褐煤低温氧化及热分解过程中自由基演化规律对比研究  

Study on the Difference of Free Radicals Evolution During the Low-temperature Oxidation and Decomposition Process of Lignite

作　　者：黄珏洁 陆伟[1] 李金虎 Huang Juejie;Lu Wei;Li Jinhu(Anhui University of Science and Engineering,Anhui,232001)

机构地区：[1]安徽理工大学,安徽232001

出　　处：《当代化工研究》2025年第6期32-34,共3页Modern Chemical Research

摘　　要：为研究煤中自由基在低温氧化及热分解过程中的差异,以宝日希勒煤矿褐煤为研究对象,从宏观及微观角度,通过程序升温实验及原位电子顺磁波谱实验,研究低温热分解及低温氧化过程中产气及自由基演变规律,对比分析升温过程中自由基的变化。研究发现,低温热分解过程中煤样会产生以碳中心自由基为主的活性自由基。低温氧化过程同时存在弱键官能团的受热分解及氧气与活性自由基的链式反应,其中活性自由基与氧气发生自由基支链反应占主导,该过程导致煤中自由基大幅度增加,活性自由基是影响煤样氧化进程的重要因素之一。To investigate the difference of free radicals during the low-temperature oxidation and decomposition process,lignite from Baorixile Coal Mine was taken as the research object.From macroscopic and microscopic perspectives,temperature program experiment and in situ electron paramagnetic spectrum experiment were conducted,and the law of gas generation and free radical evolution during low temperature ther-mal decomposition and low temperature oxidation was studied,and the changes of free radicals during temperature rise were compared and ana-lyzed.It is found that active free radicals,mainly carbon center free radicals,are produced in coal samples during low temperature thermal decom-position.Low temperature oxidation process involves thermal decomposition of functional groups and chain reaction between oxygen and active free radicals.Branched chain reaction between active free radicals and oxygen was dominant,which leads to a large increase of free radicals in coal.Ac-tive free radicals were one of the important factors affecting the coal sample oxidation process.

关 键 词：褐煤 煤自燃 自由基 低温氧化 低温热分解 

分 类 号：TD712[矿业工程—矿井通风与安全]