BU Y C, XU Y L, CHEN M L, et al.Study of oxygen volume fraction influence on the low-temperature oxidation characteristics of bituminous coal with different particle sizes[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(5):38-45.

doi:10.16186/j.cnki.1673-9787.2020080069

Received:2020/08/26

Revised:2021/03/02

Published:2022/09/25

Study of oxygen volume fraction influence on the low-temperature oxidation 

characteristics of bituminous coal with different particle sizes

BU Yunchuan, XU Yongliang, CHEN Menglei, WANG Lanyun

College of Safety Science and Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:To study the effect of oxygen volume fraction on low-temperature oxidation and combustion characteristics of bituminous coal samples with different particle sizes，the programmed heating experiments of coal samples with four particle sizes as 0.2~0.3 mm，＞0.3~0.45 mm，＞0.45~0.60 mm and ＞0.6~0.90 mm were carried out under the oxygen volume fraction of 21%，18%，14% and 5% by using the coal oxidation kinetics test system.The change rules of CO and C₂H₄（index gas）production，heat production rate and kinetic parameters of coal samples were analyzed and demonstrated by the micro-evolution mechanism of coal-oxygen reaction.The results showed that when the oxygen volume fraction was 14%，the temperature difference at the intersection of coal samples with different particle sizes was small，the gap of index gas release was large，and the slope of the fitting curve of the maximum heating rate decreased rapidly （by nearly 50%）.The higher the oxygen concentration，the greater the maximum heat generation rate，the higher the total heat output was and the lower the initial heat release temperature was controlling the oxygen volume fraction below 14% could effectively prevent.

Key words:oxygen volume fraction;particle size;low-temperature oxidation;bituminous coal;combustion characteristic

 氧气体积分数对不同粒径烟煤低温氧化燃烧特性的影响研究_步允川.pdf