| Autor: |
Qiming Wang, Zhenzhen Wang, Takahiro Kamimoto, Yoshihiro Deguchi, Du Wen, Daichi Takahara |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Results in Engineering, Vol 12, Iss , Pp 100297- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2590-1230 |
| DOI: |
10.1016/j.rineng.2021.100297 |
| Popis: |
Tunable diode laser absorption spectroscopy (TDLAS) is a widely used hydrocarbon gas sensing method in many fields. However, the short scanning range limits its application where multi-species detection is necessary. In this paper, a laser system based on TDLAS using a difference frequency generation laser was applied for the investigation of the hydrocarbon gases produced in the coal pyrolysis process and engine exhaust. The coal sample was heated up to 623 K and the recorded spectra were analyzed by the comparison with the pure hydrocarbon spectra database. A least-squares fitting was performed to quantitatively determine the concentration of each component of the mixture. Totally nine different hydrocarbons were identified and the R2 values close to 1 indicate that the variance between measured and fitted data was small. The spectra of engine exhaust were recorded and analyzed using the same method. Hydrocarbon from C3–C8 and a small amount of methane and ethene were identified. The concentration variation with time was observed. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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