Mid-infrared dual frequency comb spectroscopy for combustion analysis from 2.8 to 5 μm
Mid-infrared dual frequency comb spectroscopy for combustion analysis from 2.8 to 5 μm
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DOI：
10.1016/j.proci.2020.06.195
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发表时间：
2021-04-10
影响因子：
3.4
通讯作者：
Rieker, Gregory B.
中科院分区：
文献类型：
--
作者：
Makowiecki, Amanda S.;Herman, Daniel, I;Rieker, Gregory B.
我们演示了锁模中红外双频梳状光谱在燃烧分析中的应用。使用相同双梳系统的两种设置，测量范围为1500厘米（-1），从2.8到5 μ m， 0.0067厘米（-1）（200 MHz）点间距，或近25万个离散梳模式。利用该宽带谱仪，我们量化了木材样品的热解和阴燃。具体来说，我们测量了CH4、H2O的20秒时间分辨摩尔分数、CO2的两种同位素(（CO2)-C-12-O-16、(CO2)-C-13-O-16）、CO的两种同位素(（CO)-C-12-O-16、(CO)-C-13-O-16）、乙烷、甲醛、甲醇、甲酸以及辐射加热木材样品正上方的气体温度。双梳光谱仪的精细光谱分辨率和宽带宽的结合允许从拥挤的光谱中精确分离单个分子的吸收特征。(c) 2020燃烧研究所。Elsevier Inc.出版。版权所有。
We demonstrate the application of mode-locked mid-infrared dual frequency comb spectroscopy for combustion analysis. With two settings of the same dual-comb system, the measurement spans 1500 cm(-1) from 2.8 to 5 mu m with 0.0067 cm(-1) (200 MHz) point spacing, or almost a quarter-million discrete comb modes. Using this broadband spectrometer, we quantify the pyrolysis and smoldering combustion of wood samples. Specifically, we measure 20-second time-resolved mole fractions of CH4, H2O, two isotopologues of CO2 ((CO2)-C-12-O-16 , (CO2)-C-13-O-16), two isotopologues of CO ((CO)-C-12-O-16, (CO)-C-13-O-16), ethane, formaldehyde, methanol, formic acid, as well as gas temperature directly above radiatively heated wood samples. The combination of the fine spectral resolution and the broad bandwidth of the dual-comb spectrometer allows for precise separation of absorption signatures of individual molecules from the congested spectra. (c) 2020 The Combustion Institute. Published by Elsevier Inc. All rights reserved.