小分子有机物的氧化模拟实验  

Coal Oxidation Simulation Experiments for Small Molecular Organics

作　　者：吕超 许国祥 彭英健[1] Lv Chao;Xu Guoxiang;Peng Yingjian(Institute of Coal,Datong University,Datong Shanxi,China;Henan Hongyang Industrial Group Co.,Ltd.,Nanyang Henan,China)

机构地区：[1]山西大同大学煤炭工程学院,山西大同037003 [2]河南北方红阳机电有限公司,河南南阳474678

出　　处：《矿产综合利用》2021年第3期165-169,157,共6页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金青年科学基金资助项目(51604247);大同市工业重点研发计划项目(2019024);山西大同大学博士科研启动项目(2016-B-21)。

摘　　要：为了研究煤中小分子有机物对煤低温氧化的影响,使用四氢呋喃溶剂对袁庄6煤进行微波辅助抽提,得到抽提产物,经GC/MS联用仪分析后得出煤中小分子有机物的主要成分。通过对比分析,选取丙苯醚、二苯基甲烷、2,6-二-叔-丁基-4-(羟甲基)苯酚和9H-芴-9-醇等4种物质作为氧化模拟化合物,进行氧化模拟实验,测得4种模拟化合物不同温度条件下的耗氧速率及CO产生速率。研究结果表明:4种氧化模拟化合物的耗氧速率及CO生成速率的变化趋势与原煤的变化趋势保持着一定的相似,均大于原煤;耗氧速率随温度的升高而增大;CO产生速率在反应初期增长均较慢,在100℃之后增长趋势加快,基本呈指数关系递增。可见,煤中小分子有机物的存在加速了袁庄6煤的氧化进程,促进了煤炭自燃。To study the impact on low-temperature oxidation rule of small molecule organics in the Yuanzhuang 6 coal samples were extracted by tetrahydrofuran using microwave assisted method.Main components of extraction products were analyzed using the GC/MS interface.Four substances were selected as oxidizing analog compounds:propyl ether,diphenylmethane,2,6-di-tert-butyl-4-(hydroxymethyl)phenol and 9H-fluorene-9-alcohol.Their oxygen consumption rate and CO production rate at different temperature conditions were tested through oxidation simulation experiments.The results indicated that the trends of oxygen consumption rate and CO generation rate of 4 oxidation simulation compounds are similar to raw coal.Consumption rate of 4 oxidation simulation compounds is greater than that of raw coal,and increases with increasing temperature.CO production rate increases slowly in the early stages of the reaction,and then accelerat exponentially after 100℃.Small molecule organic in coal accelerated the oxidation process of Yuanzhuang 6 coal and promoted coal spontaneous combustion.

关 键 词：贫锰铁矿抛尾 还原焙烧 磁选 

分 类 号：TD951[矿业工程—选矿]