Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal
© 2017 Elsevier LtdThis study is focused on the effects of char structure and alkali and alkaline earth metallic (AAEM) species on the changes in char-O2 reactivity for a Western Australian Collie sub-bituminous coal. The char samples used in this study were acquired from the partial gasification of...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Ltd
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/51987 |
| _version_ | 1848758815042830336 |
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| author | Li, T. Zhang, L. Dong, Li Wang, Shuai Song, Y. Wu, L. Li, Chun-Zhu |
| author_facet | Li, T. Zhang, L. Dong, Li Wang, Shuai Song, Y. Wu, L. Li, Chun-Zhu |
| author_sort | Li, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Elsevier LtdThis study is focused on the effects of char structure and alkali and alkaline earth metallic (AAEM) species on the changes in char-O2 reactivity for a Western Australian Collie sub-bituminous coal. The char samples used in this study were acquired from the partial gasification of the sub-bituminous coal in a fluidised-bed/fixed-bed reactor in pure CO2, 15% H2O balanced with Ar and a mixture of 15% H2O and CO2 (balancing gas) at 900 °C. The structural features of the chars were characterised by FT-Raman spectroscopy. The concentrations of AAEM species in the chars were determined by inductively coupled plasma – optical emission spectroscopy. The O-containing structures in char that can cause resonance effects to give enhanced Raman intensity tend to improve the retention of AAEM species in char during the gasification at 900 °C. However, these O-containing structures do not necessarily ensue a high char-O2 reactivity at low temperature. While AAEM species in char would catalyse the char-O2 reactions, they are not sufficient to determine the char-O2 reactivity. The relative ratio of small to large aromatic ring systems in char, as reflected by the Raman spectroscopy, greatly influences the char-O2 reactivity. The sub-bituminous coal in this study does not behave in the same way as the brown coal in our previous studies in terms of the factors influencing the char-O2 reactivity. |
| first_indexed | 2025-11-14T09:49:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-51987 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:49:59Z |
| publishDate | 2017 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-519872023-08-02T06:39:08Z Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal Li, T. Zhang, L. Dong, Li Wang, Shuai Song, Y. Wu, L. Li, Chun-Zhu © 2017 Elsevier LtdThis study is focused on the effects of char structure and alkali and alkaline earth metallic (AAEM) species on the changes in char-O2 reactivity for a Western Australian Collie sub-bituminous coal. The char samples used in this study were acquired from the partial gasification of the sub-bituminous coal in a fluidised-bed/fixed-bed reactor in pure CO2, 15% H2O balanced with Ar and a mixture of 15% H2O and CO2 (balancing gas) at 900 °C. The structural features of the chars were characterised by FT-Raman spectroscopy. The concentrations of AAEM species in the chars were determined by inductively coupled plasma – optical emission spectroscopy. The O-containing structures in char that can cause resonance effects to give enhanced Raman intensity tend to improve the retention of AAEM species in char during the gasification at 900 °C. However, these O-containing structures do not necessarily ensue a high char-O2 reactivity at low temperature. While AAEM species in char would catalyse the char-O2 reactions, they are not sufficient to determine the char-O2 reactivity. The relative ratio of small to large aromatic ring systems in char, as reflected by the Raman spectroscopy, greatly influences the char-O2 reactivity. The sub-bituminous coal in this study does not behave in the same way as the brown coal in our previous studies in terms of the factors influencing the char-O2 reactivity. 2017 Journal Article http://hdl.handle.net/20.500.11937/51987 10.1016/j.fuel.2017.01.076 Elsevier Ltd restricted |
| spellingShingle | Li, T. Zhang, L. Dong, Li Wang, Shuai Song, Y. Wu, L. Li, Chun-Zhu Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal |
| title | Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal |
| title_full | Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal |
| title_fullStr | Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal |
| title_full_unstemmed | Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal |
| title_short | Effects of char chemical structure and AAEM retention in char during the gasification at 900��C on the changes in low-temperature char-O2 reactivity for Collie sub-bituminous coal |
| title_sort | effects of char chemical structure and aaem retention in char during the gasification at 900��c on the changes in low-temperature char-o2 reactivity for collie sub-bituminous coal |
| url | http://hdl.handle.net/20.500.11937/51987 |