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Municipal solid wastes pyro-gasification using high-temperature flue gas as heating resource and gasifying agent.
- Source :
-
Waste management (New York, N.Y.) [Waste Manag] 2022 Jul 15; Vol. 149, pp. 114-123. Date of Electronic Publication: 2022 Jun 18. - Publication Year :
- 2022
-
Abstract
- With the implementation of municipal solid wastes (MSW) source segregation collection policy, the combustible waste components are suitable for pyrolysis treatment to recover value-added energy such as gas or oil. In this research, the volatile compounds from MSW pyrolysis were reformed by the char obtained from the same process and the high-temperature flue gas (HTFG) of 1200 °C was supplying as heating resource and gasifying agent in a tailor-made experimental set-up. The final yields and properties of the syngas, char, and oil after reforming were investigated. Experimental studies showed that the composition of HTFG had a significant influence on the products. As the HTFG being CO <subscript>2</subscript> and its flowrate increased from 0 to 4 L/min/(kg <subscript>MSW</subscript> ), the energy share in the gas first increased from 8.29 to 15.1 MJ/(kg <subscript>MSW</subscript> ) with a higher heat value (HHV) of 19.9 MJ/Nm <superscript>3</superscript> , then it decreased slightly with a further increase in the flowrate. However, as the HTFG was H <subscript>2</subscript> O or the model flue gas (consisting of CO <subscript>2</subscript> , H <subscript>2</subscript> O, O <subscript>2</subscript> and N <subscript>2</subscript> ), the higher flowrate always increased the energy share and cold gasification efficiency (CGE) in the gas products. Both CO <subscript>2</subscript> and H <subscript>2</subscript> O participated the volatiles' reforming reactions and enhanced char gasification; while the volatiles' reforming inhibited char gasification. When the flowrate of the model flue gas increased from 0 to 12.04 L/min/(kg <subscript>MSW</subscript> ), the oil and char yields decreased and the CGE increased to more than 75%, which was much higher than that from direct air gasification of MSW; moreover, the gas products had much higher HHVs. This research provides a guidance for producing high-quality syngas from the MSW.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)
- Subjects :
- Carbon Dioxide
Gases
Heating
Hot Temperature
Temperature
Refuse Disposal
Solid Waste
Subjects
Details
- Language :
- English
- ISSN :
- 1879-2456
- Volume :
- 149
- Database :
- MEDLINE
- Journal :
- Waste management (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 35728475
- Full Text :
- https://doi.org/10.1016/j.wasman.2022.06.010