Effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion

Shaolong Gao; Baofeng Wang; Fengling Yang; Kai Zhang; Fangqin Cheng

doi:10.1002/apj.2713

Effect of O₂ concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion

Shaolong Gao, Baofeng Wang, Fengling Yang, Kai Zhang, Fangqin Cheng

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In this work, the effect of O₂ concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion were studied by non-isothermal thermogravimetric analysis technology. The results showed that the increase of O₂ concentration could improve the combustion performance of coal gangue. The O₂/CO₂ atmosphere was unfavorable to the combustion of coal gangue compared with the O₂/N₂ atmosphere. Furthermore, the gasification reaction could accelerate overall carbon consumption in oxy-steam combustion with 5% O₂ concentration; and the presence of H₂O could delay the ignition and accelerate burnout at this condition. Kinetic analysis showed that the combustion of coal gangue in O₂/N₂ and O₂/CO₂ atmosphere followed the first-order kinetics under O₂ concentrations studied; and the combustion in O₂/H₂O atmosphere followed the 0.5-order kinetics at 5% and 10% O₂ concentration, while it followed the first-order kinetics at 21% O₂ concentration.

Original language	English
Article number	e2713
Journal	Asia-Pacific Journal of Chemical Engineering
Volume	16
Issue number	6
Early online date	17 Oct 2021
DOIs	https://doi.org/10.1002/apj.2713
Publication status	Published - 1 Nov 2021

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title = "Effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion",

abstract = "In this work, the effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion were studied by non-isothermal thermogravimetric analysis technology. The results showed that the increase of O2 concentration could improve the combustion performance of coal gangue. The O2/CO2 atmosphere was unfavorable to the combustion of coal gangue compared with the O2/N2 atmosphere. Furthermore, the gasification reaction could accelerate overall carbon consumption in oxy-steam combustion with 5% O2 concentration; and the presence of H2O could delay the ignition and accelerate burnout at this condition. Kinetic analysis showed that the combustion of coal gangue in O2/N2 and O2/CO2 atmosphere followed the first-order kinetics under O2 concentrations studied; and the combustion in O2/H2O atmosphere followed the 0.5-order kinetics at 5% and 10% O2 concentration, while it followed the first-order kinetics at 21% O2 concentration.",

keywords = "coal gangue, combustion characteristics, kinetics, oxy-fuel combustion, oxy-steam combustion",

author = "Shaolong Gao and Baofeng Wang and Fengling Yang and Kai Zhang and Fangqin Cheng",

year = "2021",

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doi = "10.1002/apj.2713",

language = "English",

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journal = "Asia-Pacific Journal of Chemical Engineering",

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TY - JOUR

T1 - Effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion

AU - Gao, Shaolong

AU - Wang, Baofeng

AU - Yang, Fengling

AU - Zhang, Kai

AU - Cheng, Fangqin

PY - 2021/11/1

Y1 - 2021/11/1

N2 - In this work, the effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion were studied by non-isothermal thermogravimetric analysis technology. The results showed that the increase of O2 concentration could improve the combustion performance of coal gangue. The O2/CO2 atmosphere was unfavorable to the combustion of coal gangue compared with the O2/N2 atmosphere. Furthermore, the gasification reaction could accelerate overall carbon consumption in oxy-steam combustion with 5% O2 concentration; and the presence of H2O could delay the ignition and accelerate burnout at this condition. Kinetic analysis showed that the combustion of coal gangue in O2/N2 and O2/CO2 atmosphere followed the first-order kinetics under O2 concentrations studied; and the combustion in O2/H2O atmosphere followed the 0.5-order kinetics at 5% and 10% O2 concentration, while it followed the first-order kinetics at 21% O2 concentration.

AB - In this work, the effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion were studied by non-isothermal thermogravimetric analysis technology. The results showed that the increase of O2 concentration could improve the combustion performance of coal gangue. The O2/CO2 atmosphere was unfavorable to the combustion of coal gangue compared with the O2/N2 atmosphere. Furthermore, the gasification reaction could accelerate overall carbon consumption in oxy-steam combustion with 5% O2 concentration; and the presence of H2O could delay the ignition and accelerate burnout at this condition. Kinetic analysis showed that the combustion of coal gangue in O2/N2 and O2/CO2 atmosphere followed the first-order kinetics under O2 concentrations studied; and the combustion in O2/H2O atmosphere followed the 0.5-order kinetics at 5% and 10% O2 concentration, while it followed the first-order kinetics at 21% O2 concentration.

KW - coal gangue

KW - combustion characteristics

KW - kinetics

KW - oxy-fuel combustion

KW - oxy-steam combustion

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U2 - 10.1002/apj.2713

DO - 10.1002/apj.2713

M3 - Article

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SN - 1932-2135

VL - 16

JO - Asia-Pacific Journal of Chemical Engineering

JF - Asia-Pacific Journal of Chemical Engineering

IS - 6

M1 - e2713

ER -

Effect of O₂ concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion

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