Hydro-liquefaction of Xiaolongtan lignite and structural characterization of its heavy products

WANG Zhi-cai; SHUI Heng-fu; PAN Chun-xiu; REN Shi-biao; KANG Shi-gang; LEI Zhi-ping

Volume 43 Issue 05

May 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(05): 560-566

WANG Zhi-cai, SHUI Heng-fu, PAN Chun-xiu, REN Shi-biao, KANG Shi-gang, LEI Zhi-ping. Hydro-liquefaction of Xiaolongtan lignite and structural characterization of its heavy products[J]. Journal of Fuel Chemistry and Technology, 2015, 43(05): 560-566.

Citation:

WANG Zhi-cai, SHUI Heng-fu, PAN Chun-xiu, REN Shi-biao, KANG Shi-gang, LEI Zhi-ping. Hydro-liquefaction of Xiaolongtan lignite and structural characterization of its heavy products[J]. Journal of Fuel Chemistry and Technology, 2015, 43(05): 560-566.

Citation:

WANG Zhi-cai, SHUI Heng-fu, PAN Chun-xiu, REN Shi-biao, KANG Shi-gang, LEI Zhi-ping. Hydro-liquefaction of Xiaolongtan lignite and structural characterization of its heavy products[J]. Journal of Fuel Chemistry and Technology, 2015, 43(05): 560-566.

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Hydro-liquefaction of Xiaolongtan lignite and structural characterization of its heavy products

School of Chemistry and Chemical Engineering, Anhui University of Technology, Anhui Key Laboratory of Clean Coal Conversion & Utilization, Ma'anshan 243002, China

Received Date: 2014-10-31
Publish Date: 2015-05-30

Abstract

Abstract

The hydro-liquefaction properties of Xiaolongtan (XLT) lignite were investigated, and structures of the heavy products, including asphaltene (AS) and preasphaltene (PA) were characterized by elemental analysis, FT-IR and fluorescence spectroscopy. The results indicate that XLT lignite shows high liquefaction reactivity, and its conversion catalyzed by FeS at 415 ℃ is 89.6%. During hydro-liquefaction, the macro-molecule of coal are pyrolyzed and deoxygenized. The aromatic structure units in AS and PA are similar to those in the coal. Hydroxyl and carbonyl in the form of aromatic ketone are main oxygen containing groups in AS and PA. The relative content of aromatic structure of PA, dominant in the archipelago molecular architecture, is obviously higher than that of AS. In THF solvent, PA shows significantly stronger aggregation than AS, especially an intra-molecular aggregation observed in a dilute solution. The AS and PA produced at high liquefaction temperature contain more aromatic structure, and show stronger aggregation.
- Xiaolongtan lignite,
- hydro-liquefaction,
- structure characterization,
- heavy product,
- aggregation

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References

沈国娟, 张明旭, 王龙贵. 浅谈褐煤的利用途径[J]. 煤炭加工与综合利用, 2005, (6): 25-27.(SHEN Guo-juan, ZHANG Ming-xu, WANG Long-gui. Utilization way of lignite[J]. Coal Process Compr Util, 2005, (6): 25-27.)

朱晓苏. 中国煤炭直接液化优选煤种的研究[J]. 煤化工, 1997, 25(3): 32-39.(ZHU Xiao-su. Research on Chinese optimum coal types used in direct liquefaction[J]. Coal Chem Ind, 1997, 25(3): 32-39.)

SCHWAGER I, LEE W C, YEN T F. Separation and characterization of synthoil asphaltene by gel permeation chromatography and proton unclear magnetic resonance spectrometry[J]. Anal Chem, 1977, 49(14): 2363-2365.

KANDA N, ITOH H, YOKOYAMA S, OUCHI K. Mechanism of hydrogenation of coal-derived asphaltene[J]. Fuel, 1978, 57(11): 676-680.

OUCHI K, KATOH T, ITOH H. Reaction mechanism for the hydrogenolysis of coal-derived preasphaltene[J]. Fuel, 1981, 60(8): 689-693.

谷小会, 周铭, 史士东. 神华煤直接液化残渣中重质油组分的分子结构[J]. 煤炭学报, 2006, 31(1): 76-80.(GU Xiao-hui, ZHOU Ming, SHI Shi-dong. The molecular structure of heavy oil fraction from the Shenhua coal direct liquefaction reside [J]. J China Coal Soc, 2006, 31(1): 76-80.)

谷小会, 史士东, 周铭. 神华煤直接液化残渣中沥青烯组分的分子结构研究[J]. 煤炭学报, 2006, 31(6): 785-789.(GU Xiao-hui, SHI Shi-dong, ZHOU Ming. Study on the molecular structure of asphaltene fraction from the Shenhua coal direct liquefaction residue[J]. J China Coal Soc, 2006, 31(6): 785-789.)

