【摘要】 分析了部分气化焦的再气化动力学行为 ,详细描述了煤在气化过程中的阶段气化特性 ,重点考察了实验焦气化率、温度、煤种对各煤焦再气化动力学参数及阶段气化特性的影响 .结果表明 :随着实验焦气化率的改变 ,实验焦在水蒸气气氛下的动力学参数也会发生相应的变化 ;煤种与温度不但是影响煤气化速率的主要因素 ,同时也是影响煤气化阶段特性的重要因素 .更多还原

【Abstract】 Kinetic studies on char partially gasified in the fixed-bed were carried out on the thermogravimetric analyzer.The effects of char type,temperature and the gasification conversion in the fixed-bed on the kinetic parameters and the stage characteristics of gasification are discussed in this paper.Results indicate that the reactant gas-steam could activate the char.With the increase of the gasification conversion in the fixed-bed,the activation energy and the pre-exponental factor decrease,effect of the pressure of steam to gasification rate decreases(there is sometime increase of Wangfeng char at low gasification conversion).For different char types,the effects of gasification conversion in the fixed-bed on the reaction rate constant are different.Char type and temperature are important factors affecting the gasification rate.At the same time,they can also affect seriously the stage characteristics.更多还原