Abstract: The reaction kinetics of straw catalytic gasification was investigated in a thermogravimetric analyzer. Also the catalytic gasification of char from co-gasification of petroleum coke and biomass was studied. A modified random pore model was used to correlate the relationship between gasification rate and carbon conversion rate. The apparent activation energy and pre-exponential factors of biomass with different catalysts were obtained. The results indicated that the gasification activity of biomass semi-char with catalysts was enhanced apparently. The catalytic activity order of different chars was found to be K-char>Ca-char> Mg-char>raw-char>acid washing-char. The increase of the gasification rate of petroleum coke blended with biomass indicated that the gasification reaction is enhanced by biomass char. The apparent activation energy order of different chars in gasification is K-char

Key words: biomass, catalytic gasification, petroleum coke, kinetics, modified random pore model

摘要： 采用恒温热重分析法对稻草的催化气化反应动力学进行了研究，同时研究了生物质对石油焦气化的催化作用。采用修正随机孔模型对气化反应转化速率与转化率的关系进行了拟合计算，得到生物质焦气化的活化能和指前因子。结果表明，加入催化剂后半焦的气化反应活性增大，活性顺序为：加入K+半焦> 加入Ca2+半焦> 加入Mg2+半焦> 原半焦> 酸洗后半焦，表明了生物质焦能明显提高石油焦的气化活性。不同半焦气化的活化能大小顺序为：加入K+半焦<加入Ca2+半焦<加入Mg2+半焦<原半焦<酸洗后半焦，表明了生物质半焦的加入能降低石油焦气化的活化能。

关键词: 生物质, 催化气化, 石油焦, 动力学, 修正随机孔模型