全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

含氧官能团对提质褐煤复吸水特性的影响

DOI: 10.13334/j.0258-8013.pcsee.2014.35.004, PP. 6279-6285

Keywords: 褐煤,热解提质,含氧官能团,傅里叶转换红外光谱,复吸水

Full-Text   Cite this paper   Add to My Lib

Abstract:

选取云南昭通(Zhaotonglignite,ZT)褐煤,在不同温度(200~500℃)和气氛(氮气、有机、微氧)下进行热解提质,用恒温恒湿箱考察了提质煤的复吸水特性,采用傅里叶转换红外光谱(Fouriertransforminfraredspectroscopy,FTIR)分析了提质过程中煤表面含氧官能团相对含量的变化及其对提质煤复吸水性的影响。结果表明,随着提质温度的升高,提质煤中含氧官能团总量减少,复吸水率降低;羟基(—OH)和羰基(C=O)是影响复吸水率的主要含氧官能团;3种提质气氛下提质煤的复吸水率大小顺序为:微氧>氮气>有机气氛,这是由于微氧气氛下氧气氧化了部分脂肪烃结构,增加了提质煤中—OH、C=O和—O—的含量,导致了复吸水率较氮气气氛增大,而有机气氛下,乙醇分解产生的—OH促进了煤中—OH的缩合作用,降低了提质煤中—OH的含量,导致复吸水率相比氮气气氛减小。

