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...

印尼褐煤吸湿特性及其热力学参数解析

DOI: 10.13334/j.0258-8013.pcsee.2014.S.019, PP. 136-141

Keywords: 印尼褐煤,水分再吸收,吸湿速率,平衡水分,吸附热

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用水分再吸收实验装置测定了印尼褐煤在30℃和40℃下的等温脱附(吸附)曲线,研究粒径和干燥温度对褐煤吸湿特性的影响;利用多孔介质等温吸附热力学原理,计算得到了印尼褐煤的等温吸附热。结果表明:印尼褐煤等温吸湿曲线的形状是典型的可冷凝蒸汽在孔隙物质中物理吸附的S型;干燥后的印尼褐煤平衡水分(equilibriummoisturecontent,EMC)与粒径无关,而与干燥温度有关,随着干燥温度的提高,平衡水分降低。印尼褐煤的等温吸附热随着平衡水分的增大而降低,当EMC<7%时,干燥煤的吸附热略高于水的蒸发潜热,可以推断水分子在干燥褐煤孔隙表面再吸附机理是水分子物理吸附在褐煤孔隙表面形成体相水和毛细水,没有与煤的表面官能团形成氢键。

References

[1]  Allardice D J,Evans D G.The brown-coal/water system:Part 2.Water sorption isotherms on bed-moist Yallourn brown coal[J].Fuel,1971,50 (3):236-253.
[2]  Mahajan O P,Walker P L.Water adsorption on coals[J].Fuel,1971,50(3):308-317.
[3]  李永昕,薛冰,李再峰.凝结热对低阶煤低温氧化过程的影响[J].燃料化学学报,2006,34(4):408-411. Li Yongxin,Xuebing,Li Zaifeng.Effect of condensation heat on low temperature oxidation of a low rank coal [J].Journal of Fuel Chemistry and Technology,2006,34(4):408-411(in Chinese).
[4]  karsen G,Perlmutter D.Effect of Drying and Oxidation on Coal Pore Structure[J].AIChE Journal,1982,21(2):348-350.
[5]  李文,李保庆.煤的低温氧化与自燃[J] .煤炭转化,1995,18(1) :10-18. Li Wen,Li Baoqing.Low temperature oxidation and spontaneous combustion of coal[J].Coal Conversion,1995,18(1):10-18(in Chinese).
[6]  Ramin A,Leslie I.Drying kinetics of Lignite,Subbituminous coals,and high-volatile Bituminous coals[J].Energy & Fuels,1990,4(5):448-452.
[7]  Vorres K S,Wertz D L,Malhotra V,et al.Drying of Beulah-Zap lignite[J].Fuel,1992,71(9):1047-1053.
[8]  Vorres K S.Effect of temperature,sample size,and gas flow rate on drying on Beulah-Zap lignite and Wyodak subbituminous coal[J].Energy & Fuels,1994,8(2):320-323.
[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):64-70. Shen Wangjun,Liu Jianzhong,Yu Yujie et al.Experimental study on dying and reabsorption of the lignite of Ximeng[J].Proceedings of the CSEE.2013,33(17):64-70(in Chinese).
[10]  林琳.甲烷气氛下褐煤干燥及动力学研究[D].大连:大连理工大学,2013. Lin Lin.Drying and kinetics of lignite under methane atmosphere[D].Dalian:Dalian University of Technology,2013(in Chinese).
[11]  Allardice D J,Evans D G.The brown-coal/water system:Part 1.The effect of temperature on the evolution of water from brown coal[J].Fuel,1971,50(2):201-210.
[12]  Deevi S C,Suuberg E M.Physical changes accompanying drying of western US lignite [J].Fuel,1987,66(4):454-460.
[13]  程红焱,郑光华,秦红等.种子的耐干性及其超干贮藏下的热力学分析[J].中国农业科学,1996,29(6):65-73. Cheng Hongyan,Zheng Guanghua,Qinhong et al.Water thermodynamic analysis on seed desiccation tolerance and its ultradry storage effects[J].Scientia Agriculture Sinica,1996,29(6):65-73(in Chinese).
[14]  文友先,张家年,张声华,等.谷物吸附与解吸过程中的热力学参数[J].粮食与饲料工业,1998(9):16-17. Wen Youxian,Zhang Jianian,Zhang Shenghua et al.The thermodynamics parameters during the sorption and desorption of grain[J].Cereal and Feed Industry,1998(9):16-17(in Chinese).
[15]  Basu S,Shivhare U S,Mujumdar A S.Moisture adsorption isotherms and glass transition temperature of Xanthan gum[J].Drying Technology,2007,25(9):1577-1582.
[16]  伍贤进,吕金海,傅家瑞.超干对种子活力及水分热力学特性的影响[J].生物物理学报,2001,17(3):579-586. Wu Xianjin,Lü Jinhai,Fu Jianrui.Effect of ultradry on seed vigor and seed water thermodynamic character [J].ACTA Biophysica Sinica,2001,17(3):579-586(in Chinese).
[17]  潘永康,王喜忠,刘相东.现代干燥技术[M].2版.北京:化学工业出版社,2007:45-46. Pan Yongkang,Wang Xizhong,Liu Xiangdong.Modern drying technology[M].2nd Edition.Beijing:Chemistry Industry Press,2007:45-46(in Chinese).
[18]  徐艳阳,张敏,孙金才,等.脱水竹笋的等温吸湿特性的研究[J].食品研究与开发,2005,26(5):43-45. Xu Yanyang,Zhang Min,Sun Jincai et al.Study on the water adsorption isotherms of the dehydrated baboon shoot[J].Food Research and Development,2005,26(5):43-45(in Chinese).
[19]  文友先.稻谷吸附等温线模型及计算机模拟[D].武汉:华中农业大学,1999. Wen Youxian.Adsorption isotherm model and computer simulation on grain[D].Wuhan:Huazhong Agricultural University,1999(in Chinese)
[20]  庞贵冬,黄天栋.物理化学[M].北京:北京农业大学出版社,1993:33-35. Pang Guidong,Huang Tiandong.Physical chemistry [M].Beijing:Beijing Agricultural University Press,1993:33-35(in Chinese).
[21]  童钧耕,吴孟余,王平阳.高等工程热力学[M].北京:科学出版社,2006:62-64. Tong Jungeng,Wu Mengyu,Wang Pingyang.Advanced Thermodynamics[M].Beijing:Science Press,2006:62-64(in Chinese).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133