Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal
This paper is to examine effects of inherent minerals in coal on N migration and transformation during the fast pyrolysis of Shengli brown coal at the temperatures of 773~1173 K in a bench-scale fluidized-bed quartz reactor. Based on the comparison between raw coal and acid-washed coal, we can find...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2014
|
| Online Access: | http://hdl.handle.net/20.500.11937/56342 |
| _version_ | 1848759850422501376 |
|---|---|
| author | Wang, Y. Zheng, P. Yang, S. Zhang, Shu Bai, Y. Jia, X. |
| author_facet | Wang, Y. Zheng, P. Yang, S. Zhang, Shu Bai, Y. Jia, X. |
| author_sort | Wang, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This paper is to examine effects of inherent minerals in coal on N migration and transformation during the fast pyrolysis of Shengli brown coal at the temperatures of 773~1173 K in a bench-scale fluidized-bed quartz reactor. Based on the comparison between raw coal and acid-washed coal, we can find that the alkali Na and alkaline Ca were the key reasons for the difference in N evolutions from raw coal and demineralized coal during the pyrolysis. The Na and Ca could efficiently facilitate the formation of NH 3 and inhibit the production of HCN. The metallic species had obvious catalytic effects for the conversion from tar-N to NH 3 . Meantime, the existence of alkali and alkaline metals has enhanced the cracking reactions of coal char, thus reducing the yields of char and char-N. In addition, the relative amount of pyridinic (N-6) in demineralized coal char was higher than that in raw coal, while less quternary type nitrogen (N-Q) and pyrrolic nitrogen (N-5) were found in the demineralized coal char. |
| first_indexed | 2025-11-14T10:06:26Z |
| format | Journal Article |
| id | curtin-20.500.11937-56342 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:06:26Z |
| publishDate | 2014 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-563422017-08-24T02:23:38Z Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal Wang, Y. Zheng, P. Yang, S. Zhang, Shu Bai, Y. Jia, X. This paper is to examine effects of inherent minerals in coal on N migration and transformation during the fast pyrolysis of Shengli brown coal at the temperatures of 773~1173 K in a bench-scale fluidized-bed quartz reactor. Based on the comparison between raw coal and acid-washed coal, we can find that the alkali Na and alkaline Ca were the key reasons for the difference in N evolutions from raw coal and demineralized coal during the pyrolysis. The Na and Ca could efficiently facilitate the formation of NH 3 and inhibit the production of HCN. The metallic species had obvious catalytic effects for the conversion from tar-N to NH 3 . Meantime, the existence of alkali and alkaline metals has enhanced the cracking reactions of coal char, thus reducing the yields of char and char-N. In addition, the relative amount of pyridinic (N-6) in demineralized coal char was higher than that in raw coal, while less quternary type nitrogen (N-Q) and pyrrolic nitrogen (N-5) were found in the demineralized coal char. 2014 Journal Article http://hdl.handle.net/20.500.11937/56342 restricted |
| spellingShingle | Wang, Y. Zheng, P. Yang, S. Zhang, Shu Bai, Y. Jia, X. Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal |
| title | Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal |
| title_full | Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal |
| title_fullStr | Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal |
| title_full_unstemmed | Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal |
| title_short | Influence of demineralization using acid wash on N migration and transformation during pyrolysis of Shengli brown coal |
| title_sort | influence of demineralization using acid wash on n migration and transformation during pyrolysis of shengli brown coal |
| url | http://hdl.handle.net/20.500.11937/56342 |