Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis
© 2018. The study reports the effects of Ca and Na acetates on the transformation of nitrogen species during sewage sludge pyrolysis. Sludge samples, with or without acetates, were pyrolysed in a fix-bed reactor at 150-550 °C, and the nitrogen species in the pyrolysis products (char, tar, and gas) w...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Combustion Institute
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/72919 |
| _version_ | 1848762877264003072 |
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| author | Cheng, S. Qiao, Y. Huang, J. Wang, W. Wang, Z. Yu, Yun Xu, M. |
| author_facet | Cheng, S. Qiao, Y. Huang, J. Wang, W. Wang, Z. Yu, Yun Xu, M. |
| author_sort | Cheng, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018. The study reports the effects of Ca and Na acetates on the transformation of nitrogen species during sewage sludge pyrolysis. Sludge samples, with or without acetates, were pyrolysed in a fix-bed reactor at 150-550 °C, and the nitrogen species in the pyrolysis products (char, tar, and gas) were characterised and quantified. Ca and Na acetates distinctly affect nitrogen transformation during sludge pyrolysis, which is ascribable to their different catalytic activities for the decomposition of nitrogen species in sludge. The addition of Ca acetate is found to increase nitrogen retention in char and reduce the formation of nitrogen species in tar, which is mainly due to the suppressed decomposition of protein-N as well as the promoted formation of stable nitrogen species in char. On the other hand, the addition of Na acetate enhances the decomposition of nitrogen species in sludge, such as protein- and inorganic-N. The levels of both Ca and Na acetates are significantly reduced in the nitrogen-containing gas emissions because acetone is produced when acetates are heated, and acetone readily reacts with NH3to produce binary clusters or amines. Our results show that acetate addition is an important strategy for the reduction of NH3emission during sludge pyrolysis. |
| first_indexed | 2025-11-14T10:54:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-72919 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:54:33Z |
| publishDate | 2018 |
| publisher | Combustion Institute |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-729192018-12-13T09:35:13Z Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis Cheng, S. Qiao, Y. Huang, J. Wang, W. Wang, Z. Yu, Yun Xu, M. © 2018. The study reports the effects of Ca and Na acetates on the transformation of nitrogen species during sewage sludge pyrolysis. Sludge samples, with or without acetates, were pyrolysed in a fix-bed reactor at 150-550 °C, and the nitrogen species in the pyrolysis products (char, tar, and gas) were characterised and quantified. Ca and Na acetates distinctly affect nitrogen transformation during sludge pyrolysis, which is ascribable to their different catalytic activities for the decomposition of nitrogen species in sludge. The addition of Ca acetate is found to increase nitrogen retention in char and reduce the formation of nitrogen species in tar, which is mainly due to the suppressed decomposition of protein-N as well as the promoted formation of stable nitrogen species in char. On the other hand, the addition of Na acetate enhances the decomposition of nitrogen species in sludge, such as protein- and inorganic-N. The levels of both Ca and Na acetates are significantly reduced in the nitrogen-containing gas emissions because acetone is produced when acetates are heated, and acetone readily reacts with NH3to produce binary clusters or amines. Our results show that acetate addition is an important strategy for the reduction of NH3emission during sludge pyrolysis. 2018 Journal Article http://hdl.handle.net/20.500.11937/72919 10.1016/j.proci.2018.08.018 Combustion Institute restricted |
| spellingShingle | Cheng, S. Qiao, Y. Huang, J. Wang, W. Wang, Z. Yu, Yun Xu, M. Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis |
| title | Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis |
| title_full | Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis |
| title_fullStr | Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis |
| title_full_unstemmed | Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis |
| title_short | Effects of Ca and Na acetates on nitrogen transformation during sewage sludge pyrolysis |
| title_sort | effects of ca and na acetates on nitrogen transformation during sewage sludge pyrolysis |
| url | http://hdl.handle.net/20.500.11937/72919 |