| 光谱学与光谱分析 |
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| Online Diagnosis of the Conversion of Methane to C2 Hydrocarbons under Glow Discharge Plasma at Atmospheric Pressure |
| WANG Da-wang1,2, XU Yong1, ZHANG Jia-liang2, MA Teng-cai2 |
1. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
2. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China |
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Abstract Optical emission spectroscopy (OES) was adopted for the first time by our group for in situ diagnosis of the conversion of CH4-H2 under glow discharge plasma at atmospheric pressure with rotary electrodes. The emission of excited species such as excited radicals and atoms (C, CH, C2, H and H2) was detected in the spectra range of 300-700 nm. The spectrum of hydrogen atom was used to figure out the plasma excitation temperature by a Boltzmann plot scheme. It was evaluated that the excitation temperature of hydrogen plasmas under varied discharge conditions is in the range of 6 300-6 600 K. The electron density was calculated based on spectral profile of H lines and its order is about 1020 m-3.
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Received: 2009-11-02
Accepted: 2010-02-08
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Corresponding Authors:
WANG Da-wang
E-mail: wangdawang78@163.com
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