Acid-catalysed cellulose pyrolysis at low temperatures
© 2016 Elsevier LtdThis study reports the pyrolysis of the acid-impregnated cellulose at 50–325 °C. The presence of acid is found to significantly change cellulose pyrolysis mechanism. While the pyrolysis of raw cellulose mainly proceeds with depolymerisation reactions, the pyrolysis of the acid-imp...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier Ltd
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/58526 |
| _version_ | 1848760282248118272 |
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| author | Long, Yu Yu, Yun Chua, Yee Wen Wu, Hongwei |
| author_facet | Long, Yu Yu, Yun Chua, Yee Wen Wu, Hongwei |
| author_sort | Long, Yu |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2016 Elsevier LtdThis study reports the pyrolysis of the acid-impregnated cellulose at 50–325 °C. The presence of acid is found to significantly change cellulose pyrolysis mechanism. While the pyrolysis of raw cellulose mainly proceeds with depolymerisation reactions, the pyrolysis of the acid-impregnated cellulose is dominantly contributed by dehydration reactions. The acid impregnation process seems to weaken the hydrogen bonding networks in cellulose, promoting the formation of glucose oligomers as reaction intermediates. Due to the presence of acid in the reaction intermediates, the glucose oligomers are rapidly hydrolysed to glucose, especially at low temperatures (i.e., 100 °C) where the evaporation of produced water (via dehydration) is slow. The results also suggest that glucose is subsequently dehydrated to low molecular weight compounds at increased temperatures. The highly dehydrated cellulose further suppresses the depolymerisation reactions, resulting in a low levoglucosan yield during acid-catalysed pyrolysis of cellulose. The highly dehydrated cellulose also favours char formation likely via furanic structures which are finally transformed into aromatic structures at temperatures >300 °C. |
| first_indexed | 2025-11-14T10:13:18Z |
| format | Journal Article |
| id | curtin-20.500.11937-58526 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:13:18Z |
| publishDate | 2017 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-585262017-11-24T05:45:54Z Acid-catalysed cellulose pyrolysis at low temperatures Long, Yu Yu, Yun Chua, Yee Wen Wu, Hongwei © 2016 Elsevier LtdThis study reports the pyrolysis of the acid-impregnated cellulose at 50–325 °C. The presence of acid is found to significantly change cellulose pyrolysis mechanism. While the pyrolysis of raw cellulose mainly proceeds with depolymerisation reactions, the pyrolysis of the acid-impregnated cellulose is dominantly contributed by dehydration reactions. The acid impregnation process seems to weaken the hydrogen bonding networks in cellulose, promoting the formation of glucose oligomers as reaction intermediates. Due to the presence of acid in the reaction intermediates, the glucose oligomers are rapidly hydrolysed to glucose, especially at low temperatures (i.e., 100 °C) where the evaporation of produced water (via dehydration) is slow. The results also suggest that glucose is subsequently dehydrated to low molecular weight compounds at increased temperatures. The highly dehydrated cellulose further suppresses the depolymerisation reactions, resulting in a low levoglucosan yield during acid-catalysed pyrolysis of cellulose. The highly dehydrated cellulose also favours char formation likely via furanic structures which are finally transformed into aromatic structures at temperatures >300 °C. 2017 Journal Article http://hdl.handle.net/20.500.11937/58526 10.1016/j.fuel.2016.12.067 Elsevier Ltd restricted |
| spellingShingle | Long, Yu Yu, Yun Chua, Yee Wen Wu, Hongwei Acid-catalysed cellulose pyrolysis at low temperatures |
| title | Acid-catalysed cellulose pyrolysis at low temperatures |
| title_full | Acid-catalysed cellulose pyrolysis at low temperatures |
| title_fullStr | Acid-catalysed cellulose pyrolysis at low temperatures |
| title_full_unstemmed | Acid-catalysed cellulose pyrolysis at low temperatures |
| title_short | Acid-catalysed cellulose pyrolysis at low temperatures |
| title_sort | acid-catalysed cellulose pyrolysis at low temperatures |
| url | http://hdl.handle.net/20.500.11937/58526 |