胜利褐煤燃烧中未反应残留物结构特性及铁的添加效应  

Structure characteristics of unreacted residues in combustion of Shengli lignite and effect of adding Fe components

作　　者：宋银敏[1] 冯伟[1] 王云飞[1,2] 李娜[1] 班延鹏[1] 滕英跃[1] 智科端[1] 何润霞[1] 周华从[1] 刘全生[1] 

机构地区：[1]内蒙古工业大学化工学院内蒙古自治区低阶碳质资源高值化利用重点实验室,内蒙古呼和浩特010051 [2]鄂尔多斯应用技术学院化学工程系,内蒙古鄂尔多斯017000

出　　处：《燃料化学学报》2016年第12期1447-1456,共10页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21676149;21606134;21566029;21566028;21266017);内蒙古自然科学基金(2014MS0220;2015BS0206;2016BS0204);内蒙古科技引导奖励基金;内蒙古自治区重大基础研究开放课题资助~~

摘　　要：利用TGA确定胜利褐煤盐酸脱灰煤和添加铁组分脱灰煤的着火温度,在着火温度进行燃烧反应,收集燃烧反应一定时间后的未反应残留物,利用FT-IR、XPS、XRD和Raman等对其进行表征,研究了胜利褐煤燃烧过程中铁的影响规律。结果表明,铁的加入降低脱灰胜利褐煤的着火温度,当添加量为3.50%时,着火温度降低的幅度最大。在着火温度燃烧反应一定时间后未反应残留物的FT-IR表明,其有机官能团结构无显著变化,说明铁的添加并不影响其有机官能团结构特性,有机官能团不会对燃烧性能产生太大的影响。添加铁使SL+在燃烧过程中未反应残留物结构芳香度下降,晶面间距增大,晶体结构中缺陷位相对增加,石墨化程度降低,烷基侧链增多,碳氧结构迅速减少,说明铁组分的加入改变了其燃烧过程中碳氧结构转化特性,抑制了石墨化转化速率与程度,即在燃烧反应过程中改变了其未反应残留物的微结构,从而改变了其反应历程,加速燃烧反应速率。The effect of Fe on structure of unreacted residues from combustion of demineralized Shengli lignite at ignition temperature was studied. TGA was adopted to investigate the ignition temperature of demineralized and Fe adding lignite,which were combusted at ignition temperature in quartz tube reactor to attain solid unreacted residues. The structure properties of lignite and the unreacted residues were investigated by F T - I R, XPS, XRD,and Raman spectra to study influence of Fe on the combustion reaction. The results indicate that adding of Fe lowers the ignition temperature of demineralized Shengli lignite, especially w h e n the adding amount was 3.50%. The FT-IR of solid unreacted residues demonstrates that the adding of Fe has no obvious effect on functional groups of unreacted residues, suggesting that the functional groups are not the main factors to affect he combustion performance. The Fe adding accelerates the decrease of carbon-oxygen structure of S L ＋ during combustion and causes the reduced aromaticity and graphitization degree of unreacted residues, and favors the increase in alkyl side chain and crystal structure defects,indicating that the Fe adding promotes the changes in carbon-oxygen structure during combustion and restrains graphitized transformation of unreacted residues.

关 键 词：胜利褐煤 煤燃烧 氯化铁 未反应残留物 结构特性 

分 类 号：TQ534[化学工程—煤化学工程]