References

[1]  Yu J L,Tahmasebi A,Han Y N,et al.A review on water in low rank coals: The existence, interaction with coal structure and effects on coal utilization[J].Fuel Processing Technology,2013,106(2):9-20.
[2]  刘明强,刘建忠,王瑞坤,等.热解温度对褐煤半焦成浆特性影响的实验研究[J].中国电机工程学报,2013,33(8):36-43.Liu Mingqiang,Liu Jianzhong,Wang Ruikun,et al.Effects of pyrolysis temperature on slurry ability of lignite semi-coke[J].Proceedings of the CSEE,2013,33(8):36-43(in Chinese).
[3]  Kang T J,Namkung H,Xu L H,et al.The drying kinetics of Indonesian low rank coal (IBC) using a lab scale fixed-bed reactor and thermobalance to apply catalytic gasification process[J].Renewable Energy,2013(54):114-138.
[4]  Muthusamy K,Wu Z H,Arun S. M.Low-rank coal drying technologies current status and new developments [J].Drying Technology,2009,27(3):403-415.
[5]  赵卫东,刘建忠,周俊虎,等.褐煤等温脱水热重分析[J].中国电机工程学报,2009,29(14):74-79.Zhao Wei dong,Liu Jianzhong,Zhou Junhu,et al. Investigation on the isothermal dewatering of brown coal by thermobalance[J].Proceedings of the CSEE,2009,29(14):74-79(in Chinese).
[6]  屈进州,陶秀祥,刘金艳,等.褐煤提质技术研究进展[J].煤炭科学技术,2011,39(11):121-125.Qu Jinzhou,Tao Xiuxiang,Liu Jinyan,et al.Research progress on upgrading technology of lignite[J].Coal Science and Technology,2011,39(11):121-125(in Chinese).
[7]  张双全.煤及煤化学[M].北京:化学工业出版社,2013:105-151.Zhang Shuangquan.Coal and coal chemistry[M]. Beijing:Chemical Industry Press,2013:105-151(in Chinese).
[8]  You C F,Wang H M,Zhang K.Moisture adsorption properties of dried lignite[J].Energy & Fuel,2013,27 (1):177-182.
[9]  沈望俊,刘建忠,虞育杰,等.锡盟褐煤干燥和重吸收特性的实验研究[J].中国电机工程学报,2013,33 (17):1-8.Shen Wangjun,Liu Jianzhong,Yu yujie,et al.Experimental study on drying and reabsorption of the lignite of Ximeng[J].Proceedings of the CSEE,2013,33(17):1-8(in Chinese).
[10]  李先春,余江龙,胡广涛,等.印尼褐煤干燥和水分再吸收特性的试验研究[J].现代化工,2009(S1),5-7.Li Xianchun,Yu Jianglong,Hu Guangtao,et al.Experimental study on drying and moisture adsorption characteristics of an Indonesian lignite[J].Modern Chemical Industry,2009(S1),5-7(in Chinese).
[11]  Ogunsola O I.Thermal upgrading effect on oxygen distribution in lignite[J].Fuel Processing Technology,1993(34):73-81.
[12]  Sakaguchi M,Laursen K,Nakagawa H,et al.Hydrothermal upgrading of Loy Yang brown coal—effect of upgrading conditions on the characteristics of the products[J].Fuel Processing Technology,2008(89):391-396.
[13]  孙成功,吴家珊,李保庆.低温热改质煤表面性质变化及其对浆体流变特性的影响[J].燃料化学学报,1996,24(2):174-180.Sun Chenggong,Wu Jiashan,Li Baoqing.Surface properties of thermally upgrading low-rank coals and their effect on the rheological behavior of coal water slurry [J].Fuel Chemistry and Technology,1996,24(2):174-180(in Chinese).
[14]  王娜,朱书全,杨玉立,等.含氧官能团对褐煤热态提质型煤防水性的影响[J].煤炭科学技术,2010,38(3):125-128.Wang Na,Zhu Shuquan,Yang Yuli,et al.Oxygen- containing function groups affected to waterproof of thermal upgraded lignite briquettes[J].Coal Science and Technology,2010,38(3):125-128(in Chinese).
[15]  Choi H,Thiruppathiraja C,Kim S,et al.Moisture readsorption and low temperature oxidation characteristics of upgraded low rank coal[J].Fuel Processing Technology,2011(92):2005-2010.
[16]  Li D,Zhang C,Xia J,et al.Evolution of organic sulfur in the thermal upgrading process of Shengli lignite [J].Energy & Fuel,2013,27(6):3446-3453.
[17]  Tahmasebi A,Yu J L,Han Y N,et al.A study of chemical structure changes of Chinese lignite during fluidized-bed drying in nitrogen and air[J].Fuel Processing Technology,2012(101):85-93.
[18]  Ibarra J,Edgar M,Rafael M.FTIR study of the evolution of coal structure during the coalification process [J].Pergamon,1996,24(6-7):725-735.
[19]  李春柱.维多利亚褐煤科学进展[M].北京:化学工业出版社,2009:29-36.Li Chunzhu.Advances in the science of Victorian brown coal[M].Beijing:Chemical Industry Press,2009:29-36(in Chinese).
[20]  谢克昌.煤的结构与反应性[M].北京:科学出版社,2002:115-130.Xie Kechang.Coal structure and it reactivity[M].Beijing:Science Press,2002:115-130(in Chinese).
[21]  李先春.褐煤提质及其燃烧行为特性的研究[D].大连:大连理工大学,2011.Li Xianchun.Experimental study on lignite upgrading and the effects on combustion characteristics[D].Dalian:Dalian :Dalian University of Technology,2011(in Chinese).
[22]  Wang H H.Kinetic analysis of dehydration of a bituminous coal using the TGA technique[J].Energy & Fuels,2007,21(6):3070-3075.
[23]  Tapas C A,Cjarles J C,Victor R V.Effect of thermal pretreatment on equilibrium moisture content of lignocellulosic biomass[J].Bioresource Technology,2011,102(7):4849-4854.
[24]  郝宏蒙,杨海平,刘汝杰,等.烘焙对典型农业秸秆吸水性能的影响[J].中国电机工程学报,2013,33(8):90-94.Hao Hongmeng,Yang Haiping,Liu Rujie,et al.Influence of torrefaction on typical agricultural straw hydrophilic property[J].Proceedings of the CSEE,2013,33(8):90-94(in Chinese).
[25]  Wang D M,Zhong X X,G J J,et al.Changes in active functional groups during low-temperature oxidation of coal[J].Mining Science and Technology,2010,20(1):35-40.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133