旋转滑动弧耦合催化剂促进甲烷干重整制取合成气的实验研究

发布时间：2018-04-06 07:14

本文选题：旋转滑动弧　切入点：等离子体　出处：《浙江大学》2015年硕士论文

【摘要】：经济发展依赖能源消耗,化石能源储备日趋不足,能源供给问题日渐严峻。甲烷干重整技术利用CH4和C02两种温室气体,制成H2和CO合成气,既能减少化石能源的利用,又能减轻温室气体所带来的环境问题的压力,因此近年来得到广泛关注。文中主要介绍了磁驱动旋转滑动弧等离子体放电促进甲烷干重整技术,利用高速摄影和示波器,研究了磁场和气流协同驱动的滑动弧的物理特性。研究结果表明：添加磁场会使得滑动弧转速提升；总进气流量6L/min,甲烷浓度为30%时干重整反应剧烈,电弧弧长周期性变化,电弧与电极有多触点现象,且会发生触点漂移。实验还考察了常温常压下利用旋转滑动弧等离子体促进CH4-CO2重整制取合成气效果,实验发现,CH4浓度增加,会使CH4转化率升高,C02转化率先增后减。流量增加,会使CH4、CO2转化率整体呈下降趋势。自制6%Ni/γ-Al2O3、8%Ni/γ-Al2O3、10%Ni/γ-Al2O3三种不同Ni负载量催化剂,对旋转滑动弧耦合催化剂促进甲烷干重整做了实验研究。实验发现Ni/γ-Al2O3催化剂对CH4分解有一定的促进作用,对C02分解促进作用不明显。
[Abstract]:Economic development depends on energy consumption, fossil energy reserves are becoming insufficient, and energy supply is becoming more and more serious.Methane dry reforming technology uses CH4 and CO2 to produce H _ 2 and CO syngas, which can reduce the use of fossil energy and reduce the pressure of environmental problems caused by greenhouse gases, so it has been paid more and more attention in recent years.In this paper, the technique of magnetically driven rotating sliding arc plasma discharge to promote methane dry reforming is introduced. The physical characteristics of the sliding arc driven by magnetic field and airflow are studied by using high-speed photography and oscilloscope.The results show that the rotating speed of sliding arc is increased by adding magnetic field, the total inlet flow rate is 6 L / min, the methane concentration is 30%, the reformer reaction is violent, the arc arc length changes periodically, the arc and electrode have multiple contact points, and the contact drift will occur.The effect of CH4-CO2 reforming with rotating sliding arc plasma at room temperature and atmospheric pressure was also investigated. It was found that the increase of Ch _ 4 concentration would increase the conversion of CH4 and then decrease the conversion of C02.With the increase of flow rate, the conversion rate of Ch _ 4 and CO _ 2 will decrease as a whole.Self-made 6%Ni/ 纬 -Al _ 2O _ 3 / Ni / 纬 -Al _ 2O _ 310Ni / 纬 -Al _ 2O _ 3 catalysts with different Ni loading amounts have been experimentally studied for promoting dry reforming of methane with rotating sliding arc coupling catalysts.It was found that Ni/ 纬 -Al 2O 3 catalyst promoted the decomposition of CH4 to some extent, but not to the decomposition of CO2.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE665.3

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