摘要
为解决我国高灰熔融性煤的利用难题,采用等温热重法,研究了典型贵州高灰熔融性煤焦在不同气化温度及不同水蒸气含量下的气化特性,并采用混合反应模型对试验数据进行处理,求取动力学参数。结果表明,在不同水蒸气含量下,随着气化反应温度的升高,典型贵州煤焦的反应性提高,气化反应速率的峰值增大,气化反应时间缩短;气化剂中水蒸气含量越多,煤焦反应性越好,气化反应速率的峰值越大,但当水蒸气含量大于30%后差别不明显;典型贵州煤焦与水蒸气反应的反应级数为0.912 9~1.620 9,活化能为149.34~165.12 k J/mol。
In order to take full advantage of high ash fusion coal,the gasification characteristics of typical Guizhou high ash fusion coal char under different gasification temperature and steam concentration were studied by isothermal thermogravimetry. The mixed reaction model was used to process the test data and the kinetic parameters were obtained. The results showed that,with the increase of gasification reaction temperature,the reactivity was improved,the peak value of gasification reaction rate increased,the gasification reaction time was shortened under different steam concentration. The more steam in gasification agent,the better the reactivity of coal char,the larger the peak value of gasification reaction rate. When the steam concentration was more than 30%,the difference was not obvious. The reaction index of typical Guizhou char gasification with steam was between 0. 912 9 and 1. 620 9,the activation energy was between 149. 34 k J / mol and165. 12 k J / mol.
出处
《洁净煤技术》
CAS
2016年第3期34-39,共6页
Clean Coal Technology
基金
国家高技术研究发展计划(863计划)资助项目(2013AA051101)
关键词
高灰熔融性煤焦
水蒸气
气化特性
动力学
high ash fusion coal char
steam
gasification characteristic
kinetics
