煤热解过程中多种挥发分生成特性研究  

Study on Generation Characteristics of Diversified Volatiles During Coal Pyrolysis

作　　者：秦大川 熊小鹤 陈发林 谭厚章 卢旭超 QIN Dachuan;XIONG Xiaohe;CHEN Falin;TAN Houzhang;LU Xuchao(Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou,Zhejiang 310030,China;MOE Key Laboratory of Thermo-fluid Science and Engineering,Xi’an Jiaotong University,Xi’an,Shaanxi 710049,China)

机构地区：[1]华电电力科学研究院有限公司,浙江杭州310030 [2]热流科学与工程教育部重点实验室(西安交通大学),陕西西安710049

出　　处：《广东电力》2022年第11期99-105,共7页Guangdong Electric Power

基　　金：国家自然科学基金项目(22008192)。

摘　　要：煤热解气(挥发分)组分对煤后续的热解、气化、燃烧等热化学行为有重要影响。为了测量挥发分成分,选取7种煤,测量其脱挥发分失重特性,利用气相色谱和傅里叶红外烟气分析仪对其中2种烟煤挥发分中的含碳氢、含氮、含硫等多达13种组分进行测量,并分析挥发分中的水分来源,结果表明:挥发分中体积分数最大的5种气体成分是CO、CO_(2)、H_(2)O、CH_(4)、H_(2);低温下,挥发分中H_(2)O的体积分数最大,超过40%;高温下,H_(2)体积分数最大,超过55%。煤热解气中,水分含量与热解温度、煤种密切相关,水分主要来源于煤中的酚羟基在受热后的缩合反应。Coal pyrolysis gas(volatile)components have vital impact on the coal subsequent chemical behaviors such as pyrolysis,gasification and combustion.In order to detect the specified compositions of coal volatiles,seven coals were selected for measuring the devolatilization weight loss characteristics.Meanwhile,the gas chromatography and FTIR gas analyzerthe were used to analyze 13 components of two types of coals including hydrogen-carbon,nitrogen and sulfur species.The source of moisture in volatiles was also analyzed.The results show that the first five largest species by volume fraction are CO,CO_(2),H_(2)O,CH_(4) and H_(2).Under low temperature condition,the volume fraction of H_(2)O exceeds 40%while the hydrogen gas volume fraction exceeds 55%at high temperature.In the coal pyrolysis gases,the content of moisture is closely related with pyrolysis temperature and coal categories,which is from the phenolic hydroxyl group condensation reaction after heating.

关 键 词：煤 热解 挥发分 热解气 水 

分 类 号：TM611[电气工程—电力系统及自动化] TQ541[化学工程—煤化学工程]