BOCKRATH B C, DONNE C L D, SCHWEIGHARDT F K. Coal-derived asphaltenes: Characterization by acid-base fractionation[J]. Fuel, 1978, 57(1): 4-8.

STENBERG V I, BALTISBERGER R J, PATAL K M, RAMAN K, WOOLSEY N F. The role of noncovalent bonding in coal[C] // Coal Science (vol.2). New York: Academic Press, 1993:125-171.

YOUNG L S, YAGGI N F, LI N C. Effect of various phenol additives on viscosity of SRC blends[J]. Fuel, 1984, 63(5): 593-598.

WARGADALAM V J, NORINAGA K, IION M. Hydrodynamic properties of coal extracts in pyridine[J]. Energ Fuels, 2001, 15(5): 1123-1128.

HORTAL A R, HURTADO P, MARTINEZ-HAYA B, MULLINS O C. Molecular-weight distributions of coal and petroleum asphaltenes from laser desorption/ionization experiments[J]. Energy Fuels, 2007, 21(5): 2863-2869.

水恒福, 周华. 煤的缔合结构研究. I 溶液缔合动力学[J]. 燃料化学学报, 2004, 32(6): 679-683.(SHUI Heng-fu, ZHOU Hua. Study on the associative structure of coal. I Associative kinetics in solution[J]. J Fuel Chem Technol, 2004, 32(6): 679-683.)

卫一龙, 曹祖宾, 赵德智. 石油胶体分散体系理论及其在工业中的应用[J]. 抚顺石油学院学报, 2000, 20(4): 31-35.(WEI Yi-long, CAO Zu-bin, ZHAO De-zhi. The theory of petroleum disperse system and its application in the industry[J]. J Fushun Petrol Inst, 2000, 20(4): 31-35.)

WANG Z, SHUI H, ZHANG D, GAO J. A comparison of FeS, FeS+S and solid superacid catalytic properties for coal hydro-liquefaction[J]. Fuel, 2007, 86(5/6): 835-842.

王知彩, 崔雪萍, 水恒福, 王祖山, 雷智平, 康士刚. 煤液化沥青烯的荧光光谱表征及缔合结构研究[J]. 光谱学与光谱分析, 2010, 30(6): 1530-1534.(WANG Zhi-cai, CUI Xue-ping, SHUI Heng-fu, WANG Zu-shan, LEI Zhi-ping, KANG Shi-gang. Fluorescence spectroscopy characterization of asphaltene liquefied from coal and study of its association structure[J]. Spectrosc Spect Anal, 2010, 30(6): 1530-1534.)

WANG Z, LI L, SHUI H, WANG Z, CUI X, REN S, LEI Z, KANG S. Study on the aggregation of coal liquefied preasphaltene in organic solvents by UV-vis and fluorescence spectrophotometry[J]. Fuel, 2011, 90(1): 305-311.

WANG Z, WEI C, SHUI H, REN S, PAN C, WANG Z, LI H, LEI Z. Synchronous fluorimetric characterization of heavy intermediates of coal direct liquefaction[J]. Fuel, 2012, 98(8): 67-72.

水恒福, 刘健龙, 王知彩, 张德祥. 小龙潭褐煤不同气氛下液化性能的研究[J]. 燃料化学学报, 2009, 37(3): 257-261.(SHUI Heng-fu, LIU Jian-long, WANG Zhi-cai, ZHANG De-xiang. Preliminary study on liquefaction properties of Xiaolongtan lignite under different atmospheres[J]. J Fuel Chem Technol, 2009, 37(3): 257-261.)

WINNIK F M. Photophysics of preassociated pyrenes in aqueous polymer solutions and in other organized media[J]. Chem Rev, 1993, 93(2): 587-614.

GONCALVESA S, CASTILLOA J, FERNANDEZA A, HUNG J. Absorbance and fluorescence spectroscopy on the aggregation behavior of asphaltene-toluene solutions[J]. Fuel, 2004, 83(13): 1823-1828.

WANG Z, HU J, SHUI H, REN S, WEI C, PAN C, LEI Z, CUI X. Study on the structure and association of asphaltene derived from liquefaction of lignite by fluorescence spectroscopy[J]. Fuel, 2013, 109: 94-100.

SCHEREMATA J M, GRAY M R, DETTMAN H D, MCCAFFREY W C. Quantitative molecular representation and sequential optimization of Athabasca asphaltenes[J]. Energy Fuels, 2004, 18(5): 1377-1384.

KARIMI A, QIAN K, OLMSTEAD W N, FREUND H, YUNG C, GRAY M R. Quantitative evidence for bridged structures in asphaltenes by thin film pyrolysis[J]. Energy Fuels, 2011, 25(8): 3581-3589.

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