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http://dx.doi.org/10.9713/kcer.2015.53.5.653

Kinetic of Catalytic CO2 Gasification for Cyprus Coal by Gas-Solid Reaction Model  

Hwang, Soon Choel (Graduate school of energy science and technology, Chungnam National University)
Lee, Do Kyun (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Kim, Sang Kyum (Graduate school of energy science and technology, Chungnam National University)
Lee, Si Hyun (Korea Institute of Energy Research)
Rhee, Young Woo (Graduate school of energy science and technology, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.53, no.5, 2015 , pp. 653-662 More about this Journal
Abstract
In general, the coal gasification has to be operated under high temperature ($1300{\sim}1400^{\circ}C$) and pressure (30~40 bar). However, to keep this conditions, it needs unnecessary and excessive energy. In this work, to reduce the temperature of process, alkali catalysts such as $K_2CO_3$ and $Na_2CO_3$ were added into Cyprus coal. We investigated the kinetic of Cyprus char-$CO_2$ gasification. To determine the gasification conditions, the coal (with and without catalysts) gasified with fixed variables (catalyst loading, catalytic effects of $Na_2CO_3$ and $K_2CO_3$, temperatures) by using TGA. When catalysts are added by physical mixing method into Cyprus coal the reaction rate of coal added 7 wt% $Na_2CO_3$ is faster than raw coal for Cyprus char-$CO_2$ gasification. The activation energy of coal added 7 wt% $Na_2CO_3$ was calculated as 63 kJ/mol which was lower than raw char. It indicates that $Na_2CO_3$ can improve the reactivity of char-$CO_2$ gasification.
Keywords
Catalyst; Low-rank Coal; Coal Gasification; Gas-solid Reaction Model; Activation Energy;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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