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(5): 560-566. shu

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

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

Corresponding author: WANG Zhi-cai,
Received Date: 31 October 2014

Fund Project: 国家重点基础研究发展规划(973计划, 2011CB201300-G) (973计划, 2011CB201300-G) 国家自然科学基金(51174254, U1261208, U1361125, 21176001, 21306001, 21476004) (51174254, U1261208, U1361125, 21176001, 21306001, 21476004) 中国矿业大学教育部重点实验室开发基金(CPEUKF1404) (CPEUKF1404)

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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沈阳化工大学材料科学与工程学院沈阳 110142