大气压低温等离子体射流甲醇直接合成乙二醇新技术实验教学研究  

Experimetal teaching research on novel technology for direct synthesis of ethylene glycol from methanol using atmospheric pressure low temperature

作　　者：钱沐杨[1] 陈小昌[1] 李桂[1] 刘三秋[1] 

机构地区：[1]南昌大学物理系,江西南昌330031

出　　处：《实验技术与管理》2017年第1期44-47,55,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(11465013);江西省科技厅自然科学基金项目(20151BAB212012;2016BAB201013);2016年南昌大学校级教学改革研究课题"<有限元方法与软件应用>创新学分教学实践与探索"

摘　　要：利用激光诱导荧光(LIF)及发射光谱(OES)对大气压CH_3OH/Ar等离子体射流放电进行了详细地诊断研究,主要考察了不同CH_3OH/Ar体积比对射流中OH自由基的密度时空分布的影响。研究结果表明,仅少量的甲醇蒸气掺入到工作气体氩气中时(CH_3OH/Ar体积比为0.05%),有利于OH自由基的产生。发射光谱测量结果中发现存在含碳的特征活性粒子,如CN、CH、C2等。对大气压CH_3OH/Ar等离子体放电中甲醇的分解机制进行了详细的探讨。通过实验数据及进一步的探讨分析,评估了大气压低温等离子体射流中甲醇直接合成乙二醇技术的关键性外界工作参数。By using laser-induced fluorescence（LIF）and optical emission spectroscopy（OES）,a detaileddiagnosticresearch is carried out on atmospheric pressure CH3OH/Ar plasma jet discharge.The influence of different CH3OH/Ar volume ratio on the density temporal and spatial distribution of OH radicals in a jet is mainly investigated.The research results show that it is favorable for the production of OH radicals only when the small amount of methanol vapor blends into argon plasma（CH3OH/Ar volume ratio is 0.05%）.The characteristic active particles with carbon such as CH,CN,C2,etc.,are detected in the emission spectrum measurement results.The detailed exploration is carried out on the methanol dissociation mechanism in atmospheric pressure CH3OH/Ar plasma discharge. Through the experimental data,and further exploration and analysis,the key external operating parameters of direct synthesis technology of ethyleneglycol from methanol by low-temperature plasma jet at atmospheric pressure is evaluated.

关 键 词：大气压低温等离子体射流 有机化合物合成 激光诱导荧光 羟基 

分 类 号：O622.3[理学—有机化学]