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。
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〈Ca-char〈Mg-char〈raw-char〈acid washing-char. The activation energy of petroleum coke gasification dropped if blended with biomass char.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2013年第2期460-465,共6页
Chemical Industry and Engineering Progress
基金
华东理工大学煤气化及能源化工教育部重点实验室开放基金
关键词
生物质
催化气化
石油焦
动力学
修正随机孔模型
biomass
catalytic gasification
petroleum coke
kinetics
modified random pore model
