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'Lignin and extract...
'Lignin and extractives first' conversion of lignocellulosic residual streams using UV light from LEDs
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- Hynynen, Jonna, 1987 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Riddell, Alexander Michael, 1996 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Achour, Abdenour, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Takacs, Zoltan (författare)
- Gothenburg University,Göteborgs universitet,Svenskt NMR-centrum vid Göteborgs universitet,Swedish NMR Centre at Göteborg University,University of Gothenburg
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- Wallin, M. (författare)
- Södra Skogsägarna ekonomisk förening
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- Parkas, J. (författare)
- Södra Skogsägarna ekonomisk förening
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- Bernin, Diana, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2021
- 2021
- Engelska.
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Ingår i: Green Chemistry. - : Royal Society of Chemistry (RSC). - 1463-9262 .- 1463-9270. ; 23, s. 8251-8259
- Relaterad länk:
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https://pubs.rsc.org...
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Lignocellulosic biomass, especially lignin and extractives, has the potential to substitute fossil precursors in the chemical industry. The conversion of lignin has been intensively researched, but challenges remain as high temperatures and increased pressure are commonly used, which is not energy efficient. Lignin and wood extractives bear chromophoric groups that can absorb light in the ultraviolet (UV) region, which enables photochemical reactions. Ultraviolet light emitting diodes (UV-LEDs) are an emerging technology; they are cheap, versatile, and energy-efficient compared to existing mercury lamps. UV-LEDs were used in this study as a proof of concept for the valorisation of a lignocellulosic residual stream from the pulp and paper industry, sawdust. In a process at ambient temperature and pressure and without the use of a catalyst, we have shown that lignin and extractives can be valorised using light from UV-LEDs. Simplified lignin model compounds were used to pinpoint chemical reactions during irradiation, and to ease the analysis of the sawdust samples. The rate of conversion upon irradiation of the model compounds was found to be 0.7-2.3 g L-1 h(-1), depending on the concentration of the starting compounds.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Bioenergi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bioenergy (hsv//eng)
Nyckelord
- hydrogen-peroxide
- model compounds
- depolymerization
- excitation
- fractionation
- suppression
- products
- spruce
- Chemistry
- Science & Technology - Other Topics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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