Citation: ZHAO Hui-ming, JIA Ting-hao, WANG Mei-jun, BAO Wei-ren, CHANG Li-ping. Upgrading of Zhaotong coal by pyrolysis and its effect on the gasification reactivity[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(8): 904-910. shu

Upgrading of Zhaotong coal by pyrolysis and its effect on the gasification reactivity

Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan 030024, China

Corresponding author: CHANG Li-ping, lpchang@tyut.edu.cn
Received Date: 29 February 2016
Revised Date: 23 April 2016

Figures(9)

In order to integratedly utilize the relatively rich coal resource of Zhaotong mine, temperature-programmed pyrolysis experiments of Zhaotong lignite were performed in fixed bed reactor at different temperatures. The resultant coal tar and char were characterized by GC-MS and Raman Spectroscopy, respectively. Char-H₂O isothermal gasification characteristics were evaluated in fixed bed reactor at 850℃. The results show that in pyrolysis at 700℃ the cumulative content of H₂, CO and CH₄ in gases accounts for about 70%, and the growth rate of low calorific value of gas is the fastest, which is 90% based on the value at 500℃. A large number of phenolic compounds are generated at 500-700℃. Above 700℃ the decomposition reactions of the phenolic compounds is intensified. With the increase of pyrolysis temperatures, the apparent reaction rate of char decreases, while the molar ratio of CO₂ and CO increases. The molar ratio of H₂ and CO in gasification from char pyrolyzed at 700℃ was the highest.
- pyrolysis upgrading,
- release of gas,
- coal tar,
- gasification reactivity
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