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Storage Stability o...
Storage Stability of Bio-oils Derived from the Catalytic Conversion of Softwood Kraft Lignin in Subcritical Water
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- Lyckeskog, Huyen, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Mattsson, Cecilia, 1970 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Åmand, Lars-Erik, 1957 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olausson, Lars, 1945 (author)
- Valmet Oyj
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- Andersson, Sven-Ingvar, 1943 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Vamling, Lennart, 1954 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Theliander, Hans, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2016-03-30
- 2016
- English.
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In: Energy & Fuels. - : American Chemical Society (ACS). - 1520-5029 .- 0887-0624. ; 30:4, s. 3097-3106
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Abstract
Subject headings
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- The stability of lignin-derived bio-oil obtained from a continuous process [base (K2CO3)-catalyzed, using phenol as a capping agent] under subcritical conditions of water (25 MPa, 290-370 degrees C) was investigated. The lignin-derived bio-oil obtained was stored at ambient temperature for 2 years. Our results show that the base concentration in the feed solution affects the stability of this lignin-derived bio-oil during its long-term storage. It was found that, at low base concentrations (i.e., 0.4%-1.0%), the yields of all lignin-derived bio-oil fractions were relatively stable. At high base concentrations (i.e., 1.6%-2.2%), however, the yield of high-molecular-weight (high-Mw) structures increased and that of low-molecular-weight (low-Mw) structures decreased after storage. This indicated that the low-Mw materials had been polymerized to form high-Mw materials. In addition, it was found that the yield of gas chromatography-mass spectrometry (GC-MS)-identified compounds (excluding phenol) in this lignin-derived bio-oil decreased from 15% to 11%. This is probably due to the presence of solids in these lignin derived bio-oils, which promotes the catalytic polymerization reactions, suggesting that it is beneficial to remove the solids from this lignin-derived bio-oil in order to enhance its stability. Compared to the results obtained from bio-oil derived from biomass pyrolysis, our results show that bio-oil derived from the conversion of lignin in subcritical water has better chemical stability during long-term storage.
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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