Deoxygenation effect on hydrophilicity changes of Shengli lignite during pressurized pyrolysis at low temperature

HUANG Xin; ZHANG Shu; LIN Xiong-chao; WANG Yong-gang; XU Min

Volume 41 Issue 12

Dec. 2013

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HUANG Xin, ZHANG Shu, LIN Xiong-chao, WANG Yong-gang, XU Min. Deoxygenation effect on hydrophilicity changes of Shengli lignite during pressurized pyrolysis at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1409-1414.

Citation:

HUANG Xin, ZHANG Shu, LIN Xiong-chao, WANG Yong-gang, XU Min. Deoxygenation effect on hydrophilicity changes of Shengli lignite during pressurized pyrolysis at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1409-1414.

Citation:

HUANG Xin, ZHANG Shu, LIN Xiong-chao, WANG Yong-gang, XU Min. Deoxygenation effect on hydrophilicity changes of Shengli lignite during pressurized pyrolysis at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1409-1414.

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Deoxygenation effect on hydrophilicity changes of Shengli lignite during pressurized pyrolysis at low temperature

School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China

Received Date: 2013-05-14
Rev Recd Date: 2013-09-12
Publish Date: 2013-12-30

Abstract

Abstract

The effect of temperature (200~350 ℃) and pressure (0.25~8.00 MPa) on the elimination of main oxygen-containing functional groups of Shengli lignite was examined during pyrolysis in a fixed-bed reactor. Effects of the reduction of oxygen-containing functional groups on the moisture holding capacity (MHC) of coal samples were also investigated. The results showed that temperature was the key factor on the removal of carboxyl and phenolic hydroxyl from the lignite. The variation of pressure had few effects on the removal of carboxyl in coal; in contrast, phenolic hydroxyl was reduced to a minimum point at the pressure between 3.00 to 4.00 MPa. The carboxyl content in the lignite played a dominant role on the surface polarity and moisture holding capacity. The influence of specific surface area on the MHC became distinct when the carboxyl content in coal samples kept constant.
- fixed-bed reactor,
- pyrolysis,
- oxygen-containing functional groups,
- moisture holding capacity

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References(20)

References

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