Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal
The purpose of this paper is to investigate the change of the O-containing functional groups in Shengli (SL) brown coal upon to the pyrolysis at low temperatures and pressures. The amounts of different O-containing functional groups of SL brown coal and its resultant chars were mainly quantified by...
| Main Authors: | , , , , |
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| Format: | Conference Paper |
| Published: |
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/55287 |
| _version_ | 1848759582307909632 |
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| author | Wang, Y. Zhou, J. Xu, M. Xu, D. Zhang, Shu |
| author_facet | Wang, Y. Zhou, J. Xu, M. Xu, D. Zhang, Shu |
| author_sort | Wang, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The purpose of this paper is to investigate the change of the O-containing functional groups in Shengli (SL) brown coal upon to the pyrolysis at low temperatures and pressures. The amounts of different O-containing functional groups of SL brown coal and its resultant chars were mainly quantified by titration methods. SL brown coal was pyrolized under the conditions of 200~350°C and 1~5 MPa with holding time of 30~ 60 min. The results show that the oxygen mainly exists as carboxyl and hydroxyl functional groups in the coal, accounting for approximate 69 wt% of the total oxygen. At 300 or 350°C, the majority of carboxyl and methoxy which were mainly associated to aliphatic and side chains has disappeared, whilst more than 50% of phenolic hydroxyl group still remained in the coal at 350°C. The holding time from 30 to 60 min could cause ~10 wt% loss in phenolic hydroxyl group at 350°C. However, the effect of pressure within the range on the oxygen removal was ignorable, probably due to the low temperatures used. |
| first_indexed | 2025-11-14T10:02:10Z |
| format | Conference Paper |
| id | curtin-20.500.11937-55287 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:02:10Z |
| publishDate | 2012 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-552872017-08-24T02:17:55Z Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal Wang, Y. Zhou, J. Xu, M. Xu, D. Zhang, Shu The purpose of this paper is to investigate the change of the O-containing functional groups in Shengli (SL) brown coal upon to the pyrolysis at low temperatures and pressures. The amounts of different O-containing functional groups of SL brown coal and its resultant chars were mainly quantified by titration methods. SL brown coal was pyrolized under the conditions of 200~350°C and 1~5 MPa with holding time of 30~ 60 min. The results show that the oxygen mainly exists as carboxyl and hydroxyl functional groups in the coal, accounting for approximate 69 wt% of the total oxygen. At 300 or 350°C, the majority of carboxyl and methoxy which were mainly associated to aliphatic and side chains has disappeared, whilst more than 50% of phenolic hydroxyl group still remained in the coal at 350°C. The holding time from 30 to 60 min could cause ~10 wt% loss in phenolic hydroxyl group at 350°C. However, the effect of pressure within the range on the oxygen removal was ignorable, probably due to the low temperatures used. 2012 Conference Paper http://hdl.handle.net/20.500.11937/55287 restricted |
| spellingShingle | Wang, Y. Zhou, J. Xu, M. Xu, D. Zhang, Shu Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal |
| title | Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal |
| title_full | Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal |
| title_fullStr | Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal |
| title_full_unstemmed | Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal |
| title_short | Study on the volatilization of O-containing functional groups during the mild pyrolysis using Shengli brown coal |
| title_sort | study on the volatilization of o-containing functional groups during the mild pyrolysis using shengli brown coal |
| url | http://hdl.handle.net/20.500.11937/55287 |