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http://dx.doi.org/10.7464/ksct.2014.20.1.072

The Effect of Waste Catalysts and Kinetic Study on the CO2-Lignite Gasification Reaction  

Seo, Seok-Jin (Department of Mineral Resources & Energy Engineering, Chonbuk National University)
Lee, So-Jung (Department of Energy Storage & Conversion Engineering, Chonbuk National University)
Sohn, Jung Min (Department of Mineral Resources & Energy Engineering, Chonbuk National University)
Publication Information
Clean Technology / v.20, no.1, 2014 , pp. 72-79 More about this Journal
Abstract
In this study, we investigated reaction rate constant and activation energy of $CO_2$ lignite gasification by using waste catalysts (I, II, III) and $K_2CO_3$. The gasification experiments were conducted with the lignite which was mixed physically with the catalysts of 1 wt%, 5 wt%, 10 wt% by thermogravimetry with TGA at $800^{\circ}C$, $850^{\circ}C$ and $900^{\circ}C$. The experimental data was analyzed with kinetic models (VRM, SCM and MVRM). MVRM was the most suitable among the three models. It was confirmed that gasification rate increased with increasing temperature and the activation energies of $CO_2$ gasification of lignite with mixed waste catalysts were lower than that of lignite alone at all temperatures. Especially, 10 wt% of waste catalyst III showed the lowest activation energy, 92.37 kJ/mol, among all lignite-char with catalysts.
Keywords
Lignite; $CO_2$ gasification; Kinetic model; Activation energy;
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Times Cited By KSCI : 2  (Citation Analysis)
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