1. College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China 2. College of Physical Science and Technology, Dalian University, Dalian 116622, China
Abstract:The optical emission spectrometry (OES) of methane ranging from 200 to 900 nm under plasma with different carbon dioxide contents were recorded and marked. Various reactive species in methane plasma such as: CHn(n=3,2,1),H,C2,C,C+,CO2+,O,CO+,OH and CHO were detected in situ by OES with different CO2 contents at atmospheric pressure. The relative intensity of reactive species was different with different CO2 contents. The relative intensity of O reactive specie was increased rapidly and C2 reactive specie was reduced gradually with increasing CO2 contents. Reactive O from the dissociation of CO2 had an obvious influence on the methane conversion. The mechanism of methane conversion was changed when CO2 contents increased. The coupling of methane to C2 hydrocarbons was the main reaction when CO2 contents were smaller than 30%, while the reforming of methane played a dominant role when CO2 contents higher than 30%.
Key words:Methane;Carbon dioxide;Optical emission spectrometry;Active species
翟林燕1,于 淼1,周 倩1,袁学德2,张秀玲2* . 常压等离子体作用下CO2氧化CH4转化反应的光谱分析 [J]. 光谱学与光谱分析, 2012, 32(03): 734-738.
ZHAI Lin-yan1,YU Miao1,ZHOU Qian1,YUAN Xue-de2,ZHANG Xiu-ling2* . Spectral Analysis of the Reaction of CH4 with CO2 as Oxidant under Plasma at Atmospheric Pressure. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(03): 734-738.
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