A semi-detailed kinetic model of char combustion with consideration of thermal annealing

被引：25

作者：

Senneca, Osvalda ^{[1
]}

Salatino, Piero ^{[1
,2
]}

机构：

[1] CNR, Ist Ric Combust, I-00185 Rome, Italy

[2] Univ Naples Federico II, Dipartimento Ingn Chim, I-80125 Naples, Italy

来源：

PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2011年 / 33卷

关键词：

Char combustion; Thermal annealing; Semi-detailed kinetic model; COAL CONVERSION SUBMODELS; CARBON GASIFICATION; DESIGN APPLICATIONS; ELEVATED PRESSURES; OXIDATION; REACTIVITY; OXYGEN; ORDER; TEMPERATURE; MECHANISM;

D O I：

10.1016/j.proci.2010.08.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present paper presents a semi-detailed kinetic model of coal char combustion which embodies consideration of thermal annealing as a mechanism leading to the loss of char combustion reactivity along burn off. The distinctive feature of this model is that deactivation induced by thermal annealing is followed along with combustion. Thermodeactivation is modelled according to the power-law equation proposed by Senneca and Salatino [1]. A semi-detailed combustion mechanism was taken after Hurt and Calo [2] and includes three steps: formation of carbon-oxygen complexes (chemisorption), switch-over of surface oxides and desorption of oxygen complexes to yield combustion products. Computation results allow to discuss the impact of thermal annealing on char combustion under conditions of practical interest. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：1763 / 1770

页数：8

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