Kinetic Study of CO2 Gasification of Coal Chars

Li Hong Zhao; Xi Jie Chu; Shao Juan Cheng

doi:10.4028/www.scientific.net/AMR.550-553.2754

Paper Titles

A New Type of Reaction of N₂ with Li
p.2733

Mass Transfer Mechanisms of ASP Flooding in Porous Media
p.2738

Kinetic Analysis on SiC Prepared by Carbothermic Method
p.2745

Experimental Study on Thermal Diffusivity of Intumescent Fire-Retardant Materials
p.2749

Kinetic Study of CO₂ Gasification of Coal Chars
p.2754

Research on Pyrolysis Kinetics of Shenhua Coal and Direct Liquefaction Residue
p.2758

The Pressure Drop at Critical Fluidization of Large Particles in Vibrated Fluidization Bed
p.2763

Thermal Degradation Kinetics of a Intumescent Flame Retardant System for Halogen-Free Flame Retarded EVA
p.2767

Kinetics of the Formation of Carbonyl Sulfide in γ-FeOOH Desulfurization at Ambient Temperature
p.2773

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 550-553Kinetic Study of CO2 Gasification of Coal Chars

Kinetic Study of CO₂ Gasification of Coal Chars

Abstract:

The CO2 gasification of three coal chars were investigated for determining the gasification reactivity and the kinetic parameters. Experiments were conducted in a fluidized-bed reactor at temperature of 1173 k, 1273 k and 1373 k at atmospheric pressure. Gasification kinetic parameters of the samples were determined using Homogeneous model and shrinking-core model. It is found that the gasification reaction under chemical-reaction-rate control, the gasification reactivity of coal char are strongly dependent on the rank of coals and gasification temperature. Both models could describe CO2 gasification equally well, these kinetic values are comparable with the reported in the literature for the other chars under chemical control conditions.