摘要
为探究不同变质程度煤的气化反应性,采用下落式固定床反应器,以CO_(2)为气化剂,对11种不同变质程度煤的气化反应性进行了实验研究,考察了煤的气化反应性与挥发分、固定碳、碳含量及灰组成的相互关系。研究结果表明,在1 400℃下,11种不同变质程度煤的气化反应性仍有较为明显的差异,低变质程度煤的气化反应性远高于中/高变质程度煤的气化反应性,其完全气化反应所需时间和气化反应指数最大有7倍之差;从工业分析和元素分析看,挥发分、固定碳和碳含量与煤气化反应性均具有较好的相关性,相关系数为0.88以上;从灰组成分析看,碱性指数与煤气化反应性相关性较差。为此,可根据煤的挥发分、固定碳和碳含量等组成信息预测煤气化反应性的优劣,为煤气化应用提供参考。
In order to explore the gasification reactivity of coal with different metamorphic grades,the gasification reactivity of 11 kinds of coal with different metamorphic grades was studied by using a drop-type fixed bed reactor with CO_(2) as the gasification agent.The relationship between gasification reactivity and volatile matter,fixed carbon,carbon content and ash composition was investigated.The results show that there are still obvious differences in the gasification reactivity of 11 kinds of coal with different metamorphic degrees at 1400℃.The gasification reactivity of low metamorphic degree coal is much higher than that of medium/high metamorphic degree coal,and the time required for complete gasification reaction is 7 times higher than that of gasification reaction index.From the perspective of industrial analysis and elemental analysis,volatile matter,fixed carbon and carbon content have a good correlation with coal gasification reactivity,and the correlation coefficient is more than 0.88.From the analysis of ash composition,the correlation between alkalinity index and coal gasification reactivity is poor.Therefore,the advantages and disadvantages of coal gasification reactivity can be predicted according to the composition information of volatile matter,fixed carbon and carbon content of coal,which can provide reference for coal gasification application.
作者
任立伟
魏蕊娣
Ren Liwei;Wei Ruidi(Hebei Province Key Laboratory of Heterocyclic Compounds,Handan University,Handan 056005,China)
出处
《煤炭与化工》
CAS
2024年第2期110-114,共5页
Coal and Chemical Industry
基金
国家自然科学基金项目(21706047)
河北省"三三三人才工程"资助项目(A202102018)。
关键词
煤
气化
反应性
变质程度
气化反应性指数
煤组成
coal
gasification
reactivity
degree of metamorphism
gasification reactivity index
coal composition
