Conversion of Methane and Carbon Dioxide in a DBD Reactor: Influence of Oxygen
Conversion of Methane and Carbon Dioxide in a DBD Reactor: Influence of Oxygen
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DOI：
10.1007/s11090-013-9448-6
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发表时间：
2013-04
影响因子：
3.6
通讯作者：
T. Kolb;Jan H. Voigt;K. Gericke
中科院分区：
文献类型：
--
作者：
T. Kolb;Jan H. Voigt;K. Gericke
采用介质阻挡放电（DBD）支撑的连续活塞流反应器，研究了不同组成的甲烷、二氧化碳和氧气的转化。三种研究气体用氦气稀释至3%，总流速为200 sccm。在大气压下点燃13.56 MHz等离子体。通过配备有白池的FTIR光谱仪和四极质谱仪分析产物流和入口流。DBD反应器产生氢气、一氧化碳、乙烷、乙烯、乙炔、甲醛和甲醇。进料中的额外氧气对甲醇、甲醛和一氧化碳的产率具有积极影响，并降低了总消耗的能量。氢产率在入口流中的中等量的氧时达到其最大值。甲烷的转化率增加到约35%的极限值。富甲烷进料增加了氢气、乙烷和甲醇的产率。另一方面，额外的氧对C2烃的产生量具有负面影响。通过将等离子体功率改变为更高的值，甲烷和二氧化碳的转化率以及合成气组分和C2烃的产率增加。
A continuous plug flow reactor supported by a dielectric barrier discharge (DBD) is used to study the conversion of methane, carbon dioxide, and oxygen at different compositions. The three studied gases were diluted with helium to 3 % with an overall flow rate of 200 sccm. The 13.56 MHz plasma was ignited at atmospheric pressure. The product stream and the inlet flow were analyzed by a FTIR spectrometer equipped with a White-cell and by a quadrupole mass spectrometer. The DBD reactor generates hydrogen, carbon monoxide, ethane, ethene, acetylene, formaldehyde, and methanol. Additional oxygen in the feed has positive effects on the yield of methanol, formaldehyde and carbon monoxide and reduces the total consumed energy. The hydrogen yield reaches its maximum at medium amounts of oxygen in the inlet flow. The conversion of methane increases to a limiting value of about 35 %. Methane rich feeds increase the yield of hydrogen, ethane and methanol. On the other hand, additional oxygen has a negative influence on the produced amount of C2 hydrocarbons. The conversion of methane and carbon dioxide as well as the yield of synthesis gas components and C2 hydrocarbons increases by changing the plasma power to higher values.