Contents of O-containing functional groups in coals by 13C NMR analysis
The solid state high resolution 13 C CP/MAS NMR technology was employed to analyze O-containing functional groups in 4 coals. The variation and contents of inactive O-containing functional groups in the coals were obtained in combination with chemical method. The results show that the 13 C CP/MAS...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/55769 |
| _version_ | 1848759702651928576 |
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| author | Wang, Y. Zhou, J. Chen, Y. Hu, X. Zhang, Shu Lin, X. |
| author_facet | Wang, Y. Zhou, J. Chen, Y. Hu, X. Zhang, Shu Lin, X. |
| author_sort | Wang, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The solid state high resolution 13 C CP/MAS NMR technology was employed to analyze O-containing functional groups in 4 coals. The variation and contents of inactive O-containing functional groups in the coals were obtained in combination with chemical method. The results show that the 13 C CP/MAS NMR method is effective to obtain the contents of some O-containing functional groups. The contents of carboxyl and carbonyl in the low rank coal are from 0.00 to 1.41 and from 0.45 to 1.91 mol/kg, respectively. Combined with chemical method, the content of ether bond is obtained, which is from 5.33 to 10.54 mol/kg. However, the value of inactive ether bond in the coals is only from 0.04 to 0.13 mol/kg, and the occurrence of the ether bond is predominantly inactive, few of them exists in high rank coal. |
| first_indexed | 2025-11-14T10:04:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-55769 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:04:05Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-557692023-08-02T06:39:09Z Contents of O-containing functional groups in coals by 13C NMR analysis Wang, Y. Zhou, J. Chen, Y. Hu, X. Zhang, Shu Lin, X. The solid state high resolution 13 C CP/MAS NMR technology was employed to analyze O-containing functional groups in 4 coals. The variation and contents of inactive O-containing functional groups in the coals were obtained in combination with chemical method. The results show that the 13 C CP/MAS NMR method is effective to obtain the contents of some O-containing functional groups. The contents of carboxyl and carbonyl in the low rank coal are from 0.00 to 1.41 and from 0.45 to 1.91 mol/kg, respectively. Combined with chemical method, the content of ether bond is obtained, which is from 5.33 to 10.54 mol/kg. However, the value of inactive ether bond in the coals is only from 0.04 to 0.13 mol/kg, and the occurrence of the ether bond is predominantly inactive, few of them exists in high rank coal. 2013 Journal Article http://hdl.handle.net/20.500.11937/55769 restricted |
| spellingShingle | Wang, Y. Zhou, J. Chen, Y. Hu, X. Zhang, Shu Lin, X. Contents of O-containing functional groups in coals by 13C NMR analysis |
| title | Contents of O-containing functional groups in coals by 13C NMR analysis |
| title_full | Contents of O-containing functional groups in coals by 13C NMR analysis |
| title_fullStr | Contents of O-containing functional groups in coals by 13C NMR analysis |
| title_full_unstemmed | Contents of O-containing functional groups in coals by 13C NMR analysis |
| title_short | Contents of O-containing functional groups in coals by 13C NMR analysis |
| title_sort | contents of o-containing functional groups in coals by 13c nmr analysis |
| url | http://hdl.handle.net/20.500.11937/55769 |