marginal lands and capture CO2, has great potential as an industrial crop. A complete cycle to convert Miscanthus Sacchariflorus, grown in Western Siberia (Russia), into bioethanol has successfully been implemented on a pilot scale and employed in downstream ethylene production for the first time. The Miscanthus bioprocessing technology involved mechanical comminution; HNO3-pretreatment; hydrolysis with commercial enzymes CelloLux-A and BrewZyme BGX; pre-saccharification with substrate feed; dSSF with non-GMO Saccharomyces cerevisiae Y-1693 supplemented with or without (NH4)2SO4, KH2PO4 and yeast extract; rectification; and alumina-catalyzed dehydration to ethylene. Here we discussed pulp reactivity, yield and composition of Miscanthus products at each step, and compared the quality of the bioethanol obtained in the study with published data. The pulp feeding from 80 to 100 g/L resulted in a bioethanol yield of ~40 g/L. It is the HNO3 pretreatment that provided pure bioethanol with an impurity content as low as 6.5 g/L. Bioethanol (92%-w) contained ~0.85 g/L impurities, mainly n-propanol and isobutanol; the latter weakly influenced the catalyst activity in ethylene production. The supplement slightly increased the yields of bioethanol and fusel alcohols, thereby reduced the yield of byproducts and improved the ethylene quality. The achieved yields of bioethanol and ethylene were 260 L and 115 kg per 1 ton Miscanthus, respectively. The expected yield of absolute ethylene under pilot-scale conditions can be 122 kg/ton Miscanthus.
Cite:
Skiba E.A.
, Ovchinnikova E.V.
, Budaeva V.V.
, Banzaraktsaeva S.P.
, Kovgan M.A.
, Chumachenko V.A.
, Mironova G.F.
, Kortusov A.N.
, Parmon V.N.
, Sakovich G.V.
Miscanthus Bioprocessing Using HNO3-Pretreatment to Improve Productivity and Quality of Bioethanol and Downstream Ethylene
Industrial Crops and Products. 2022. V.177. 114448 :1-12. DOI: 10.1016/j.indcrop.2021.114448 WOS Scopus РИНЦ ANCAN OpenAlex
Miscanthus Bioprocessing Using HNO3-Pretreatment to Improve Productivity and Quality of Bioethanol and Downstream Ethylene
Industrial Crops and Products. 2022. V.177. 114448 :1-12. DOI: 10.1016/j.indcrop.2021.114448 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Jul 16, 2021 |
| Accepted: | Dec 19, 2021 |
| Published online: | Dec 28, 2021 |
| Published print: | Mar 1, 2022 |
Identifiers:
| Web of science: | WOS:000740179500003 |
| Scopus: | 2-s2.0-85122026471 |
| Elibrary: | 47547688 |
| Chemical Abstracts: | 2022:1025412 |
| Chemical Abstracts (print): | 178:314387 |
| OpenAlex: | W4200003616 |