Separation and characterization of C5-asphaltene from low temperature coal tar

ZHANG Qian-yu; XU Zhi-ming; ZHAO Suo-qi

Volume 44 Issue 11

Nov. 2016

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ZHANG Qian-yu, XU Zhi-ming, ZHAO Suo-qi. Separation and characterization of C5-asphaltene from low temperature coal tar[J]. Journal of Fuel Chemistry and Technology, 2016, 44(11): 1318-1325.

Citation:

ZHANG Qian-yu, XU Zhi-ming, ZHAO Suo-qi. Separation and characterization of C5-asphaltene from low temperature coal tar[J]. Journal of Fuel Chemistry and Technology, 2016, 44(11): 1318-1325.

ZHANG Qian-yu, XU Zhi-ming, ZHAO Suo-qi. Separation and characterization of C5-asphaltene from low temperature coal tar[J]. Journal of Fuel Chemistry and Technology, 2016, 44(11): 1318-1325.

Citation:

ZHANG Qian-yu, XU Zhi-ming, ZHAO Suo-qi. Separation and characterization of C5-asphaltene from low temperature coal tar[J]. Journal of Fuel Chemistry and Technology, 2016, 44(11): 1318-1325.

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Separation and characterization of C5-asphaltene from low temperature coal tar

State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China

Funds: The project was supported by the National Basic Research Program of China (863 program, 2011AA05A2024)

Received Date: 2016-07-08
Rev Recd Date: 2016-09-01

Available Online: 2021-01-23

Publish Date: 2016-11-10

Abstract

Abstract

The asphaltene was obtained from the low temperature coal tar heavy fraction by solvent precipitation with three kinds of solvents; n-pentane, n-pentane with 5% ethanol and n-pentane with 5% isopropanol. The properties such as structure parameters and hetero atom distribution were analyzed by ¹H-NMR, ¹³C-NMR, FT-ICR MS, elemental analysis and average molecular weight determination (GPC). Some possible average molecular structures containing hetero atoms were constructed and discussed. The results show that after adding polar solvent, the yield of C5-asphaltene is significantly reduced, while the aromaticity and average molecule weight are enhanced. The average molecular structure of the C5-asphaltene exhibits shorter side-chains and higher condensation degree. Though the type of heteroatom compounds in the asphaltene is barely changed by the addition of polar solvents, the relative abundance of O3-O6 class species is increased. Meanwhile, some O1-O2 class species with low condensation degree are transferred into maltene, indicating that the mixed solvent has a larger solubility with these compounds.
- low temperature coal tar,
- C5-asphaltene,
- average molecular structure,
- heteroatom compound

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References(14)

