Abstract: Effect of air equivalence ratio ER on rice husk gasification in an entrained-flow reactor at different temperatures is analyzed using exergy concept. The results show that the contribution of gas component to exergy value is as follows:CO>H₂>CH₄>(N₂,C₂H₄,CO₂).With ER goes up the exergy value and its efficiency increase first and then decrease for product gas,however,the residual ratio and exergy efficiency decline first and then augment for unreacted carbon. At ER 0.25 and reactor temperature 1000℃,total exergy value and exergy efficiency of product gas are 7983.95 kJ·kg^-1 and 54.35%,respectively,and at ER 0.28 and temperature 1000℃,the residual ratio and exergy efficiency of unreacted carbon are 24.82% and 21.49%,respectively. Raising temperature can lift exergy value and exergy efficiency of product gas, but reduce residual ratio and exergy efficiency of unreacted carbon.

Key words: exergy analysis, entrained-flow reactor, biomass, gasification, equivalence ratio

关键词: 火用分析, 携带流反应器, 生物质, 气化, 计量比