Analysis of N-containing Hydrocarbon Species Produced by a CH4/N2 Microwave Discharge: Simulation of Titan’s Atmosphere

摘要: We report the production of gaseous hydrocarbons, nitriles, and amines in a continuous-flow microwave (MW) plasma discharge excited 10% CH4+90% N2 mixture at pressure 20 torr. The product analysis was made by Li+ ion attachment mass spectrometry (Li+MS), which is suitable for identifying neutral species plasma, since Li+MS provides only molecular ions without any fragmentation. Since these experiments are, design, potentially relevant to atmospheric chemistry Titan's stratosphere, products were compared those obtained from spacecraft observation laboratory simulations. Our detected more than 70 species, including 24 10 amines, possibly some hydrazines. All found Voyager fly-by Titan our simulation system. There good agreement between MW previous experiments. These results suggest that may be valid processes occur planetary atmospheres.