References

[1]	吴乐乐, 邓文安, 李传, 张英红, 王晓杰.煤焦油重组分沥青质性质分析及对加氢裂化生焦影响的推测[J].燃料化学学报, 2014, 42(8):938-944. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18468.shtml WU Le-le, DENG Wen-an, LI Chuan, ZHANG Ying-hong, WANG Xiao-jie. Properties of coal tar heavy fraction and its relevance to coking in hydrocracking[J].J Fuel Chem Technol, 2014, 42(8):938-944. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18468.shtml
[2]	孙昱东, 杨朝合, 韩忠祥.沥青质含量对渣油加氢转化残渣油收率和性质的影响[J].燃料化学学报, 2012, 40(5):545-549. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract17941.shtml SUN Yu-dong, YANG Chao-he, HAN Zhong-xiang. Influence of asphaltene content on yield and properties of hydrotreated residue[J]. J Fuel Chem Technol, 2012, 40(5):545-549. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract17941.shtml
[3]	KERSHAW J R, BLACK K J T. Structure characterization of coal-tar and petroleum pitches[J]. Energy Fuels, 1993, 7(3):420-425. doi: 10.1021/ef00039a014
[4]	裴贤丰.低温煤焦油沥青质和胶质的分离与表征[J].洁净煤技术, 2011, 17(4):43-45. http://www.cnki.com.cn/Article/CJFDTOTAL-JJMS201104016.htm PEI Xian-feng. Separation and characterization of low temperature coal tar asphaltene and resin[J]. Clean Coal Technol, 2011, 17(4):43-45. http://www.cnki.com.cn/Article/CJFDTOTAL-JJMS201104016.htm
[5]	孙智慧, 李稳宏, 马海霞, 李冬, 田盼盼, 牛梦龙.中低温煤焦油重组分分离与表征[J].煤炭学报, 2015, 40(9):2187-2192. http://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201509033.htm SUN Zhi-hui, LI Wen-hong, MA Hai-xia, LI Dong, TIAN Pan-pan, NIU Meng-long. Separation and characterization of middle and low temperature coal tar heavy fraction[J]. J China Coal Soc, 2015, 40(9):2187-2192. http://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201509033.htm
[6]	侯翠利, 秦志宏, 陈德仁, 陈娟, 张丽英, 李保民.童亭煤族组分的溶剂萃取及萃取物分析[J].洁净煤技术, 2010, 16(1):94-98. http://www.cnki.com.cn/Article/CJFDTOTAL-JJMS201001034.htm HOU Cui-li, QIN Zhi-hong, CHEN De-ren, CHEN Juan, ZHANG Li-ying, LI Bao-min. Analysis of extracts from solvent extraction of group components to Tongting coal[J]. Clean Coal Technol, 2010, 16(1):94-98. http://www.cnki.com.cn/Article/CJFDTOTAL-JJMS201001034.htm
[7]	谢克昌.煤的结构与反应性[M].北京:科学出版社, 2002. XIE Ke-chang. Coal Structure and Its Reactivity[M]. Beijing:Science Press, 2002.
[8]	谷小会.神华煤直接液化残渣结构特性的探讨[D].北京:煤炭科学研究总院, 2005. GU Xiao-hui. Study on the structure characteristics from the Shenhua coal direct liquefaction residue[D]. Beijing:China Coal Research Institute, 2005.
[9]	朱永红, 黄江流, 淡勇, 王磊, 李稳宏, 李冬.中低温煤焦油沥青质的分析表征[J].石油学报(石油加工), 2016, 32(2):334-342. http://www.cnki.com.cn/Article/CJFDTOTAL-SXJG201602018.htm ZHU Yong-hong, HUANG Jiang-liu, DAN Yong, WANG Lei, LI Wen-hong, LI Dong. Analysis and characterization of medium low temperature coal tar asphaltene[J]. Acta Pet Sin (Pet Process Sect), 2016, 32(2):334-342. http://www.cnki.com.cn/Article/CJFDTOTAL-SXJG201602018.htm
[10]	RODGERS R P, HENDRICKSON C L, EMMETT M R, MARSHALL A G, GREANEY M, QIAN K. Molecular characterization of petroporphyrins in crude oil by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry[J]. Can J Chem, 2001, 79(5/6):546-551. https://www.researchgate.net/publication/237382193_Molecular_characterization_of_petroporphyrins_in_crude_oil_by_electrospray_ionization_Fourier_transform_ion_cyclotron_resonance_mass_spectrometry
[11]	WU Z, JERNSTROM S, HUGHEY C A, RODGERS R P, MARSHALL A G. Resolution of 10000 compositionally distinct components in polar coal extracts by negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry[J]. Energy Fuels, 2003, 17(4):946-953. doi: 10.1021/ef030026m
[12]	SHI Q, YAN Y, WU X, LI S, CHUNG K, ZHAO S, XU C. Identification of dihydroxy aromatic compounds in a low-temperature pyrolysis coal tar by gas chromatography-mass spectrometry (GC-MS) and fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS)[J]. Energy Fuels, 2010, 24(10):5533-5538. doi: 10.1021/ef1007352
[13]	龙海洋.低温煤焦油的分子组成研究[D].北京:中国石油大学, 2012. LONG Hai-yang. Composition of low temperature coal tar[D]. Beijing:University of Petroleum, 2012.
[14]	吕君, 高丽娟, 朱亚明, 赵雪飞, 王志雨.中低温煤焦油沥青组成及结构的表征[J].材料导报, 2016, 30(4):127-131. http://www.cnki.com.cn/Article/CJFDTOTAL-CLDB201608031.htm LÜ Jun, GAO Li-juan, ZHU Ya-ming, ZHAO Xue-fei, WANG Zhi-yu. Compositions and structure characterizations of medium and low temperature coal tar pitch[J]. Mater Rev, 2016, 30(4):127-131. http://www.cnki.com.cn/Article/CJFDTOTAL-CLDB201608031.htm