Determination of Char-CO2 Gasification Rate through Reaction Product

Yong Zhao; Jian Sheng Zhang

doi:10.4028/www.scientific.net/AMR.953-954.1026

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 953-954Determination of Char-CO2 Gasification Rate...

Determination of Char-CO₂ Gasification Rate through Reaction Product

Abstract:

This paper presents gasification kinetic parameters generated for Japanese lignite coal char reacting with carbon dioxide and the method for obtaining them. The experiments were conducted in a PTGA at atmospheric pressure within a temperature range of 1148K-1223K, and a mass spectrometer (MS) is coupled with PTGA to obtain the concentrations of product gas. The experiments were carried out with isothermal method, and kinetic parameters were determined through the analysis of the weight changes of coal char and the concentrations of products respectively. The effect of CO₂ partial pressure on reaction rate was analyzed by n^th order rate equation. It was found that the activation energy of char-CO₂ reaction obtained from weight loss curve and product concentrations were 187.9kJ/mol and 187.0kJ/mol respectively, and the reaction order n were 0.24 and 0.222, proving MS a feasible method for kinetics research. Through the comparison, the method to obtain the kinetic data by concentrations of gas products was determined, and a more clear understanding of the gasification process was established.

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Periodical:

Advanced Materials Research (Volumes 953-954)

Pages:

1026-1030

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.953-954.1026

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Online since:

June 2014

Authors:

Yong Zhao*, Jian Sheng Zhang

Keywords:

Gasification, Kinetic, Mass Spectrometer, Product Concentration

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