Influences of the composition and structure of extractants on their extraction behavior for coal direct liquefaction residue

HUANG Jian-bo; LIU Yang; YAN Lun-jing; LIAO Jun-jie; CHANG Li-ping; WANG Jian-cheng

doi:10.19906/j.cnki.JFCT.2021048

Volume 49 Issue 8

Aug. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(8): 1077-1085

HUANG Jian-bo, LIU Yang, YAN Lun-jing, LIAO Jun-jie, CHANG Li-ping, WANG Jian-cheng. Influences of the composition and structure of extractants on their extraction behavior for coal direct liquefaction residue[J]. Journal of Fuel Chemistry and Technology, 2021, 49(8): 1077-1085. doi: 10.19906/j.cnki.JFCT.2021048

Citation:

HUANG Jian-bo, LIU Yang, YAN Lun-jing, LIAO Jun-jie, CHANG Li-ping, WANG Jian-cheng. Influences of the composition and structure of extractants on their extraction behavior for coal direct liquefaction residue[J]. Journal of Fuel Chemistry and Technology, 2021, 49(8): 1077-1085. doi: 10.19906/j.cnki.JFCT.2021048

Citation:

HUANG Jian-bo, LIU Yang, YAN Lun-jing, LIAO Jun-jie, CHANG Li-ping, WANG Jian-cheng. Influences of the composition and structure of extractants on their extraction behavior for coal direct liquefaction residue[J]. Journal of Fuel Chemistry and Technology, 2021, 49(8): 1077-1085. doi: 10.19906/j.cnki.JFCT.2021048

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Influences of the composition and structure of extractants on their extraction behavior for coal direct liquefaction residue

doi: 10.19906/j.cnki.JFCT.2021048

HUANG Jian-bo^{1, 2
,},
LIU Yang^{1, 2},
YAN Lun-jing^{1, 2},
LIAO Jun-jie^{1, 2},
CHANG Li-ping^{1, 2},
WANG Jian-cheng^{1, 2
,
,}

1.
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
2.
Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China

Funds: The project was supported by National Energy Group 2030 Pilot Project (GJNY2030XDXM-19-17), Natural Science Foundation of Shanxi Province (201901D111119) and Science and Technology Innovation Project of Higher Education in Shanxi Province

Received Date: 2021-01-08
Rev Recd Date: 2021-02-26

Available Online: 2021-03-19

Publish Date: 2021-08-31

Abstract

Abstract

During the direct coal liquefaction process, coal direct liquefaction residue (CDLR), which accounts for about 30% of the coal input, will be produced and the polycyclic aromatic hydrocarbons can be extracted from it by extraction to prepare high-value carbon materials. The influences of composition and structure of extractants on the extraction rate and properties of extracted products were systematically summarized. The extraction rate of the extractants which have aromatic structure or nitrogen and oxygen atom can reach more than 50%. The extracts in alkane organic solvents mainly contain condensed aromatic structure with 2–4 benzene rings and have a lower molecular weight and heteroatom content. The extracts in heteroatoms containing solvents are mainly composed of condensed aromatic structure with 4–7 benzene rings and have a larger molecular weight. And they are rich in heteroatoms, such as nitrogen, oxygen and sulfur, and have a high atomic ratio of C/H. The extracts of pyridinium-based ionic liquids have higher atomic ratio of C/H and aromaticity. And the ash content of the extracts of ionic liquids containing organic acid ions is close to 0. When coal liquefaction oil or coal tar distillate are used as extractants, the extraction rate can reach 60%, which are suggested for industrial applications of CDLR extraction.
- coal direct liquefaction residue,
- extractant,
- extraction behavior,
- blended solvents,
- ionic liquids

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References(54)

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