胜利褐煤半焦显微结构及其燃烧反应性能
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
利用固定床反应装置对胜利褐煤在650℃进行热解,所得半焦在光学显微镜下分选出惰质组占73.40%的丝质相和腐殖组占98.67%的木质相两种显微结构相组分。利用热分析考察了两种显微结构的燃烧反应性能,分析了燃烧特征参数如起燃指数、燃烬指数等,并回归得到其动力学。研究表明,丝质相为多孔状,木质相为致密状,前者比表面积约为后者的21倍;丝质相的燃烧反应性显著高于木质相;均相和缩芯模型对两类煤焦燃烧反应过程都能进行准确描述,丝质相在起燃阶段的活化能显著低于木质相,是丝质相燃烧反应性高的内在原因。
Shengli lignite was pyrolyzed under 650 ℃ in a fixed-bed reactor. Fusinitic coal( containing 73. 40% inertinite) and xyloid coal( containing 98. 67% huminite) were separated under semi-coke using optical microscope.The combustion reactivity,in terms of combustion parameters such as ignition index,burn out index,was calculated by thermogravimetric analysis. The combustion kinetics of both fusinitic coal and xyloid coal were regressively calculated. The results show that fusinitic coal and xyloid coal possess porous structure and compact structure respectively. The specific surface area of fusinitic coal is 21 times larger than that of xyloid coal. The combustion reactivity of fusinitic coal is much higher than that of xyloid coal in the "burn out"condition. Both the homogeneous and the shrinking core model can regressively fit the combustion processes of fusinitic coal and xyloid coal accurately. The activation energy of fusinitic coal is much lower than that of xyloid coal,which is the essential reason for higher combustion reactivity of fusinitic coal.
引文
[1]周师庸.应用煤岩学[M].北京:冶金工业出版社,1985.Zhou Shiyong.Application of coal petrology[M].Beijing:Metallurgical Industry Press,1985.
    [2]陈鹏.中国煤炭性质、分类和利用[M].北京:科学出版社,2007.Chen Peng.China coal properties,classification and advantages[M].Beijing:Science Press,2007.
    [3]Shulyakovskaya L V.Quantitative characteristics of hydrogenation reactivity of macerals of lignite from Kansk-Achinskoe field[J].Fuel and Energy Abstracts,1997,38(1):5.
    [4]Méndez L B,Borrego A G,Martinez-Tarazona M R,et al.Influence of petrographic and mineral matter composition of coal particles on their combustion reactivity[J].Fuel,October-December,2003,82(15-17):1875-1882.
    [5]Martina Havelcová,Ivana Sykorová,Hana Trejtnarová,et al.Identification of organic matter in lignite samples from basins in the Czech Republic:Geochemical and petrographic properties in relation to lithotype[J].Fuel,2012,99:129-142.
    [6]路继根.用热重法研究我国四种煤显微结构的燃烧特性[J].燃料化学学报,1996,24(4):329-334.Lu Jigen.Study on combustion characteristics of four Chinese coal macerals by means of thermogravimetriy[J].Journal of Fuel Chemistry and Technology,1996,24(4):329-334.
    [7]李文英,谢克昌.平朔气煤的煤岩显微结构研究[J].燃料化学学报,1992,20(4):375-383.Li Wenying,Xie Kechang.Structure characterization of macerals from Pinsshuo gas coal[J].Journal of Fuel Chemistry and Technology,1992,20(4):375-383.
    [8]路丕思.煤岩显微结构燃烧动力学特性及燃烬特性试验研究[J].电站系统工程,1994,10(2):48-54.Lu Peisi.Test and investigation on combustion dyamic characteratics of coal rock microcomponent and burn-out characteratics[J].Power System Engineering,1994,10(2):48-54.
    [9]Chen Yanyan.Characterization of chemical functional groups in macerals across different coal ranks via micro-FTIR spectroscopy[J].International Journal of Coal Geology,2012,104:22-33.
    [10]孙旭光.煤岩显微结构的活化能研究[J].地球化学,2001,30(6):599-603.Sun Xuguang.A study of activation energy of coal macerals[J].Geochimica,2001,30(6):599-603.
    [11]田鹏.煤岩显微组分对煤自燃的影响[J].能源与节能,2012(11):19-21.Tian Peng.The effect of coal macerals on the coal spontaneous combustion[J].Energy and Energy Conservation,2012(11):19-21.
    [12]傅雪海.我国褐煤资源及其物性特征[J].煤炭科学技术,2012,40(10):104-107.Fu Xuehai.China lignite resources and physical features[J].Coal Science and Technology,2012,40(10):104-107.
