Abstract:

Catalytic steam gasification kinetics of Fujian anthracite using black liquor (BL) as catalyst was investigated in an isothermal thermo-gravimetric analyzer under ambient pressure in the conditions of eliminating both inner and outer diffusion effects.The relationships of coal conversion versus reaction time with different catalyst concentrations (0－10%) were determined from 850℃ to 950℃.The research showed that BL could greatly improve the gasification rate and carbon conversion, and the loading saturation level (LSL) of the BL catalyst under the experiment conditions was determined.The shrinking-core model (SCM) was used to correlate catalytic steam gasification parameters to obtain the reaction rate constants at different temperatures.Further kinetic analysis indicated that the catalytic gasification exhibited clear compensation effects.A kinetic equation including compensation effects for the catalytic steam gasification of Fujian anthracite using BL catalyst was finally presented.

摘要：

在常压热分析仪上，采用纸浆黑液催化剂对福建无烟粉煤的水蒸气气化反应动力学进行了研究，在850～950℃温度范围内测定了催化剂浓度由0增至10％时的碳转化率随气化时间的变化。结果表明，纸浆黑液具有显著提高碳转化率和气化速率的作用，进而确定了实验条件下的纸浆黑液催化剂加载饱和浓度;在此基础上采用缩芯模型关联出无烟粉煤水蒸气催化气化反应动力学参数，分析表明，该催化气化过程存在明显的补偿效应，最后给出纸浆黑液对无烟粉煤水蒸气催化气化包括补偿效应的动力学方程。