A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2
Gasification of biomass allows for its efficient utilisation as a renewable fuel through syngas production. This work presents the different effects of gasifying agents (H2O, CO2 and H2O/CO2) on the pore structure evolution in biochar during gasification. The effects of temperature (700, 800 and 900...
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| Format: | Journal Article |
| Language: | English |
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ELSEVIER SCI LTD
2021
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| Online Access: | http://purl.org/au-research/grants/arc/DP180101788 http://hdl.handle.net/20.500.11937/91770 |
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| author | Liu, Y. Paskevicius, Mark Sofianos, M.V. Parkinson, G. Wang, Shuai Li, Chun-Zhu |
| author_facet | Liu, Y. Paskevicius, Mark Sofianos, M.V. Parkinson, G. Wang, Shuai Li, Chun-Zhu |
| author_sort | Liu, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Gasification of biomass allows for its efficient utilisation as a renewable fuel through syngas production. This work presents the different effects of gasifying agents (H2O, CO2 and H2O/CO2) on the pore structure evolution in biochar during gasification. The effects of temperature (700, 800 and 900 °C) and biomass particle size (up to 5.6 mm) were also studied. The pore structure of biochar was characterized using synchrotron small angle X-ray scattering (SAXS). The pore development in biochar during gasification in H2O/CO2 was close to that in H2O. Carbon removal is more selective in CO2 than H2O and the derived biochar displayed pore fractal features, whereas the biochars gasified in H2O and H2O/CO2 exhibited a surface fractal network due to the less selective carbon removal in the presence of H2O. The pore structure development produced by various gasifying agents was paralleled by the evolution of the aromatic structures characterized by Raman spectroscopy. The different pore structure features result from the different reactivity of carbon sites with H2O and CO2, which can be attributed to the different amounts of O-containing groups in biochar, as well as the different reactivity of H2O and CO2. Increasing temperature reduced the differences in pore structure between biochars gasified in H2O and CO2. Biomass particle size had little impact on the pore structure of biochar. |
| first_indexed | 2025-11-14T11:37:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-91770 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:37:37Z |
| publishDate | 2021 |
| publisher | ELSEVIER SCI LTD |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-917702023-06-06T03:53:04Z A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 Liu, Y. Paskevicius, Mark Sofianos, M.V. Parkinson, G. Wang, Shuai Li, Chun-Zhu Science & Technology Technology Energy & Fuels Engineering, Chemical Engineering Pore structure Biochar gasification SAXS O-containing functional groups Reactivity X-RAY-SCATTERING SMALL-ANGLE NEUTRON ACTIVATED CARBONS CHAR STRUCTURE SURFACE-AREAS POROSITY STEAM SIZE COAL DIOXIDE Gasification of biomass allows for its efficient utilisation as a renewable fuel through syngas production. This work presents the different effects of gasifying agents (H2O, CO2 and H2O/CO2) on the pore structure evolution in biochar during gasification. The effects of temperature (700, 800 and 900 °C) and biomass particle size (up to 5.6 mm) were also studied. The pore structure of biochar was characterized using synchrotron small angle X-ray scattering (SAXS). The pore development in biochar during gasification in H2O/CO2 was close to that in H2O. Carbon removal is more selective in CO2 than H2O and the derived biochar displayed pore fractal features, whereas the biochars gasified in H2O and H2O/CO2 exhibited a surface fractal network due to the less selective carbon removal in the presence of H2O. The pore structure development produced by various gasifying agents was paralleled by the evolution of the aromatic structures characterized by Raman spectroscopy. The different pore structure features result from the different reactivity of carbon sites with H2O and CO2, which can be attributed to the different amounts of O-containing groups in biochar, as well as the different reactivity of H2O and CO2. Increasing temperature reduced the differences in pore structure between biochars gasified in H2O and CO2. Biomass particle size had little impact on the pore structure of biochar. 2021 Journal Article http://hdl.handle.net/20.500.11937/91770 10.1016/j.fuel.2021.120384 English http://purl.org/au-research/grants/arc/DP180101788 http://purl.org/au-research/grants/arc/FT160100303 http://purl.org/au-research/grants/arc/LE140100075 ELSEVIER SCI LTD fulltext |
| spellingShingle | Science & Technology Technology Energy & Fuels Engineering, Chemical Engineering Pore structure Biochar gasification SAXS O-containing functional groups Reactivity X-RAY-SCATTERING SMALL-ANGLE NEUTRON ACTIVATED CARBONS CHAR STRUCTURE SURFACE-AREAS POROSITY STEAM SIZE COAL DIOXIDE Liu, Y. Paskevicius, Mark Sofianos, M.V. Parkinson, G. Wang, Shuai Li, Chun-Zhu A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 |
| title | A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 |
| title_full | A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 |
| title_fullStr | A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 |
| title_full_unstemmed | A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 |
| title_short | A SAXS study of the pore structure evolution in biochar during gasification in H2O, CO2 and H2O/CO2 |
| title_sort | saxs study of the pore structure evolution in biochar during gasification in h2o, co2 and h2o/co2 |
| topic | Science & Technology Technology Energy & Fuels Engineering, Chemical Engineering Pore structure Biochar gasification SAXS O-containing functional groups Reactivity X-RAY-SCATTERING SMALL-ANGLE NEUTRON ACTIVATED CARBONS CHAR STRUCTURE SURFACE-AREAS POROSITY STEAM SIZE COAL DIOXIDE |
| url | http://purl.org/au-research/grants/arc/DP180101788 http://purl.org/au-research/grants/arc/DP180101788 http://purl.org/au-research/grants/arc/DP180101788 http://hdl.handle.net/20.500.11937/91770 |