Structural analysis of functional group and mechanism investigation of caking property of coking coal

LI Xiang; QIN Zhi-hong; BU Liang-hui; YANG Zhuang; SHEN Chen-yang

Volume 44 Issue 4

Apr. 2016

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Article Navigation > Journal of Fuel Chemistry and Technology > 2016 > 44(4): 385-393

LI Xiang, QIN Zhi-hong, BU Liang-hui, YANG Zhuang, SHEN Chen-yang. Structural analysis of functional group and mechanism investigation of caking property of coking coal[J]. Journal of Fuel Chemistry and Technology, 2016, 44(4): 385-393.

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LI Xiang, QIN Zhi-hong, BU Liang-hui, YANG Zhuang, SHEN Chen-yang. Structural analysis of functional group and mechanism investigation of caking property of coking coal[J]. Journal of Fuel Chemistry and Technology, 2016, 44(4): 385-393.

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Structural analysis of functional group and mechanism investigation of caking property of coking coal

Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

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Corresponding author: Tel: 13852034193, E-mail: qinzh1210@163.com.
Received Date: 2015-11-23
Rev Recd Date: 2016-02-11

Available Online: 2021-01-23

Publish Date: 2016-04-30

Abstract

Abstract

Eleven coking coals were used in this study and FT-IR and the caking index tests were carried out. The peak separation and quantitative calculation of FT-IR spectra were performed by using Peakfit Software and the relationship between caking property and typical functional groups of coal was investigated. The results showed that there was a close relationship between caking property and FT-IR spectra of coal, especially in the regions of 3 000-2 800 cm^-1 and 3 700-3 000 cm^-1. The component with aliphatic structure was a major determinant of coal caking property. Usually the shorter chain length or the higher branching degree of coal aliphatic structure was, the higher caking property will be. The caking property was codetermined by aliphatic structure and hydrogen bond (including-OH or-NH) and there was a synergic relationship between them. When the condensed degree of structural unit was low and the amount of bridge bonds was higher, the plastic mass based on structural unit with moderate molecular weight can be generated regardless of the coal molecule size. The most dominant sort of binding forces in coal was hydrogen bond. An associative structure even supermolecular structure, which was broken and changed into plastic mass during the state of metaplast, was formed when a number of hydrogen bonds were associated together. The existence of plastic mass was beneficial to the transformation of metaplast into semi-coke and further acquisition of well caking property.
- coking coal,
- FT-IR,
- quantitative analysis,
- Peakfit,
- caking property

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References(33)

