不同载气气氛下煤样热解特性及其动力学参数研究

doi :10.11799/ce201901026

收稿日期:2018-03-01 基金项目:国家自然科学基金项目(51704016);中国博士后科学基金资助项目(2017M620625);中央高校基本科研业务费专项资金资助项目(FRF -TP -16-076A1)

作者简介:王小华(1978 ),男,山西古县人,博士研究生,研究方向:煤炭清洁利用,E -mail:perfecter

wang @https://www.360docs.net/doc/5d16266805.html,三 通讯作者:舒新前(1963 ),男,教授,E -mail:shuxinqian@https://www.360docs.net/doc/5d16266805.html,三

引用格式:王小华,赵洪宇,宋 强,等.不同载气气氛下煤样热解特性及其动力学参数研究[J].煤炭工程,2019,51

(1):115-119.不同载气气氛下煤样热解特性及其动力学参数研究

王小华1,赵洪宇2,宋 强1,李玉环3,舒新前1

(1.中国矿业大学(北京)化学与环境工程学院,北京 100083;

2.北京科技大学土木与资源工程学院,北京 100083;

3.内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特 010000) 摘 要:为了向固定床热解烟煤制备高值燃料的工业放大提供基础数据,采用热重分析仪(TG )和热重质谱联用分析仪(TG -MS )对比研究了N 2二CH 4二CO 2二H 2以及CO 2+CH 4混合气氛下陕西榆林烟煤热解特性及动力学参数变化规律三在此基础上,采用TG -MS 研究了不同热解气氛下气体产物的释放规律三实验结果表明:煤样的热解大致可分为三个阶段,第一阶段温度区间为室温 388?;第二阶段为388 605?,第三阶段为605 1000?三N 2二CO 2+CH 4混合气氛下达到最大释放强度在505?左右,而在H 2二CH 4和CO 2气氛下CH 4最大析出强度峰向高温段推移,且CO 2气氛下CH 4最大析出温度推移最多三由于在CO 2气氛下煤样与CO 2发生气化反应过程中涉及的反应较多,因此热解反应第二阶段和第三阶段,采用二级反应(n =2)和三级反应(n =3)可以更好的描述煤的热解过程三

关键词:烟煤;热解特性;热解气氛;气体产物;动力学 中图分类号:TQ530.2 文献标识码:A 文章编号:1671-0959(2019)01-0115-05

Study on Pyrolysis Characteristics and Kinetic Parameters of Coal Samples in Different Carrier Gases

WANG Xiao -hua 1,ZHAO Hong -yu 2,SONG Qiang 1,LI Yu -huan 3,SHU Xin -qian 1

(1.School of Chemical and Environmental Engineering,China University of Mining and Technology (Beijing),Beijing 100083,China;2.School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;3.College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010000,China)Abstract :In order to provide basic data for industrial scale -up of high value fuel prepared from pyrolysis bituminous coal in fixed bed reactor,the pyrolysis characteristics and kinetic parameters of bituminous coal from Shaanxi Hongliulin in N 2,CH 4,CO 2,H 2and CO 2+CH 4mixture were studied in a thermogravimetric analyzer (TG)and thermogravimetric mass spectrometry analyzer (TG -MS).On this basis,thermogravimetric mass spectrometry analyzer (TG -MS)were used to investigate the release of gaseous products.The experimental results showed that the pyrolysis of coal sample can be divided into three stages.The first stage is temperature range from room temperature to 388?;the second stage is 388 605?;the third stage is 605 1000?.The maximum release intensity in N 2and CO 2+CH 4appeared at about 505?.In carrier gas of H 2,CH 4and CO 2,the maximum release peak of CH 4passes to the high temperature,and the maximum release temperature of CH4increases most in CO 2.The reaction between coal sample and CO 2during gasification is more involved.Therefore,the pyrolysis process of coal can be described better by second -order reaction (n =2)and three -order reaction (n =3)in the second and third stages of pyrolysis reaction.Keywords :bituminous coal;pyrolysis characteristics;pyrolysis atmosphere;gas product;kinetics

511第51卷第1期 煤 炭 工 程COAL ENGINEERING Vol.51,No.1万方数据

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