不连沟煤热解半焦燃烧特性研究

doi:10.16085/j.issn.1000-6613.2017-0375

化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3287-3292.DOI: 10.16085/j.issn.1000-6613.2017-0375

不连沟煤热解半焦燃烧特性研究

薛新巧^1,2, 冯钰², 靳立军², 胡浩权²

1 宁夏工商职业技术学院化工系, 宁夏银川 750021;
2 大连理工大学化工学院, 煤化工研究所精细化工国家重点实验室, 辽宁大连 116024

收稿日期:2017-03-07 修回日期:2017-04-23 出版日期:2017-09-05 发布日期:2017-09-05
通讯作者: 胡浩权,教授,主要从事煤及生物质热转化基础与应用研究。
作者简介:薛新巧(1972-),男,硕士,副教授,主要从事煤化工、甲烷催化转化制氢等研究工作。E-mail:xuexq@sina.com
基金资助:
国家自然科学基金项目（21176042）。

Combustion characteristics of pyrolysis char of Buliangou coal

XUE Xingqiao^1,2, FENG Yu², JIN Lijun², HU Haoquan²

1 Department of Chemical Industry, Ningxia Vocational Technical Collage of Industry and Commerce, Yinchuan 750021, Ningxia, China;
2 Institute of Coal Chemical Engineering, Department of Chemical Engineering, Dalian University of Technology, Dalian 116023, Liaoning, China

Received:2017-03-07 Revised:2017-04-23 Online:2017-09-05 Published:2017-09-05

摘要/Abstract

摘要： 煤热解产生具有高利用价值的煤气和焦油，并伴随产生大量的热解半焦，燃烧是半焦的主要利用途径之一。本文采用非等温热重分析法研究了热解条件（热解温度和停留时间）、热解气氛和燃烧升温速率对热解半焦燃烧行为的影响，并利用Coats-Redfern积分法对半焦燃烧过程进行动力学计算。结果表明：热解温度对甲烷二氧化碳重整与煤热解耦合过程半焦的燃烧反应特性有重要影响。随热解温度升高，半焦燃烧反应性呈下降趋势，反应活化能逐渐增加，这与半焦中较低的挥发分成正相关。热解停留时间和热解气氛对半焦燃烧影响较小。与在氮气中热解半焦相比，加氢热解和耦合热解半焦表现出几乎相同的燃烧特征和反应活化能。燃烧升温速率显著影响半焦的燃烧特性，提高燃烧升温速率促使半焦燃烧反应在更高温度下进行。

关键词: 半焦, 燃烧特性, 甲烷二氧化碳重整与煤热解, 热重分析, 动力学分析

Abstract: Coal pyrolysis is an effective and efficient method to produce coal gas,tar and clean char. The char,as the main product,is always used for combustion. To investigate the combustion performances of pyrolysis char,the non-isothermal thermal-gravity analysis was taken to study the effect of pyrolysis temperature,holding time and atmosphere on combustion of the resultant pyrolysis char of Buliangou coal in this paper. And Coats-Redfern integrate method was used to kinetic analysis of char combustion. The results showed that the pyrolysis temperature obviously influenced the combustion of char prepared by the integrated process of CO₂ reforming of CH₄ with coal pyrolysis. The combustion performance of char decreased and activation energy gradually increased with increasing pyrolysis temperature,which was positively related with low volatile in the char. Pyrolysis holding time and atmosphere had slight effect on char combustion. The char from hydropyrolysis and integrated process showed the similar combustion behaviors and activation energy as those obtained under N₂ atmosphere. The heating rate of combustion affected the char combustion characteristics. High heating rate resulted in combustion at high temperature.

Key words: coal char, combustion characteristics, integrated process of CO₂ reforming of CH₄ with coal pyrolysis, thermogravimetric analysis, kinetics analysis

中图分类号:

TQ536.1

薛新巧, 冯钰, 靳立军, 胡浩权. 不连沟煤热解半焦燃烧特性研究[J]. 化工进展, 2017, 36(09): 3287-3292.

XUE Xingqiao, FENG Yu, JIN Lijun, HU Haoquan. Combustion characteristics of pyrolysis char of Buliangou coal[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3287-3292.

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不连沟煤热解半焦燃烧特性研究

Combustion characteristics of pyrolysis char of Buliangou coal

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