References

[1]	YU A B, STANDISH N, LU L. Coal agglomeration and its effect on bulk density[J]. Powder Technol, 1995, 82(2): 177-189. doi: 10.1016/0032-5910(94)02912-8
[2]	NOMURA S, THOMAS K M. The effect of swelling pressure during coal carbonization on coke porosity[J]. Fuel, 1996, 75(2): 187-194. doi: 10.1016/0016-2361(95)00238-3
[3]	SEKI H, KUNAGAI J, MATSUDA M, ITO O, LINO M. Fluidity of coal residues after extraction with mixed solvents[J]. Fuel, 1989, 68(8): 978-982. doi: 10.1016/0016-2361(89)90061-6
[4]	KAM A Y, HIXSON A N, PERIMUTTER D D. The oxidation of bituminous coal. 3. Effect on caking properties[J]. Ind Eng Chem Process Des Dev, 1976, 15(3): 416-422. doi: 10.1021/i260059a012
[5]	LOISON R, FOCH P, BOYER A. Coke: Quality and Production[M]. London: Butterworth, 1989.
[6]	CHEN P, MA J S. Petrographic characteristics of Chinese coals and their application in coal utilization processes[J]. Fuel, 2002, 81(11): 1389-1395. http://documents.tips/documents/petrographic-characteristics-of-chinese-coals-and-their-application-in-coal.html
[7]	DIEZ M A, ALVAREZ R, BARRIOCANAL C. Coal for metallurgical coke production: Qredictions of coke quality and future requirements for cokemaking[J]. Int J Coal Geol, 2002, 50(1): 389-412. https://www.researchgate.net/publication/248517356_Coal_for_metallurgical_coke_production_Predictions_of_coke_quality_and_future_requirements_for_cokemaking
[8]	秦志宏, 袁新华, 宗志敏, 王永志, 张玉, 魏贤勇. 煤中致粘组分与不粘组分[J]. 煤炭转化, 1998, 21(3): 47-50. http://www.cnki.com.cn/Article/CJFDTOTAL-MTZH803.010.htm QIN Zhi-hong, YUAN Xin-hua, ZONG Zhi-min, WANG Yong-zhi, ZHANG Yu, WEI Xian-yong. Coking and non-coking components in coals[J]. Coal Convers, 1998, 21(3): 47-50. http://www.cnki.com.cn/Article/CJFDTOTAL-MTZH803.010.htm
[9]	秦志宏, 李兴顺, 陈娟, 张丽英, 侯翠利, 巩涛. 煤的黏结性来源及形成机理[J]. 中国矿业大学学报, 2010, 39(1): 64-69. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201001012.htm QIN Zhi-hong, LI Xing-shun, CHEN Juan, ZHANG Li-ying, HOU Cui-li, GONG Tao. Origin and formation mechanism of coal caking property[J]. J China Univ Min Technol, 2010, 39(1): 64-69. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201001012.htm
[10]	FERRARO J R, BASILE L J. Fourier Transform Infrared Spectroscopy: Applications to Chemical Systems(Vol.1)[M]. New York: Academic Press, 1985.
[11]	CHEN P. Significance and application of the caking index of coal-Ten years' review[J]. Fuel Process Technol, 1989, 21(2): 99-115. doi: 10.1016/0378-3820(89)90064-7
[12]	SHUI H F, LI H, CHANG H T, WANG Z H, GAO Z, LEI Z P, REN S B. Modification of sub-bituminous coal by steam treatment: Caking and coking properties[J]. Fuel Process Technol, 2011, 92(12): 2299-2304. doi: 10.1016/j.fuproc.2011.08.001
[13]	QI X Y, WANG D M, XIN H H, QI G S. In situ FT-IR study of real-time changes of active groups during oxygen-free reaction of coal[J]. Energy Fuels, 2013, 27(6): 3130-3136. doi: 10.1021/ef400534f
[14]	QIN Z H, CHEN H, YAN Y J, LI C S, RONG L M, YANG X Q. FT-IR quantitative analysis upon solubility of carbon disulfide/N-methyl-2-pyrrolidinone mixed solvent to coal petrographic constituents[J].Fuel Process Technol, 2015, 133: 14-19. doi: 10.1016/j.fuproc.2015.01.001
[15]	ODEH A O. Oualitative and quantitative ATR-FTIR analysis and its application to coal char of different ranks[J]. J Fuel Chem Technol, 2015, 43(2): 129-137. doi: 10.1016/S1872-5813(15)30001-3
[16]	XIN H H, WANG D M, QI X Y, QIG S, DOU G L. Structural characteristics of coal functional groups using quantum chemistry for quantification of infrared spectra[J]. Fuel Process Technol, 2014, 118: 287-295. doi: 10.1016/j.fuproc.2013.09.011
[17]	RHOADS C A, SENFTLE J T, COLEMAN M M, DAVIS A, PAINTER P C. Further studies of coal oxidation[J]. Fuel, 1983,62(12): 1387-1392. doi: 10.1016/0016-2361(83)90104-7
[18]	COOKE N E, FULLER O M, GAIKWAD R P. FT-IR spectroscopic analysis of coals and coal extracts[J]. Fuel, 1986, 65(9): 1254-1260. doi: 10.1016/0016-2361(86)90238-3
