燃料化学学报2001，Vol.29Issue(3)：223-227,5.
煤炭地下气化反应动力学特性的研究
STUDY ON THE REACTION KINETIC CHARACTER IN
UNDERGROUND COAL GASIFICATION
杨兰和 1梁杰 2项友谦3
作者信息
- 1. 中国矿业大学资源与环境科学学院,
- 2. 中国矿业大学化工与环境工程系,
- 3. 华北市政工程设计研究院,
- 折叠
摘要
Abstract
The kinetic character of CO2 reduction and H2O(g) decomposition in Liuzhuang underground coal gasification at Tangshan is studied on the basis of the experiment for reaction activity of coal coke and CO2 and H2O(g). The test apparatus, method and test procedure are introduced, and kinetic parameters of the gasification reaction for CO2 and H2O(g) have been calculated, the expressions for reaction rate is determined, and the activation energy obtained is 140.41?kJ/mol and 171.53?kJ/mol, respectively. Based on the diffusion-kinetics theories, “contraction reaction nucleus” model is established, and the relation between polyphase chemical reaction rate and temperature is analysed. The results indicate that there is a higher reduction rate for CO2 when the temperature range of reduction zone is 1?000?℃～1?100?℃ and decomposition reaction of H2O(g) is regarded as irreversible one when the temperature reaches 1?000?℃. The reaction rate of CO generation is obviously higher than that of CO2 formation. The concentration of CO in gas compositions at vent is more than seven times higher than that of CO2. The calculation value by the model can be well identical with the experiment result, which proves the correctness and rationality of the “contraction reaction nucleus” model.关键词
煤炭地下气化/二氧化碳/水蒸气/动力学特性/活化能/收缩反应核分类
矿业与冶金引用本文复制引用
杨兰和,梁杰,项友谦..煤炭地下气化反应动力学特性的研究[J].燃料化学学报,2001,29(3):223-227,5.
