In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char
Reforming of nascent tar from the rapid pyrolysis of a brown coal over char prepared from the same coal was studied at 750−900 °C. The reforming was very rapid and extensive, allowing only benzene (0.02% on a coal C basis), naphthalene (0.001%), and phenanthrene (0.0001%) to escape from the char bed...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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American Chemical Society
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/47733 |
| _version_ | 1848757915207335936 |
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| author | Matsuhara, T. Hosokai, S. Norinaga, K. Matsuoka, K. Li, Chun-Zhu Hayashi, J. |
| author_facet | Matsuhara, T. Hosokai, S. Norinaga, K. Matsuoka, K. Li, Chun-Zhu Hayashi, J. |
| author_sort | Matsuhara, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Reforming of nascent tar from the rapid pyrolysis of a brown coal over char prepared from the same coal was studied at 750−900 °C. The reforming was very rapid and extensive, allowing only benzene (0.02% on a coal C basis), naphthalene (0.001%), and phenanthrene (0.0001%) to escape from the char bed at an empty-bed gas residence time of less than 170 ms and 900 °C, respectively. Reforming even at 750 °C converted 96% of heavy tar (boiling point temperature >336 °C) into noncondensable gases and coke deposit over the char. Decreasing conversion of the tar into coke with increasing temperature suggested that the tar was reformed in a sequence of coking and steam gasification of the coke rather than direct steam reforming over the char. The reforming at 900 °C gave a negative coke yield due to progress of coke/char gasification faster than the coke deposition. Results of this work thus showed a possibility of complete tar reforming by intensification of contact between the char and volatiles even in the absence of a catalyst. |
| first_indexed | 2025-11-14T09:35:40Z |
| format | Journal Article |
| id | curtin-20.500.11937-47733 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:35:40Z |
| publishDate | 2010 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-477332017-09-13T15:57:07Z In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char Matsuhara, T. Hosokai, S. Norinaga, K. Matsuoka, K. Li, Chun-Zhu Hayashi, J. char pyrolysis coal in-situ tar brown coal rapid pyrolysis reforming Reforming of nascent tar from the rapid pyrolysis of a brown coal over char prepared from the same coal was studied at 750−900 °C. The reforming was very rapid and extensive, allowing only benzene (0.02% on a coal C basis), naphthalene (0.001%), and phenanthrene (0.0001%) to escape from the char bed at an empty-bed gas residence time of less than 170 ms and 900 °C, respectively. Reforming even at 750 °C converted 96% of heavy tar (boiling point temperature >336 °C) into noncondensable gases and coke deposit over the char. Decreasing conversion of the tar into coke with increasing temperature suggested that the tar was reformed in a sequence of coking and steam gasification of the coke rather than direct steam reforming over the char. The reforming at 900 °C gave a negative coke yield due to progress of coke/char gasification faster than the coke deposition. Results of this work thus showed a possibility of complete tar reforming by intensification of contact between the char and volatiles even in the absence of a catalyst. 2010 Journal Article http://hdl.handle.net/20.500.11937/47733 10.1021/ef9005109 American Chemical Society restricted |
| spellingShingle | char pyrolysis coal in-situ tar brown coal rapid pyrolysis reforming Matsuhara, T. Hosokai, S. Norinaga, K. Matsuoka, K. Li, Chun-Zhu Hayashi, J. In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char |
| title | In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char |
| title_full | In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char |
| title_fullStr | In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char |
| title_full_unstemmed | In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char |
| title_short | In-Situ Reforming of Tar from the Rapid Pyrolysis of a Brown Coal over Char |
| title_sort | in-situ reforming of tar from the rapid pyrolysis of a brown coal over char |
| topic | char pyrolysis coal in-situ tar brown coal rapid pyrolysis reforming |
| url | http://hdl.handle.net/20.500.11937/47733 |