[19]	PAINTER P C, COLEMAN M M, SNYDER R W, MAHAJAN O, KOMATSU M, WALKER P L. Low temperature air oxidation of caking coals: Fourier transform infrared studies[J]. Appl Spectrosc, 1981, 35(1): 106-110. doi: 10.1366/0003702814731842
[20]	RIESSER B, STARSINIC M, SQUIRES E, DAVIS A, PAINTER P C. Determination of aromatic and aliphatic CH groups in coal by FT-IR: 2.Studies of coals and vitrinite concentrates[J]. Fuel, 1984, 63(9): 1253-1261. doi: 10.1016/0016-2361(84)90434-4
[21]	SOBKOWIAK M, REISSER E, GIVEN P, PAINTER P. Determination of aromatic and aliphatic CH groups in coal by FT-IR: 1.Studies of coal extracts[J]. Fuel, 1984, 63(9): 1245-1252. doi: 10.1016/0016-2361(84)90433-2
[22]	KISTER J, GUILIANO M, MILLE G, DOU H. Changes in the chemical structure of low rank coal after low temperature oxidation or demineralization by acid treatment: Analysis by FT-IR and uv fluorescence[J]. Fuel, 1988, 67(8): 1076-1082. doi: 10.1016/0016-2361(88)90373-0
[23]	WANG S Q, CHENG H F, JIANG D, FAN H, SHEN S, BAI H P. Raman spectroscopy of coal component of Late Permian coals from Southern China[J]. Spectrochim Acta, Part A, 2014, 132: 767-770. doi: 10.1016/j.saa.2014.06.003
SOLOMON P R, CARANGELO R M. FT-IR analysis of coal.1.Techniques and determination of hydroxyl concentrations[J]. Fuel, 1982, 61(7): 663-669. doi: 10.1016/0016-2361(82)90014-X
SHUI H F, WANG Z C, WANG G Q. Effect of hydrothermal treatment on the extraction of coal in the CS₂/NMP mixed solvent[J]. Fuel, 2006, 85(12): 1798-1802. https://www.researchgate.net/publication/244067913_Effect_of_hydrothermal_treatment_on_the_extraction_of_coal_in_the_CS_2NMP_mixed_solvent
[26]	张科, 姚素平, 胡文瑄, 房洪峰. 煤红外光谱的精细解析及其煤化作用机制[J]. 煤田地质与勘探, 2009, 37(6): 8-13. http://www.cnki.com.cn/Article/CJFDTOTAL-MDKT200906004.htm ZHANG Ke, YAO Su-ping, HU Wen-xuan, FANG Hong-feng. Analysis on infrared spectra characteristic of coal and discussion of coalification mechanism[J].Coal Geol Explor, 2009, 37(6) : 8-13. http://www.cnki.com.cn/Article/CJFDTOTAL-MDKT200906004.htm
[27]	罗陨飞. 煤的大分子结构研究--煤中惰质组结构及煤中氧的赋存形态. 北京: 煤炭科学研究总院, 2002. http://www.cnki.com.cn/Article/CJFDTOTAL-MTJS200202023.htm LUO Yun-fei. Study of coal macromolecular structure: Structure of inertinite and the characteristics of oxygen functional groups in coal. Beijing: China Coal Research Institute, 2002. http://www.cnki.com.cn/Article/CJFDTOTAL-MTJS200202023.htm
[28]	陈茺, 许学敏, 高晋生, 颜涌捷. 煤中氢键类型的研究[J]. 燃料化学学报, 1998, 26(2): 140-144. http://www.cnki.com.cn/Article/CJFDTOTAL-RLHX802.008.htm CHEN Chong, XU Xue-min, GAO Jin-sheng, YAN Yong-jie. Type of hydrogen bonds in coal[J]. J Fuel Chem Technol, 1998, 26(2): 140-144. http://www.cnki.com.cn/Article/CJFDTOTAL-RLHX802.008.htm
[29]	李文, 李东涛, 陈皓侃, 李保庆. O-烷基化对煤中氢键的调控及对热解特性的影响[J]. 燃料化学学报, 2003, 31(6): 513-518. http://rlhxxb.sxicc.ac.cn/CN/volumn/volumn_1231.shtml# LI Wen, LI Dong-tao, CHEN Hao-kan, LI Bao-qing. Regulation of hydrogen bonds in coal through O-methylation and its effect on pyrolysis property[J]. J Fuel Chem Technol, 2003, 31(6): 513-518. http://rlhxxb.sxicc.ac.cn/CN/volumn/volumn_1231.shtml#
[30]	何晓群, 刘文倾. 应用回归分析[M]. 2版. 北京: 中国人民大学出版社, 2007. HE Xiao-qun, LIU Wen-qing. Application of Regression Analysis [M]. 2nd ed. Beijing: China Renmin University Press, 2007.
[31]	陈德仁, 秦志宏, 陈娟, 华宗琪, 陈冬梅. 煤结构模型研究及展望[J]. 煤化工, 2011, 39(4): 28-31. http://www.cnki.com.cn/Article/CJFDTOTAL-MHGZ201104010.htm CHEN De-ren, QIN Zhi-hong, CHEN Juan, HUA Zong-qi, CHEN Dong-mei. Study on the model of coal structure and its prospects[J]. Coal Chem Ind, 2011, 39(4): 28-31. http://www.cnki.com.cn/Article/CJFDTOTAL-MHGZ201104010.htm
[32]	朱银蕙. 煤化学[M]. 北京: 化学工业出版社, 2005. ZHU Yin-hui. Coal Chemistry[M]. Beijing: Chemical Industry Press, 2005.
[33]	( ZHANG Shuang-quan. Coal Chemistry[M]. 2nd ed. Xuzhou: China University of Mining and Technology Press, 2009.