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http://dx.doi.org/10.7464/ksct.2013.19.3.306

Comparative Modeling of Low Temperature Char-CO2 Gasification Reaction of Drayton Coal by Carbon Dioxide Concentration  

Park, Ji Yun (Graduate School of Green Energy Technology, Chungnam National University)
Lee, Do Kyun (Graduate School of Green Energy Technology, Chungnam National University)
Hwang, Soon Cheol (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Kim, Sang Kyum (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Lee, Sang Heon (Graduate School of Green Energy Technology, Chungnam National University)
Yoon, Soo Kyung (Department of College of Engineering, Hanyang University)
Yoo, Ji Ho (Clean Coal Center, Korea Institute of Energy Research)
Lee, Si Hyun (Clean Coal Center, Korea Institute of Energy Research)
Rhee, Young Woo (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Publication Information
Clean Technology / v.19, no.3, 2013 , pp. 306-312 More about this Journal
Abstract
We investigated the effects of the concentration of carbon dioxide on the char-$CO_2$ gasification reaction under isothermal conditions of $850^{\circ}C$ using the Drayton coal. Potassium carbonate was used to improve the low-temperature gasification reactivity. The enhancement of carbon dioxide concentration increased the gasification rate of char, while gasification rate reached a saturated value at the concentration of 70%. The best $CO_2$ concentration for gasification is determined to be 70%. We compared the shrinking core model (SCM), volumetric reaction model (VRM) and modified volumetric reaction model (MVRM) of the gas-solid reaction models. The correlation coefficient values, by linear regression, of SCM are higher than that of VRM at low concentration. While the correlation coefficients values of VRM are higher than that of SCM at high concentration. The correlation coefficient values of MVRM are the highest than other models at all concentration.
Keywords
Low-temperature gasification; $CO_2$ gasification; Char gasification; Gasification model;
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