[Online diagnosis of the conversion of methane to C2 hydrocarbons under glow discharge plasma at atmospheric pressure].
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 6300-6600 K. The electron density was calculated based on spectral profile of H lines and its order is about 10(20) m(-3).
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. wangdawang78@163.com
Da-wang
DW
Wang
Yong
Y
Xu
Jia-liang
JL
Zhang
Teng-cai
TC
Ma