Simulation of biomass gasification process: the effect of gasifying agent
In the present work an equilibrium model (gas-solid), based on the minimization of the Gibbs energy, has been used to theoretical understanding the effect of gasification agents on the gas yield and equilibrium syngas composition of biomass gasification. The temperature approach to equilibrium for some reactions is specified in the calculation to improve the predictive capability of the equilibrium model. Results indicated that gasification agents have important influence on the performance of biomass gasification and optimal value of operation conditions is all found in the three agents (air, steam, oxygen-steam) analyzed in the present work. In air gasification, the optimal value of the equivalence ratio is 0.16 and 0.31 for H2 concentration and gasification efficiently, respectively. The optimal range of steam to carbon ratio is between 0.7 and 0.8 for the equilibrium of water-gas shift reaction and steam reforming reaction. An autothermal oxygen-steam gasification process is analyzed, the ER value is changed corresponding to SR in order to maintain the temperature at a constant value in the calculation, the optimal value of the SR is 1 and 0.09 for H2 concentration and gasification efficiently, respectively. The obtained results are in good agreement with experimental data and can be used for the development of more efficient biomass gasification process.
biomass gasification gasifying agent simulation.
He Tao Fang Yunming Wu Jinhu
Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266071,China
国际会议
广州
英文
1042-1045
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）