High-frequency measurement of concentration in an isothermal methane-air gas mixture using spontaneous Raman spectroscopy.
High-frequency measurement of concentration in an isothermal methane-air gas mixture using spontaneous Raman spectroscopy.
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DOI：
10.1038/s41598-023-37649-1
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发表时间：
2023-08-01
影响因子：
4.6
通讯作者：
Hochgreb, Simone
中科院分区：
文献类型：
--
作者：
Rodrigues, Jocelino;Weller, Lee;De Domenico, Francesca;Hochgreb, Simone
建立了一种高频（1.5 kHz）自发拉曼光谱测量技术，并将其应用于测量等温甲烷和空气二元气体混合物局部浓度产生的外部波动。拉曼激发由527 nm的高频激光在双脉冲模式下提供。斯托克斯拉曼信号采集使用EMCCD相机耦合到一个高频增强器作为快门。发射信号在596-627 nm波长范围内收集，这允许同时跟踪甲烷和氮的斯托克斯q分支模式信号。校准曲线最初是根据稳态浓度获得的，并在使用过程中进一步校正，以检测高达250 Hz的气体脉动频率下的局部非定常混合物波动。主要的新颖之处在于，利用高重复率、低脉冲能量的激光束，结合高频增强器和单个摄像机，展示了拉曼光谱同时测量气相甲烷和空气混合物的非定常浓度。
A high-frequency (1.5 kHz) spontaneous Raman spectroscopy measurement technique is developed and applied to measure external fluctuations generated in the local concentration of an isothermal binary gas mixture of methane and air. Raman excitation is provided by a high-frequency laser at 527 nm in dual-pulsed mode. The Stokes Raman signal is collected using an EMCCD camera coupled to a high-frequency intensifier as a shutter. The emitted signal is collected over the 596–627 nm wavelength range, which allows for the simultaneous tracking of methane and nitrogen Stokes Q-branch mode signals. Calibration curves are initially obtained for each species ( and ) based on steady-state concentrations, and further corrected during use to detect local unsteady mixture fluctuations at gas pulsation frequencies up to 250 Hz. The main novelty is the demonstration of Raman spectroscopy for the simultaneous multispecies measurement of unsteady concentrations of gas-phase methane and air mixtures using a laser beam with a high-repetition rate, low energy per pulse, combined with a high-frequency intensifier and a single camera.
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影响因子：
1.9
作者：
DAVIDSON, DF;CHANG, AY;HANSON, RK
通讯作者：
HANSON, RK
影响因子：
1.9
作者：
DIROSA, MD;CHANG, AY;HANSON, RK
通讯作者：
HANSON, RK
影响因子：
2.1
作者：
Gabet, K. N.;Jiang, N.;Sutton, J. A.
通讯作者：
Sutton, J. A.
影响因子：
4.4
作者：
Bluemner, Richard;Paschereit, Christian O.;Oberleithner, Kilian
通讯作者：
Oberleithner, Kilian
影响因子：
3.8
作者：
De Domenico, Francesca;Guiberti, Thibault F.;Magnotti, Gaetano
通讯作者：
Magnotti, Gaetano