Plasma assisted conversion of methane and carbon dioxide

甲烷和二氧化碳的等离子体辅助转化

基本信息

批准号：
68830807
负责人：
Professor Dr. Karl-Heinz Gericke
金额：
--
依托单位：
Institut für Physikalische und Theoretische Chemie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2011-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/68830807?language=en
关键词：
Plasma assisted conversion methane carbon

项目摘要

Several technologies including catalysis and plasma have already been proposed to improve the process involving conversion of methane and carbon dioxide into useful chemical intermediates. The conversions in dielectric-barrier discharges (DBD) or in gliding discharges (GD) were influenced significantly by discharge power, applied voltage, and catalysts. The detailed experience of the Warswava group in this field of non-thermal plasma applications including catalysts will be combined with a novel plasma source developed in Braunschweig. That source consists of electrodes (and distances between the electrodes) in the 10μm range allowing the generation and steering of plasmas at different discharge properties compared to DBD and GD. In addition, a sequential arrangement of these plasma sources is possible which allows a significant improvement in both efficiency and selectivity. The operating pressure can be as high as that of ambient air.Preliminary results obtained in Braunschweig show that many of the main products, C2H2, C2H4, C2H6, CH3COOH, CH3OH, HCHO, CO, H2, can be generated with efficiencies much better than10%. Since a catalyst placed in the discharges of the plasma affects the product distributions significantly, an even higher product yield than already observed can be expected. The mechanisms of product formation are still not understood and detailed analytics will be used, including on-line mass spectrometry, GC, laser induced fluorescence, FT-IR, optical emission spectroscopy (OES), and Cavity-Ring-Down (CRD) spectroscopy. The merits and drawbacks of either plasma technique will be assessed. The suitable technique or a combination of both will be identified and optimized. The CO2 reforming of methane using plasma-catalytic coupled process may be a source of desired products including ethylene and methanol, by one-stage operation. The selected process will be simple, exhibits low carbon production, and is not as energy intensive as Fischer-Tropsch. Some products (CH3COOH, CH3OH, HCHO) might even be found as a liquid.

已经提出了几种包括催化和血浆在内的技术，以改善涉及甲烷和二氧化碳转化为有用的化学中间体的过程。顽固的轰炸放电（DBD）或滑行放电（GD）的转化受到放电功率，施加电压和催化剂的显着影响。 Warswava集团在包括催化剂在内的非热等离子体应用领域的详细体验将与Braunschweig开发的新型等离子体来源相结合。该来源由10μm范围内的电极（以及电极之间的距离）组成，与DBD和GD相比，等离子体在不同放电性能下的产生和转向。另外，这些等离子体源的顺序排列是可以显着提高效率和选择性的。在Braunschweig中获得的初步结果表明，许多主要产品C2H2，C2H4，C2H6，C2H6，CH3COOH，CH3OOH，CH3OH，CH3OH，HCHO，CO，H2在Braunschweig中获得的初步结果可以与环境空气一样高。由于放置在血浆排放中的催化剂会显着影响产品分布，因此可以预期的比已经观察到的更高的产品产量。产品形成的机制仍不理解，将使用详细的分析，包括在线质谱法，GC，激光诱导的荧光，FT-IR，光学发射光谱（OES）和腔环（CRD）光谱（CRD）光谱。两种等离子体技术的优点和缺点将被评估。合适的技术或两者的组合将被识别和优化。使用等离子体催化耦合工艺对甲烷进行二氧化碳的重整可能是一阶段运行，包括乙烯和甲醇，包括乙烯和甲醇的来源。选定的过程将很简单，表现出低碳的产生，并且不如Fischer-Tropsch能量密集型。某些产品（CH3COOH，CH3OH，HCHO）甚至可能被发现为液体。