    [13]叶道敏.霍林河褐煤显微结构加氢液化性状的研究[J].煤田地质与勘探,2005,33(6):1-5.Ye Daomin.Huolinhe brown coal’s macerals and liquefying properties with hydrogen[J].Coal Geology&Exploration,2005,33(6):1-5.
    [14]李春柱.维多利亚褐煤科学进展[M].北京:化学工业出版社,2009.Chun zhuli.Advances in the science of Victorian brown coal[M].Beijing:Chemical Industry Press,2009.
    [15]陈琛.胜利褐煤提质及提质褐煤反应性能的研究[D].呼和浩特:内蒙古工业大学,2013.Chen Chen.Study on the upgrading process of lignite of Shengli and lignite Semicoke reactivity[D].Huhhot:Inner Mongolia University of Technology,2013.
    [16]张慧.中国煤的扫描电子显微镜研究[M].北京:地质出版社,2003:78-90.Zhang Hui.The studies of Chinese coal by scanning electron microscope[M].Beijing:Geological Publishing House,2003:78-90.
    [17]李振祥.煤炭常用标准汇编[M].北京:煤炭工业出版社,2000.Li Zhenxiang.Standard assembly of coal[M].Beijing:China Coal Industry Publishing House,2000.
    [18]何宏舟.龙岩煤不同宏观煤岩组分的颗粒及其燃烧性质实验研究[J].燃料化学学报,2006,34(1):15-19.He Hongzhou.Experimental research on the particle&combustion characteristics of Longyan anthracite with different lithotypes[J].Journal of Fuel Chemistry and Technology,2006,34(1):15-19.
    [19]胡松.煤燃烧过程中表面结构变化的SEM图像分析[J].燃料化学学报,2001,29(5):463-468.Hu Song.Study on surface structure of coal during combustion with SEM analysis[J].Journal of Fuel Chemistry and Technology,2001,29(5):463-468.
    [20]路春美,王永征.煤燃烧理论与技术[M].北京:地震出版社,2001.Lu Chunmei,Wang Yongzheng.Theory and technology of coal combustion[M].Beijing:Earthquake Publishing House,2001.
    [21]Jan Kopyscinski,Moshfiqur Rahman,Rajender Gupta,et al.K2CO3catalyzed CO2gasification of ash-free coal.Interactions of the catalyst with carbon in N2and CO2atmosphere[J].Fuel,2013,117(30):1181-1189.
    [22]Walker Philip L,Frank Rusinko,Austin L G.Gas reactions of carbon[J].Advances in Catalysis,1959,11:133-221.
    [23]Tay Hui-Ling,Li Chun-Zhu.Changes in char reactivity and structure during the gasfifcation of a Victorian brown coal:Comparison between gasification in O2and CO2[J].Fuel Processing Technology,2010,91:800-804.
    [24]Ranish J M,Walker P L.High pressure studies of the carbon-oxygen reaction[J].Carbon,1993,31(1):135-141.
    [25]谢克昌.煤炭气化技术[M].北京:化学工业出版社,2010:70-74.Xie Kechang.Coal gasification technology[M].Beijing:Chemical Industry Press,2010:70-74.
    [26]Anup Kumar Sadhukhan,Parthapratim Gupta,Ranajit Kumar Saha.Modelling of combustion characteristics of high ash coal char particles at high pressure:Shrinking reactive core model[J].Fuel,2010,89:162-169.
    [27]谢克昌.煤的结构与反应性[M].北京:科学出版社,2002:302-303.Xie Kechang.Coal structur and its reactivity[M].Beijing:Science Press,2002:302-303.
    [28]Coats A W,Redfern J P.Kinetics parameters from thermogravimetric data[J].Nature,1964,201:68-69.
    [29]郭琴琴.锡林浩特褐煤燃烧特性试验研究[J].锅炉技术,2008,39(2):45-53.Guo Qinqin.Prperty test and research on Xilinhaote lignite coal[J].Boiler Technology,2008,39(2):45-53.
    [30]刘建忠.褐煤半焦燃烧特性的热重试验研究[J].热力发电,2013,42(11):86-93.Liu Jianzhong.Thermogravimetric study on combustion characteristics of lignite semicoke[J].Thermal Power Generation,2013,42(11):86-93.
    [31]刘旭光,李保庆.褐煤的热处理改质研究[J].煤炭转化,2000,23(1):39-44.Liu Xuguang,Li Baoqing.Hydrothermal upgrading of brown coal[J].Coal Conversion,2000,23(1):39-44.
    [32]Lin Shi-Ying,Suzuki Yoshizo,Hatano Hiroyuki.Expressing nth order char-oxygen reaction initial rate under elevated pressure[J].Journal of Chemical Engineering of Japan,2000,33(5):753-760.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心