期刊
PLASMA CHEMISTRY AND PLASMA PROCESSING
卷 37, 期 1, 页码 29-41出版社
SPRINGER
DOI: 10.1007/s11090-016-9759-5
关键词
CO2 containing plasma; CO Angstrom system; Spectrum fitting; Gas temperature determination; Rotational spectroscopy; Dielectric barrier discharges (DBD)
资金
- University of Minnesota
- Tokyo Institute of Technology
- NSF EAPSI
- China Scholarship Council
- Grants-in-Aid for Scientific Research [26289045] Funding Source: KAKEN
CO2 containing plasmas are of growing interest for greenhouse gas remediation and dry gas reforming. In this paper, we show that the optical emission spectrum of CO(B-A) transition can be used for gas temperature determination in CO2 containing plasmas. The study was performed in a packed-bed reactor and compared with previously published results for a MW discharge. The CO emission is mainly produced by direct electron excitation from ground state CO. The rotational temperature is determined by a fitting algorithm of the CO(B-A) (0-1) spectrum and the accuracy of the deduced rotational temperature is shown to be better than 30 K. Meanwhile, we also compared the results with the widely used Boltzmann plots of the CO(B-A) (0-1). The rotational lines corresponding to Q(18-24) yield accurately the gas temperature for spectra with a resolution in excess of 0.05 nm FWHM. Rotational lines with N < 18 cannot be used due to the overlap of rotational lines from different branches unless a spectral resolution of at least 5 pm is used.
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