Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts
Hydrogen bromide is an emerging impurity of syngas formed during gasification of electronic and municipal solid waste. The influence of HBr on catalytic activity and deactivation of various Ni-based tar reforming catalysts was investigated. The data demonstrate the detrimental effect on catalytic pr...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160991 |
| _version_ | 1811690254733672448 |
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| author | Dara Khairunnisa Mohamed Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Dara Khairunnisa Mohamed Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz |
| author_sort | Dara Khairunnisa Mohamed |
| collection | NTU |
| description | Hydrogen bromide is an emerging impurity of syngas formed during gasification of electronic and municipal solid waste. The influence of HBr on catalytic activity and deactivation of various Ni-based tar reforming catalysts was investigated. The data demonstrate the detrimental effect on catalytic properties (1) occurs at HBr concentrations above 500 ppmv, (2) is more severe compared to HCl and (3) varies greatly with the catalyst structure. The characterization of spent catalysts revealed that the formation of chemisorbed Ni-Br species, enhanced Ni sintering and depletion of NiO-Al2O3 sites could be the reasons for the loss of tar reforming and water-gas shift activities. On the other hand, no significant effect of HBr on catalyst coking was observed. The comparison of different catalysts demonstrated that the negative HBr impact can be successfully mitigated by developing a nanostructured catalyst with high porosity and Ni dispersion that ensure the strong Ni-support interaction. |
| first_indexed | 2024-10-01T06:01:05Z |
| format | Journal Article |
| id | ntu-10356/160991 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:01:05Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1609912022-08-10T08:16:56Z Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts Dara Khairunnisa Mohamed Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Environmental engineering Naphthalene Nickel catalyst Hydrogen bromide is an emerging impurity of syngas formed during gasification of electronic and municipal solid waste. The influence of HBr on catalytic activity and deactivation of various Ni-based tar reforming catalysts was investigated. The data demonstrate the detrimental effect on catalytic properties (1) occurs at HBr concentrations above 500 ppmv, (2) is more severe compared to HCl and (3) varies greatly with the catalyst structure. The characterization of spent catalysts revealed that the formation of chemisorbed Ni-Br species, enhanced Ni sintering and depletion of NiO-Al2O3 sites could be the reasons for the loss of tar reforming and water-gas shift activities. On the other hand, no significant effect of HBr on catalyst coking was observed. The comparison of different catalysts demonstrated that the negative HBr impact can be successfully mitigated by developing a nanostructured catalyst with high porosity and Ni dispersion that ensure the strong Ni-support interaction. 2022-08-10T08:16:55Z 2022-08-10T08:16:55Z 2021 Journal Article Dara Khairunnisa Mohamed, Veksha, A., Lim, T. & Lisak, G. (2021). Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts. Applied Catalysis B: Environmental, 280, 119435-. https://dx.doi.org/10.1016/j.apcatb.2020.119435 0926-3373 https://hdl.handle.net/10356/160991 10.1016/j.apcatb.2020.119435 2-s2.0-85089655546 280 119435 en Applied Catalysis B: Environmental © 2020 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Naphthalene Nickel catalyst Dara Khairunnisa Mohamed Veksha, Andrei Lim, Teik-Thye Lisak, Grzegorz Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts |
| title | Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts |
| title_full | Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts |
| title_fullStr | Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts |
| title_full_unstemmed | Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts |
| title_short | Hydrogen bromide in syngas: effects on tar reforming, water gas-shift activities and sintering of Ni-based catalysts |
| title_sort | hydrogen bromide in syngas effects on tar reforming water gas shift activities and sintering of ni based catalysts |
| topic | Engineering::Environmental engineering Naphthalene Nickel catalyst |
| url | https://hdl.handle.net/10356/160991 |
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