洁净煤技术

2019, v.25;No.124(06) 71-77

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煤原位热解研究进展
Research progress on coal in-situ pyrolysis

张屿;马明明;孙鸣;马晓迅;
ZHANG Yu;MA Mingming;SUN Ming;MA Xiaoxun;International Scientific and Technological Cooperation Base for Clean Utilization of Hydrocarbon Resources;Chemical Engineering Research Center of the Ministry of Education for Advance Use Technology of Shanbei Energy;Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi;School of Chemical Engineering,Northwest University;

摘要(Abstract):

煤热解是煤炭热转化利用中最初和必经的阶段,煤受热分解会产生煤气、焦油及半焦产品等,是目前我国化工原料和能源燃料的重要来源。由于一次热解是煤热解过程的重要步骤之一,大部分的煤热解产物都直接或间接地来源于一次热解,而一次热解产物的产率和性质直接影响到二次热解对目的产物的定向调控,故二次调控对提高煤热解产物产率具有一定的局限性。笔者提出了煤原位热解的概念,以提高煤热解产物产率为目的,从直接影响煤一次热解的角度出发,对煤不同的预处理方法,包括热预处理、水热预处理、溶剂溶胀预处理、离子液体预处理以及溶胀同步负载金属离子预处理等方法进行论述,并讨论了温度、压力、热解气氛、停留时间、粒径等工艺参数条件对煤原位热解的影响,最后对未来煤热解工艺技术的发展趋势进行展望,在继续探索煤热解机理的基础上,研究不同煤预处理方式与不同工艺参数条件的优势结合,同时发展对应的煤热解工艺技术,努力提高煤原位热解的产物收率,减少环境污染。
Coal pyrolysis is the initial and necessary stage in the thermal transformation and utilization of coal. The coal gas,tar,and semi-coke products is produced by thermal decomposition of coal. It is an important source of chemical industrial feedstocks and energy fuels in China,so it is of great significance to study the pyrolysis characteristics of coal for the directional control of coal conversion process. Primary pyrolysis is one of the important steps in the coal pyrolysis process,most of the coal pyrolysis products originate directly or indirectly from the primary pyrolysis,and the yield and properties of the primary pyrolysis products directly affect the targeted regulation of the secondary pyrolysis on the target products,so the secondary regulation has certain limitations in improving the yield of coal pyrolysis products.The concept of coal in situ pyrolysis was proposed in the paper,in order to improve the yield of coal pyrolysis products. From the perspective of directly affecting the primary pyrolysis of coal,the different pretreatment methods for coal,including thermal pretreatment and hydrothermal pretreatment,solvent swelling pretreatment,ionic liquid pretreatment,and swelling simultaneous loading metal ion pretreatment were summarized,and the process parameters such as temperature,pressure,pyrolysis atmosphere,residence time,and particle size were reviewed on the in-situ pyrolysis of coal. Finally,the future development trend of coal pyrolysis technology was prospected. On the basis of continuing to explore the mechanism of coal pyrolysis,how to combine the advantages of different coal pretreatment methods and different process parameters is a question. The corresponding coal pyrolysis technology is developed to increase the yield of coal in situ pyrolysis and reduce environmental pollution.

关键词(KeyWords): 煤;原位热解;预处理;工艺参数
coal;in-situ pyrolysis;pretreatment;process parameters

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基金项目(Foundation): 国家重点研发计划资助项目(2018YFB0604603);; 国家自然科学基金资助项目(21536009,21776229);; 陕西省重点研发计划资助项目(2017ZDCXL-GY-10-03,2018ZDXM-GY-167);; 陕西省青年科技新星支持计划项目(2017KJXX-62)

作者(Author): 张屿;马明明;孙鸣;马晓迅;
ZHANG Yu;MA Mingming;SUN Ming;MA Xiaoxun;International Scientific and Technological Cooperation Base for Clean Utilization of Hydrocarbon Resources;Chemical Engineering Research Center of the Ministry of Education for Advance Use Technology of Shanbei Energy;Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi;School of Chemical Engineering,Northwest University;

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