Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification
In this study, air, steam and CO2-enhanced gasification of rice straw was simulated using Aspen Plus™ and compared in terms of their energy, exergy and environmental impacts. It was found that the addition of CO2 had less impact on syngas yield compared with gasification temperature. At lower CO2/Bi...
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| Language: | English |
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Elsevier
2016
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| Online Access: | https://eprints.nottingham.ac.uk/53294/ |
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| author | Parvez, A.M. Mujtaba, I.M. Wu, T. |
| author_facet | Parvez, A.M. Mujtaba, I.M. Wu, T. |
| author_sort | Parvez, A.M. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In this study, air, steam and CO2-enhanced gasification of rice straw was simulated using Aspen Plus™ and compared in terms of their energy, exergy and environmental impacts. It was found that the addition of CO2 had less impact on syngas yield compared with gasification temperature. At lower CO2/Biomass mass ratios (<0.25), CO2-enhanced gasification showed a lower GSE (gasification system efficiency) than conventional gasification, which was below 22.1%. However at higher CO2/Biomass ratios, CO2-enhanced gasification demonstrated higher GSE than conventional gasification. The GSE of CO2-enhanced gasification continued to increase to 58.8% when CO2/Biomass ratio was raised to 0.87. It was also found that chemical exergy was 2.05–4.85 times higher than physical exergy. The syngas exergy increased with CO2 addition, which was mainly due to the increase in physical exergy. The maximum exergy efficiency occurred in the temperature range of 800 °C–900 °C. For CO2-enhanced gasification, exergy efficiency was found to be more sensitive to temperature than CO2/Biomass ratios. In addition, the preliminary environmental analysis showed that CO2-enhanced gasification resulted in significant environmental benefits compared with steam gasification. However novel assessment methodologies are still needed to better evaluate the advantages of CO2 utilization. |
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| format | Article |
| id | nottingham-53294 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:27:23Z |
| publishDate | 2016 |
| publisher | Elsevier |
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| spelling | nottingham-532942018-08-10T08:45:12Z https://eprints.nottingham.ac.uk/53294/ Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification Parvez, A.M. Mujtaba, I.M. Wu, T. In this study, air, steam and CO2-enhanced gasification of rice straw was simulated using Aspen Plus™ and compared in terms of their energy, exergy and environmental impacts. It was found that the addition of CO2 had less impact on syngas yield compared with gasification temperature. At lower CO2/Biomass mass ratios (<0.25), CO2-enhanced gasification showed a lower GSE (gasification system efficiency) than conventional gasification, which was below 22.1%. However at higher CO2/Biomass ratios, CO2-enhanced gasification demonstrated higher GSE than conventional gasification. The GSE of CO2-enhanced gasification continued to increase to 58.8% when CO2/Biomass ratio was raised to 0.87. It was also found that chemical exergy was 2.05–4.85 times higher than physical exergy. The syngas exergy increased with CO2 addition, which was mainly due to the increase in physical exergy. The maximum exergy efficiency occurred in the temperature range of 800 °C–900 °C. For CO2-enhanced gasification, exergy efficiency was found to be more sensitive to temperature than CO2/Biomass ratios. In addition, the preliminary environmental analysis showed that CO2-enhanced gasification resulted in significant environmental benefits compared with steam gasification. However novel assessment methodologies are still needed to better evaluate the advantages of CO2 utilization. Elsevier 2016-01-01 Article PeerReviewed application/pdf en cc_by_nc_nd https://eprints.nottingham.ac.uk/53294/1/mujtaba_energy_exergy.pdf Parvez, A.M., Mujtaba, I.M. and Wu, T. (2016) Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification. Energy, 94 . pp. 579-588. ISSN 1873-6785 CO2-enhanced gasification; Conventional gasification; Energy analysis; Exergy analysis; Environmental analysis; Biomass https://www.sciencedirect.com/science/article/pii/S0360544215015571?via%3Dihub doi:10.1016/j.energy.2015.11.022 doi:10.1016/j.energy.2015.11.022 |
| spellingShingle | CO2-enhanced gasification; Conventional gasification; Energy analysis; Exergy analysis; Environmental analysis; Biomass Parvez, A.M. Mujtaba, I.M. Wu, T. Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification |
| title | Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification |
| title_full | Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification |
| title_fullStr | Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification |
| title_full_unstemmed | Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification |
| title_short | Energy, exergy and environmental analyses of conventional, steam and CO2-enhanced rice straw gasification |
| title_sort | energy, exergy and environmental analyses of conventional, steam and co2-enhanced rice straw gasification |
| topic | CO2-enhanced gasification; Conventional gasification; Energy analysis; Exergy analysis; Environmental analysis; Biomass |
| url | https://eprints.nottingham.ac.uk/53294/ https://eprints.nottingham.ac.uk/53294/ https://eprints.nottingham.ac.uk/53294/ |