气候变化领域集成服务门户(CCPortal): Gasification of municipal solid wastes with gypsum wastes under different gasifying environments

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DOI	10.1016/j.joei.2024.101644
	Gasification of municipal solid wastes with gypsum wastes under different gasifying environments
	Burra, Kiran Raj Goud; Hernandez, Ines Fernandez; Castaldi, Marco J.; Mavukwana, Athienkosi; Gupta, Ashwani K.
发表日期	2024
ISSN	1743-9671
EISSN	1746-0220
起始页码	114
卷号	114
英文摘要	The global increase in population and rapid urbanization has been followed by a growing generation of municipal solid wastes and construction and demolition sector wastes. This has put increasing pressure on countries around the world to come up with sustainable ways to deal with issues related to waste generation, climate change, and social and environmental degradation. This paper investigates a novel means of coutilization of municipal solid wastes (MSW) with gypsum wastes from the construction and demolition sector for energy recovery and materials recycling and explores synergistic improvement in their processed value. We investigated high-temperature pyrolysis and gasification under different gasifying environments of inert (N2), 10 % O2, 20 % CO2, and 70 % H2O at two different temperatures of 800 and 900 degrees C, in a semi-batch fixed bed reactor. Syngas obtained was analyzed for its composition and yield, while the solid residue obtained was analyzed for the crystalline phases of the inorganic content using powder-XRD (X-ray diffraction) diagnostics. These analyses revealed that increasing temperature as well as the addition of gypsum can significantly improve the carbon conversion and overall product gas yields. When comparing the gasifying environments, steam gasification provided increased syngas mass yields by up to 184 %, 425 % and 377 % respectively, as compared to CO2 gasification, O2 gasification, and pyrolysis environments. Adding gypsum at equal mass proportions (1:1) to MSW pyrolysis at 900 degrees C increased the syngas yield by 10 % compared to the non-catalytic case, while adding it at 800 degrees C reduced syngas yield by 6 % compared to the non-catalyzed pyrolytic case at 800 degrees C. Adding gypsum during O2 gasification increased the syngas yield by 25 % compared to the non-catalytic cases at 900 degrees C and increased by 12.5 % at 800 degrees C. However, the syngas yield was reduced by 84 % when gypsum was added at equal mass proportions (1:1) to steam gasification of MSW at 900 degrees C and 50 % for 800 degrees C. Adding gypsum to CO2 gasification also reduced the cumulative yield of syngas for both temperatures under investigation. However, the syngas quality was improved with gypsum addition as the yields of hydrocarbon were reduced. The char/solid residue was found to contain significant portions of CaS suggesting sulfur fixation capability of this process into the ash which can improve the ash characteristics in terms of metal recovery along with the improved waste conversion.
英文关键词	Gypsum; MSW gasification; Syngas; CaS formation; Synergistic enhancement
语种	英语
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS记录号	WOS:001236653800001
来源期刊	JOURNAL OF THE ENERGY INSTITUTE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306045
作者单位	University System of Maryland; University of Maryland College Park; City University of New York (CUNY) System; City College of New York (CUNY); University of South Africa
推荐引用方式 GB/T 7714	Burra, Kiran Raj Goud,Hernandez, Ines Fernandez,Castaldi, Marco J.,et al. Gasification of municipal solid wastes with gypsum wastes under different gasifying environments[J],2024,114.
APA	Burra, Kiran Raj Goud,Hernandez, Ines Fernandez,Castaldi, Marco J.,Mavukwana, Athienkosi,&Gupta, Ashwani K..(2024).Gasification of municipal solid wastes with gypsum wastes under different gasifying environments.JOURNAL OF THE ENERGY INSTITUTE,114.
MLA	Burra, Kiran Raj Goud,et al."Gasification of municipal solid wastes with gypsum wastes under different gasifying environments".JOURNAL OF THE ENERGY INSTITUTE 114(2024).