Air-CO_2 and oxygen-enriched air-CO_2 biomass gasification in an autothermal downdraft gasifier: Experimental studies

Bhoopendra Pandey; Pratik N. Sheth; Yogesh K. Prajapati

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Air-CO_2 and oxygen-enriched air-CO_2 biomass gasification in an autothermal downdraft gasifier: Experimental studies

机译：Air-CO_2 and oxygen-enriched air-CO_2 biomass gasification in an autothermal downdraft gasifier: Experimental studies

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The mounting CO_2 emission and rapid depletion of fossil fuels are two significant challenges for sustaining growing energy requirements and keeping the environment clean. Biomass gasification using CO_2 as a gasifying agent may be one of the alternative techniques to tackle such emerging problems. CO_2 behaves as an inert gas at low temperatures and can be converted to CO at high temperatures. In the present study, air-CO_2 and oxygen-enriched air-CO_2 biomass gasification are successfully conducted in the autothermal reactor. The impacts of varying concentrations of CO_2 and oxygen in the gasifying agent on the performance of the gasifier are analyzed. The CO_2 content in the gasifying agent is varied from 0 to 45 vol% at two different oxygen concentrations (21 and 35 vol%). The reactor used is an Imbert-type downdraft gasifier with a thermal capacity of approximately 10 kW. The results reveal that the yield of CO in the producer gas increases compared to air gasification resulting in a higher heating value of the producer gas. However, the average temperature in the gasifier reduces with increasing CO_2 percentage in the gasifying agent. Upon increasing the O_2 fraction from 21 to 35 vol%, while keeping 30 vol% CO_2 content constant, CO content is found to upsurge from 23.96 to 31.37 vol%. The inclusion of CO_2 inside the gasifier promotes the endothermic Boudouard reaction that causes the conversion of CO_2 into CO.

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《Energy conversion & management》 |2022年第10期|116216.1-116216.11|共11页
作者
Bhoopendra Pandey; Pratik N. Sheth; Yogesh K. Prajapati;
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作者单位

Department of Mechanical Engineering, National Institute of Technology Uttarakhand, Srinagar (Garhwal), Uttarakhand 246174, India;

Department of Chemical Engineering, Birla Institute of Technology and Science-Pilani, Pilani Campus, Pilani, Rajasthan 333031, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
Air-CO_2 gasification; Oxygen-enriched air-CO_2 gasification; CO_2 conversion; Autothermal downdraft gasifier; Biomass producer gas;

Air-CO_2 and oxygen-enriched air-CO_2 biomass gasification in an autothermal downdraft gasifier: Experimental studies

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