Evolvement behavior of microstructure and H<sub>2</sub>O adsorption of lignite pyrolysis

Yingyue Teng; Shijun Lian; Quansheng Liu; Yuzhe Liu; Yinmin Song; Runxia He; Keduan Zhi

doi:10.1016/j.cjche.2016.04.012

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Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis

第25届中国过程控制会议专栏 | Updated：2026-01-06

- Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis
- Chinese Journal of Chemical Engineering Issue 6, Pages: 803-810(2016)
- Affiliations：
  
  College of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia Key Laboratory of Industrial Catalysis,Hohhot,China,010051
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.04.012
  CLC：
- Published：2016
- Accepted：
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Yingyue Teng, Shijun Lian, Quansheng Liu, et al. Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis[J]. Chinese Journal of Chemical Engineering, 2016, (6): 803-810. DOI: 10.1016/j.cjche.2016.04.012.
DOI：

Yingyue Teng, Shijun Lian, Quansheng Liu, et al. Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis[J]. Chinese Journal of Chemical Engineering, 2016, (6): 803-810. DOI: 10.1016/j.cjche.2016.04.012. DOI：

摘要

Abstract

The effect of pyrolysis on the microstructure and moisture adsorption of lignite was investigated with low field nuclear magnetic resonance spectroscopy. Changes in oxygen-containing groups were analyzed by Fourier transform infrared spectroscopy (FTIR)

and H

O adsorption mechanism on the surface of lignite pyrolysis was inferred. Two major changes in the pore structure of lignite char were observed as temperature increased in 105-200℃ and 500-700℃. Pyrolysis temperature is a significant factor in removing carboxyl and phenolic hydroxyl from lignite. Variation of ether bond content can be divided into three stages; the content initially increased

then decreased

and finally increased. The equilibrium adsorption ratio

content of oxygen-containing groups

and variation of pore volume below 700° were closely correlated with each other. The amount of adsorbed water on char pyrolyzed at 700℃ increased. Moreover

the adsorption capacity of the lignite decreased

and the adsorption state changed.

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Evolvement behavior of microstructure and H2O adsorption of lignite pyrolysis

DOI：10.1016/j.cjche.2016.04.012

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Abstract

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Evolvement behavior of microstructure and H₂O adsorption of lignite pyrolysis