In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures
This study reveals the evolution of functional groups during slow pyrolysis of crystalline and amorphous cellulose at low temperatures, using in situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy combined with two-dimensional perturbation correlation infrared spectroscopy (2D-P...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Ltd
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/60337 |
| _version_ | 1848760598583574528 |
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| author | Leng, E. Zhang, Y. Peng, Y. Gong, X. Mao, M. Li, X. Yu, Yun |
| author_facet | Leng, E. Zhang, Y. Peng, Y. Gong, X. Mao, M. Li, X. Yu, Yun |
| author_sort | Leng, E. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study reveals the evolution of functional groups during slow pyrolysis of crystalline and amorphous cellulose at low temperatures, using in situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy combined with two-dimensional perturbation correlation infrared spectroscopy (2D-PCIS). During cellulose pyrolysis, although the inter-molecular hydrogen bonds are slightly stronger, both intra- and inter-molecular hydrogen bonds can break at low temperatures (i.e., > 120 °C), leading to the formation of free hydroxyl. Due to the weakened hydrogen bonds in cellulose, dehydration reactions firstly take place to produce saturated carbonyls, at a lower temperature (i.e., 240 °C) for amorphous cellulose. At increased temperatures (i.e., > 270 °C), the hydrogen bonds in cellulose reduce more significantly, promoting the decomposition of glucopyranose rings to form double bonds (i.e., carbonyls, carboxyls and conjugated alkenes). Compared to those for amorphous cellulose, the hydrogen bonds in crystalline cellulose are more stable, thus protecting the functional groups (i.e., –CH groups, glycosidic bonds and glucopyranose rings) from rapid disruption. |
| first_indexed | 2025-11-14T10:18:19Z |
| format | Journal Article |
| id | curtin-20.500.11937-60337 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:18:19Z |
| publishDate | 2018 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-603372018-07-11T00:50:06Z In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures Leng, E. Zhang, Y. Peng, Y. Gong, X. Mao, M. Li, X. Yu, Yun This study reveals the evolution of functional groups during slow pyrolysis of crystalline and amorphous cellulose at low temperatures, using in situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy combined with two-dimensional perturbation correlation infrared spectroscopy (2D-PCIS). During cellulose pyrolysis, although the inter-molecular hydrogen bonds are slightly stronger, both intra- and inter-molecular hydrogen bonds can break at low temperatures (i.e., > 120 °C), leading to the formation of free hydroxyl. Due to the weakened hydrogen bonds in cellulose, dehydration reactions firstly take place to produce saturated carbonyls, at a lower temperature (i.e., 240 °C) for amorphous cellulose. At increased temperatures (i.e., > 270 °C), the hydrogen bonds in cellulose reduce more significantly, promoting the decomposition of glucopyranose rings to form double bonds (i.e., carbonyls, carboxyls and conjugated alkenes). Compared to those for amorphous cellulose, the hydrogen bonds in crystalline cellulose are more stable, thus protecting the functional groups (i.e., –CH groups, glycosidic bonds and glucopyranose rings) from rapid disruption. 2018 Journal Article http://hdl.handle.net/20.500.11937/60337 10.1016/j.fuel.2017.11.083 Elsevier Ltd restricted |
| spellingShingle | Leng, E. Zhang, Y. Peng, Y. Gong, X. Mao, M. Li, X. Yu, Yun In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| title | In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| title_full | In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| title_fullStr | In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| title_full_unstemmed | In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| title_short | In situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| title_sort | in situ structural changes of crystalline and amorphous cellulose during slow pyrolysis at low temperatures |
| url | http://hdl.handle.net/20.500.11937/60337 |