Experimental study on pore structure changing of gasified coal char under combustion

Rui Sun, Xin Zhang, Leungo Kelebopile, Jian Liao, Shaohua Wu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The combustion characters and pore structure changing of the gasified coal char obtained from the secondary cyclone of the Jincheng industrial gasifier were experimental studied at high temperature in a simulator of high-temperature entrained flow reactor. Gasified Chars were burned at the temperature of 1273 and 1573K, the oxygen contain of 5% and 20% and sampled along the reactor at different axial residence time. Automatic adsorption instrument (ASAP 2020) was employed to measure absorption isotherms of sampled chars. Cryogenic nitrogen absorption isotherms, parameters such as BET specific surface area, BJH pore volume and average pore diameter were measured and analyzed. Surface morphology of the char was further studied by scanning electron microscopy (SEM) and with fractal theory. The isotherms of char samples at different residence time were all type II. Higher temperature and more oxygen concentration both can improve the changing of char pore structure. The changing of specific surface areas during the combustion is consistent with the trends of reacting rates for chars. The char reacting rates in finial reacting period is mainly dominated by char intrinsic reactivity.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Volume32
Issue number11
Publication statusPublished - Apr 15 2012

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Pore structure
Coal
Isotherms
Specific surface area
Temperature
Oxygen
Fractals
Cryogenics
Surface morphology
Simulators
Nitrogen
Adsorption
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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Experimental study on pore structure changing of gasified coal char under combustion. / Sun, Rui; Zhang, Xin; Kelebopile, Leungo; Liao, Jian; Wu, Shaohua.

In: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, Vol. 32, No. 11, 15.04.2012, p. 35-40.

Research output: Contribution to journalArticle

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