期刊
WASTE MANAGEMENT
卷 90, 期 -, 页码 37-45出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2019.03.051
关键词
Gasification; Plasma; MSW; Syngas; Aspen Plus
资金
- Portuguese Foundation for Science and Technology [SFRH/BD/110787/2015]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/110787/2015] Funding Source: FCT
Gasification is an innovative and effective process which reduces the amount of waste produced by society and affords a synthetic gas with diverse applicability. In this plasma gasification study at high temperatures, a previously developed Aspen Plus model was used for municipal solid waste (MSW). The study is focused on the behavior of the equivalence ratio (ER), steam to MSW (S/MSW) ratio and gasification temperature (T), as a function of three gasification agents (air, O-2 and steam), assessing the final syngas composition. The model was validated with results from literature. The highest hydrogen yield reached 64% (molar fraction), when steam was used as gasification agent, lower values corresponding to O-2 utilization. Instead, a CO-enriched syngas was achieved under O-2 atmosphere (58%). Enhanced lower heating value (LHV) was obtained for the syngas produced when ER = 1, under oxygen atmosphere at 1500 degrees C (13 MJ/Nm(3)). This is due to the formation of CO, promoted by O-2, which constitutes an important factor in enhancing syngas LHV. Tar presence in the gasification process normally implies significant complications, but in this study, no problems were noticed since gasification occurred at higher temperatures. (C) 2019 Elsevier Ltd. All rights reserved.
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