Citation: WANG Fang, ZENG Xi, WANG Yong-gang, YU Jian, XU Guang-wen. Investigation on in/ex-situ coal char gasification kinetics in a micro fluidized bed reactor[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(4): 393-401. shu

Investigation on in/ex-situ coal char gasification kinetics in a micro fluidized bed reactor

WANG Fang ¹ ,
ZENG Xi ^2,, ,
WANG Yong-gang ¹ ,
YU Jian ² ,
XU Guang-wen ^2,,

1.
1. School of Chemical and Environmental Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China;

Corresponding author: ZENG Xi, XU Guang-wen,
Received Date: 20 November 2014

Fund Project: 国家自然科学基金(21306209) (21306209)科技部重大仪器专项(2011YQ120039) (2011YQ120039)中国科学院战略性先导科技专项"低阶煤清洁高效梯级利用关键技术与示范"(XDA07050400)。 (XDA07050400)

In-situ char and ex-situ char gasification characteristic was studied by using a newly developed micro fluidized bed reaction analyzer (MFBRA) and the reaction kinetics parameters were obtained. The in-situ char gasification proceeds using the same atmosphere, temperature and reactor in the gasification following the pyrolysis; the ex-situ char 1 gasification is defined as coal pyrolysis in Ar atmosphere and then gasification at hot state in the same reactor; and ex-situ char 2 gasification reaction is defined as coal pyrolysis in Ar atmosphere and then gasification after thermal annealing. By analyzing the three kinds of char, it can be seen that in-situ char has the largest specific surface area, lowest graphitization degree, and strongest sorption ability for CO₂. Under the minimized limitations of heat and mass transfer, in-situ char gasification has the highest reaction rate, and lowest reaction energy. The study also proves the reliability of MFBRA for in-situ char gasification reaction.
- MFBRA,
- in-situ gasification,
- ex-situ gasification,
- reaction kinetics,
- isothermal reaction
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