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	Experimental study and apparent reaction kinetics analysis on the char-steam gasification
	Wang Ming-min ; Zhang Jian-sheng ; Yue Guang-xi ; Lu Jun-fu ; Suda, T. ; Takafuji, M.
	2010-05-11 ; 2010-05-11
关键词	Practical/ charcoal coal gasification thermal analysis/ apparent reaction kinetics analysis char-steam gasification lignite coal char Thermax500 pressurized thermogravimetric analyzer Langmuir-Hinshelwood expression steam molar fractions isotherm method apparent activation energy/ A8630Q Chemical energy conversion B8210 Energy resources
中文摘要	The gasification reaction of lignite coal char and steam was studied with a Thermax500 pressurized thermogravimetric analyzer (PTGA). An nth order expression and Langmuir-Hinshelwood (L-H) expression were applied to describe the effect of pressure and temperature on the reaction. The system pressures were 0.1 and 0.6 MPa, and the steam molar fractions were 5%, 10% and 20% at 0.1 MPa, while was 20% at 0.6 MPa. The isotherm experimental method was applied and the reaction temperatures were 850, 875, 900, 925, 950 and 1 000 degrees C. The results show that when the temperature is lower than 900 degrees C , the reaction rates increase with temperature and pressure, which is kinetic controlled. The apparent activation energies are in the reaction controlled regime and become small when temperature is higher than 900 degrees C. In the nth order expression, the order n is 0.34 and the activation energy is 153.7 kJmo/sup -1/. In the L-H expression, the activation energy is 207.1 kJ-mo/sup -1/. It is found that L-H expression is more accurate than the nth order expression in describing the effect of steam.
语种	中文 ; 中文
出版者	Chinese Society for Electrical Engineering ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/25670]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Ming-min,Zhang Jian-sheng,Yue Guang-xi,et al. Experimental study and apparent reaction kinetics analysis on the char-steam gasification[J],2010, 2010.
APA	Wang Ming-min,Zhang Jian-sheng,Yue Guang-xi,Lu Jun-fu,Suda, T.,&Takafuji, M..(2010).Experimental study and apparent reaction kinetics analysis on the char-steam gasification..
MLA	Wang Ming-min,et al."Experimental study and apparent reaction kinetics analysis on the char-steam gasification".(2010).

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