Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/8854
Título: Biogas combustion: Chemiluminescence fingerprint
Autor: Quintino, F. M.
Trindade, T. P.
Fernandes, E. C.
Palavras-chave: Biogas
Chemiluminescence
Spectroscopy
Premixed flames
Data: Nov-2018
Editora: Elsevier
Citação: QUINTINO, F. M.; TRINDADE, T. P.; FERNANDES, E. C. – Biogas combustion: Chemiluminescence fingerprint. Fuel. ISSN 0016-2361. Vol. 231, (2018), pp. 328-340
Resumo: A numerical and experimental study was conducted, with the purpose of inferring the influence of the CO2 concentration (xCO2) for different equivalence ratios (ϕ) on CH4/CO2/air (biogas) flames chemiluminescence. A thorough analysis on the signals of OH∗, CH∗, C∗2 and CO∗2 was performed. Typical biogas compositions were tested under laminar atmospheric flame conditions, within the unburned equivalence ratio of 0.9 and 1.14 with CO2 concentrations up to 40% in the blend. Experimental measurements of chemiluminescence were done using spectroscopy in the UV–visible region of the spectra. Simulations were performed with the GRI-Mech 3.0 mechanism without accounting for the nitrogen chemistry, extended with a chemiluminescence kinetics of OH∗, CH∗, C∗2 and CO∗2, in a burner-stabilized frame in CANTERA. Experimental measurements and numerical simulations are compared and generally are in good agreement. It was verified that CO2 dilution leads to a regular decrease in the emission intensities of OH∗, CH∗, C∗2 and CO∗2. Relations between chemiluminescence intensity ratios and xCO2 and ϕ were found. It was shown that OH∗/CO∗2 and C∗2/CO∗2 have the potential predict xCO2 in CH4/CO2/air flames. Moreover, it was verified that OH∗/CH∗, OH∗/C∗2 and CH∗/C∗2 are well suited to infer ϕ for the blends tested. It was verified that xCO2 does not cause relevant changes in the chemiluminescence ratios when inferring ϕ.
Peer review: yes
URI: http://hdl.handle.net/10400.21/8854
DOI: https://doi.org/10.1016/j.fuel.2018.05.086
ISSN: 0016-2361
Versão do Editor: https://reader.elsevier.com/reader/sd/1CD32332609178020D98867D6927FC8A87A2148A0D1E90D1E0566AADE65BAC43D64F67AB885F02C02DE57D6325C26322
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