Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures
Abstract A pyrolytic lignin, separated from the bio-oil generated from biomass fast pyrolysis bio-oil at 500 °C via cold-water extraction, was thermally decomposed in a drop-tube/fixed-bed reactor under inert conditions at 100–350 °C. It is found that the char yield of the pyrolytic lignin under suc...
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| Format: | Journal Article |
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Elsevier Ltd
2017
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0016236117303113 http://hdl.handle.net/20.500.11937/58624 |
| _version_ | 1848760306743902208 |
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| author | Chua, Yee Wen Yu, Yun Wu, Hongwei |
| author_facet | Chua, Yee Wen Yu, Yun Wu, Hongwei |
| author_sort | Chua, Yee Wen |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Abstract A pyrolytic lignin, separated from the bio-oil generated from biomass fast pyrolysis bio-oil at 500 °C via cold-water extraction, was thermally decomposed in a drop-tube/fixed-bed reactor under inert conditions at 100–350 °C. It is found that the char yield of the pyrolytic lignin under such fast pyrolysis conditions decreases rapidly from ~82% at 100 °C to ~23% at 350 °C. The majority of the weight loss is contributed by the significant reduction in the fraction of light aromatic oligomers (i.e., the CH2Cl2-soluble fraction) retained in the pyrolytic lignin chars, with such reductions increasing with temperature. On the contrary, there is insignificant change in the fraction of heavy aromatic oligomers (i.e., the CH2Cl2-insoluble fraction) retained in the pyrolytic lignin chars during pyrolysis at such low temperatures. It is evident that there are strong interactions between the light and heavy aromatic oligomers during thermal decomposition of the pyrolytic lignin, leading to the observed additional char formation. The main reactions during thermal decomposition of the pyrolytic lignin are the release of aliphatic and small phenolic compounds (i.e., via demethylation and decarbonylation reactions), mainly due to the breaking of ether bonds in the pyrolytic lignin structure. The char structure becomes more aromatic as temperature increases, due to the enhanced polymerization reactions at high temperatures (>250 °C). |
| first_indexed | 2025-11-14T10:13:41Z |
| format | Journal Article |
| id | curtin-20.500.11937-58624 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:13:41Z |
| publishDate | 2017 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-586242018-12-14T01:00:56Z Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures Chua, Yee Wen Yu, Yun Wu, Hongwei Abstract A pyrolytic lignin, separated from the bio-oil generated from biomass fast pyrolysis bio-oil at 500 °C via cold-water extraction, was thermally decomposed in a drop-tube/fixed-bed reactor under inert conditions at 100–350 °C. It is found that the char yield of the pyrolytic lignin under such fast pyrolysis conditions decreases rapidly from ~82% at 100 °C to ~23% at 350 °C. The majority of the weight loss is contributed by the significant reduction in the fraction of light aromatic oligomers (i.e., the CH2Cl2-soluble fraction) retained in the pyrolytic lignin chars, with such reductions increasing with temperature. On the contrary, there is insignificant change in the fraction of heavy aromatic oligomers (i.e., the CH2Cl2-insoluble fraction) retained in the pyrolytic lignin chars during pyrolysis at such low temperatures. It is evident that there are strong interactions between the light and heavy aromatic oligomers during thermal decomposition of the pyrolytic lignin, leading to the observed additional char formation. The main reactions during thermal decomposition of the pyrolytic lignin are the release of aliphatic and small phenolic compounds (i.e., via demethylation and decarbonylation reactions), mainly due to the breaking of ether bonds in the pyrolytic lignin structure. The char structure becomes more aromatic as temperature increases, due to the enhanced polymerization reactions at high temperatures (>250 °C). 2017 Journal Article http://hdl.handle.net/20.500.11937/58624 10.1016/j.fuel.2017.03.035 http://www.sciencedirect.com/science/article/pii/S0016236117303113 Elsevier Ltd restricted |
| spellingShingle | Chua, Yee Wen Yu, Yun Wu, Hongwei Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| title | Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| title_full | Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| title_fullStr | Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| title_full_unstemmed | Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| title_short | Thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| title_sort | thermal decomposition of pyrolytic lignin under inert conditions at low temperatures |
| url | http://www.sciencedirect.com/science/article/pii/S0016236117303113 http://hdl.handle.net/20.500.11937/58624 |