Kinetic study on the lignite-CO₂ gasification in the presence of K₂CO₃

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Document Type

Conference Proceeding

Publication Date

2011

Physical Description

10 leaves

Abstract

The catalytic CO₂ gasification of Mongolian lignite with K₂CO₃ has been performed in a thermogravimetric analyzer (TGA) and the kinetics of the reaction was studied. The gasification temperature was from 600֯ C that the addition of K₂CO₃ increased the carbon conversion by 45% with respect to the uncatalyzed reaction. The enhancement in gasification rate at this temperature ranged between 10-25 times that of the uncatalyzed reaction. For coal gasification at higher temperatures, the enhancement in gasification rate was between 5-6 times that of the uncatalyzed reaction which implies that any further increase in the catalyst loading will not significantly affect the rate of the gasification reaction. On the other hand, the experimental results showed no significant difference in gasification rate whether catalyst was added by physical mixing or by impregnation. This study further confirms that K₂CO₃ volatilization during gasification with N₂-CO₂ gas mixture. Most of gasification conversion behavior could be well predicted with the extended modified volumetric model

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Disciplines

Chemical Engineering

Note

Paper presented at the International Conference on Coal Science and Technology (ICC&T), Oviedo-Spain, 9-13 October 2011

Keywords

International Conference on Coal Science and Technology (2011 : Oviedo-Spain)

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