甘蔗渣热解气化特性的研究

在实验条件下,考察反应温度、升温速率、物料颗粒大小等因素对蔗渣在水蒸气中的热解气化特性的影响。实验结果表明,热解终温越高,物料粒径越小,越有利于产生高质量的热解气。在先到达热解终温,再通入水蒸气的操作条件下,升温速率的改变对气化效果的影响并不突出,而热解终温是热解气化过程主要的决定因素。实验在最佳条件,温度采用粉末物料在1 000℃进行热解可以得到高热值合成气10 M J/Nm3,和较高的产气率1.7 m3/kg。

Research on Pyrolysis Properties of Sugarcane Bagasse

In the experiment using steam as gasification agent,the conversion of biomass consists of two processes,pyrolysis and gasification,which produce gases with main constituents of H_2,CO,CO_2,CH_4,tar and carbon.The yield and distribution of products in pyrolysis depend on temperature,heating rate and grain size.According to the experiment,higher temperature and smaller size of feedstock will be propitious to produce gas with higher heating value.The impact of particle size can be interpreted by the theory of non-homogeneous reaction.Under the operating conditions of pyrolysis,temperature is the decisive factor in the reacting process,and the change of heating rate does not have much impact on the gasification.Under the optimum conditions,the created gas with high heating value of 10 MJ/Nm~3 and yield of 1.7 m~3/kg were obtained.