Oxygen Gasification of Municipal Solid Waste in a Fixed-bed Gasifier

doi:10.1016/j.cjche.2014.06.026

›› 2014, Vol. 22 ›› Issue (9): 1021-1026.DOI: 10.1016/j.cjche.2014.06.026

• 能源、资源与环境技术 • 上一篇下一篇

Oxygen Gasification of Municipal Solid Waste in a Fixed-bed Gasifier

Miaomiao Niu, Yaji Huang, Baosheng Jin, Xinye Wang

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

收稿日期:2012-12-17 修回日期:2013-03-19 出版日期:2014-09-28 发布日期:2014-11-04
通讯作者: Yaji Huang
基金资助:
Supported by the National Basic Research Program of China (2011CB201505) and the National Natural Science Foundation of China (51006023).

Oxygen Gasification of Municipal Solid Waste in a Fixed-bed Gasifier

Miaomiao Niu, Yaji Huang, Baosheng Jin, Xinye Wang

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Received:2012-12-17 Revised:2013-03-19 Online:2014-09-28 Published:2014-11-04
Supported by:
Supported by the National Basic Research Program of China (2011CB201505) and the National Natural Science Foundation of China (51006023).

摘要/Abstract

摘要： Four wastematerials, paper,wood, textile and kitchen garbage, inmunicipal solidwastewere gasified separately with oxygen in a fixed bed reactor. The yields of products char, tar and gas, the composition of gas components H₂, CO,CO₂ and CH₄, and the lower heating value (LHV)were examined at temperatures between 700 and 900℃ and equivalence ratio (ER) between 0.14 and 0.32. Characteristics of gas evolution during gasification were investigated. Results show that a higher temperature improves the formation of H₂ and CO while lowers the yield of CO₂ and CH₄. The LHV of syngas increases with temperature and varies in the range of 6-10 MJ·m^-3, reaching the maximum at 800℃ or above. As ER increases, both combustible gas component and LHV of syngas decrease while the yield of CO₂ rises linearly. The appropriate ER for obtaining high quality gas is in the range of 0.18-0.23. Temperature and ER have significant effects on the product distribution. Higher temperature and ER are favorable for higher gas yield and lower yield of char and tar in the gasification of textile and kitchen garbage. At 800℃, the gas evolution may be divided into two regions. In the first region, the flow rate of gas increases and then decreases rapidly, while in the second region the flow rate decreases monotonically to lower level.

关键词: Municipal solid waste, Oxygen gasification, Temperature, Equivalence ratio, Gas flow rate

Abstract: Four wastematerials, paper,wood, textile and kitchen garbage, inmunicipal solidwastewere gasified separately with oxygen in a fixed bed reactor. The yields of products char, tar and gas, the composition of gas components H₂, CO,CO₂ and CH₄, and the lower heating value (LHV)were examined at temperatures between 700 and 900℃ and equivalence ratio (ER) between 0.14 and 0.32. Characteristics of gas evolution during gasification were investigated. Results show that a higher temperature improves the formation of H₂ and CO while lowers the yield of CO₂ and CH₄. The LHV of syngas increases with temperature and varies in the range of 6-10 MJ·m^-3, reaching the maximum at 800℃ or above. As ER increases, both combustible gas component and LHV of syngas decrease while the yield of CO₂ rises linearly. The appropriate ER for obtaining high quality gas is in the range of 0.18-0.23. Temperature and ER have significant effects on the product distribution. Higher temperature and ER are favorable for higher gas yield and lower yield of char and tar in the gasification of textile and kitchen garbage. At 800℃, the gas evolution may be divided into two regions. In the first region, the flow rate of gas increases and then decreases rapidly, while in the second region the flow rate decreases monotonically to lower level.

Key words: Municipal solid waste, Oxygen gasification, Temperature, Equivalence ratio, Gas flow rate

Miaomiao Niu, Yaji Huang, Baosheng Jin, Xinye Wang. Oxygen Gasification of Municipal Solid Waste in a Fixed-bed Gasifier[J]. , 2014, 22(9): 1021-1026.

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Oxygen Gasification of Municipal Solid Waste in a Fixed-bed Gasifier

Oxygen Gasification of Municipal Solid Waste in a Fixed-bed Gasifier

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