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 H

2

CO

CO

2

and CH

4

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 H

2

and CO while lowers the yield of CO

2

and CH

4

. 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 CO

2

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.