A hot syngas purification system integrated with downdraft gasification of municipal solid waste
Gasification of municipal solid waste (MSW) with subsequent utilization of syngas in gas engines/turbines and solid oxide fuel cells can substantially increase the power generation of waste-to-energy facilities and optimize the utilization of wastes as a sustainable energy resources. However, purifi...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2019
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| Online Access: | https://hdl.handle.net/10356/83077 http://hdl.handle.net/10220/49741 |
| _version_ | 1826112114371067904 |
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| author | Chan, Wei Ping Veksha, Andrei Lei, Junxi Oh, Wen-Da Dou, Xiaomin Giannis, Apostolos Lisak, Grzegorz Lim, Teik-Thye |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Chan, Wei Ping Veksha, Andrei Lei, Junxi Oh, Wen-Da Dou, Xiaomin Giannis, Apostolos Lisak, Grzegorz Lim, Teik-Thye |
| author_sort | Chan, Wei Ping |
| collection | NTU |
| description | Gasification of municipal solid waste (MSW) with subsequent utilization of syngas in gas engines/turbines and solid oxide fuel cells can substantially increase the power generation of waste-to-energy facilities and optimize the utilization of wastes as a sustainable energy resources. However, purification of syngas to remove multiple impurities such as particulates, tar, HCl, alkali chlorides and sulfur species is required. This study investigates the feasibility of high temperature purification of syngas from MSW gasification with the focus on catalytic tar reforming and desulfurization. Syngas produced from a downdraft fixed-bed gasifier is purified by a multi-stage system. The system comprises of a fluidized-bed catalytic tar reformer, a filter for particulates and a fixed-bed reactor for dechlorination and then desulfurization with overall downward cascading of the operating temperatures throughout the system. Novel nano-structured nickel catalyst supported on alumina and regenerable Ni-Zn desulfurization sorbent loaded on honeycomb are synthesized. Complementary sampling and analysis methods are applied to quantify the impurities and determine their distribution at different stages. Experimental and thermodynamic modeling results are compared to determine the kinetic constraints in the integrated system. The hot purification system demonstrates up to 90% of tar and sulfur removal efficiency, increased total syngas yield (14%) and improved cold gas efficiency (12%). The treated syngas is potentially applicable in gas engines/turbines and solid oxide fuel cells based on the dew points and concentration limits of the remaining tar compounds. Reforming of raw syngas by nickel catalyst for over 20 h on stream shows strong resistance to deactivation. Desulfurization of syngas from MSW gasification containing significantly higher proportion of carbonyl sulfide than hydrogen sulfide, traces of tar and hydrogen chloride demonstrates high performance of Ni-Zn sorbents. |
| first_indexed | 2024-10-01T03:01:39Z |
| format | Journal Article |
| id | ntu-10356/83077 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:01:39Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/830772020-09-26T21:58:07Z A hot syngas purification system integrated with downdraft gasification of municipal solid waste Chan, Wei Ping Veksha, Andrei Lei, Junxi Oh, Wen-Da Dou, Xiaomin Giannis, Apostolos Lisak, Grzegorz Lim, Teik-Thye School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Syngas Purification Municipal Solid Waste Engineering::Civil engineering Gasification of municipal solid waste (MSW) with subsequent utilization of syngas in gas engines/turbines and solid oxide fuel cells can substantially increase the power generation of waste-to-energy facilities and optimize the utilization of wastes as a sustainable energy resources. However, purification of syngas to remove multiple impurities such as particulates, tar, HCl, alkali chlorides and sulfur species is required. This study investigates the feasibility of high temperature purification of syngas from MSW gasification with the focus on catalytic tar reforming and desulfurization. Syngas produced from a downdraft fixed-bed gasifier is purified by a multi-stage system. The system comprises of a fluidized-bed catalytic tar reformer, a filter for particulates and a fixed-bed reactor for dechlorination and then desulfurization with overall downward cascading of the operating temperatures throughout the system. Novel nano-structured nickel catalyst supported on alumina and regenerable Ni-Zn desulfurization sorbent loaded on honeycomb are synthesized. Complementary sampling and analysis methods are applied to quantify the impurities and determine their distribution at different stages. Experimental and thermodynamic modeling results are compared to determine the kinetic constraints in the integrated system. The hot purification system demonstrates up to 90% of tar and sulfur removal efficiency, increased total syngas yield (14%) and improved cold gas efficiency (12%). The treated syngas is potentially applicable in gas engines/turbines and solid oxide fuel cells based on the dew points and concentration limits of the remaining tar compounds. Reforming of raw syngas by nickel catalyst for over 20 h on stream shows strong resistance to deactivation. Desulfurization of syngas from MSW gasification containing significantly higher proportion of carbonyl sulfide than hydrogen sulfide, traces of tar and hydrogen chloride demonstrates high performance of Ni-Zn sorbents. NRF (Natl Research Foundation, S’pore) EDB (Economic Devt. Board, S’pore) Published version 2019-08-22T04:27:07Z 2019-12-06T15:11:22Z 2019-08-22T04:27:07Z 2019-12-06T15:11:22Z 2019 Journal Article Chan, W. P., Veksha, A., Lei, J., Oh, W.-D., Dou, X., Giannis, A., . . . Lim, T.-T. (2019). A hot syngas purification system integrated with downdraft gasification of municipal solid waste. Applied Energy, 237, 227-240. doi:10.1016/j.apenergy.2019.01.031 0306-2619 https://hdl.handle.net/10356/83077 http://hdl.handle.net/10220/49741 10.1016/j.apenergy.2019.01.031 en Applied Energy © 2019 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/). 14 p. application/pdf |
| spellingShingle | Syngas Purification Municipal Solid Waste Engineering::Civil engineering Chan, Wei Ping Veksha, Andrei Lei, Junxi Oh, Wen-Da Dou, Xiaomin Giannis, Apostolos Lisak, Grzegorz Lim, Teik-Thye A hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| title | A hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| title_full | A hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| title_fullStr | A hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| title_full_unstemmed | A hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| title_short | A hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| title_sort | hot syngas purification system integrated with downdraft gasification of municipal solid waste |
| topic | Syngas Purification Municipal Solid Waste Engineering::Civil engineering |
| url | https://hdl.handle.net/10356/83077 http://hdl.handle.net/10220/49741 |
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