【作者】 王保伟； 许根慧；

【Author】 Key Laboratory for Green Chemical Technology, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072

【机构】 天津大学化工学院绿色合成与转化教育部重点实验室；

【摘要】 石油资源的日趋短缺使人们对天然气的开发和利用越来越重视。氢也是最清洁的燃料,水分子和甲烷分子含有丰富的氢,如果能够合理有效地得到水和甲烷中的氢能,同时得到其他有价值的化学品或燃料,将对清洁能源的生产有重大的理论意义和实用价值。本文利用介质阻挡放电非平衡等离子体反应技术,采用石英管为阻挡介质和不锈钢管内电极以及铜片外电极结构的反应器,在常压、连续流动的反应器中对甲烷与水在中直接合成甲醇进行了研究。利用正交实验的方法对其工艺条件,其中包括原料气总流量、内电极大小、水温、放电电压、稀释率以及外电极长度进行了研究。实验结果表明,适宜的工艺条件为:F =17 2 5 6ml/min、d =12 0mm、T =80℃、U =5 5kV、DR =4、L =6 9 0mm ,此时,甲醇选择性可达6 4 78% ,收率达到16 12 %。更多还原

【Abstract】 With the reduction of petroleum gradually more and more attention has been focused on the development and application of natural gas The research on direct synthesis of methanol from methane and water vapor mixtures has much significant meaning in both academics and application value In this paper, the reaction of direct synthesis of methanol from methane and water vapor mixtures through dielectric-barrier discharge of non-equilibrium plasma reaction was studied The plasma reactor was a concentric cylinder with an inner steel electrode and an outer electrode of copper foil wrapped around a quartz glass tube Technology conditions including flow rate of reactants, diameter of inner electrode, temperature of water, input voltage, dilution ratio and length of outer electrode were investigated through orthogonal experiment in order to explore how methane conversion, methanol selectivity and methanol yield were influenced by these varying factors and find out the optimal technology condition The results showed the selectivity to methanol and the methanol yield is as high as 64 78%,16 12%, respectively, when technology condition was F =17 256 ml/min, d =12 0mm, T =80℃, U =55 kV, DR =4, L =69 0 mm更多还原