拉曼光谱
积分球
光学
异丁烷
天然气
异戊烷
丙烷
材料科学
拉曼散射
杂散光
光谱学
分析化学(期刊)
化学
物理
催化作用
有机化学
色谱法
量子力学
生物化学
作者
fabing Li,Qiannan Zhao,Chengxin Sun,Lin Zhu,Jie Xia,Baokun Huang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-01-02
卷期号:48 (2): 187-187
摘要
Raman spectroscopy is a powerful method of probing natural gas components, but higher sensitivity, greater miniaturization, and lower cost techniques are required. Therefore, we designed a Raman integrating sphere-enhanced spectroscopy technology in a volume of 40 × 40 × 20 cm3 based on the principle of integrating sphere reflection. This technology consists of two parts: the first is an integrating sphere model to collect scattered signals, and the second is a right-angle light-boosting system to increase the optical path of the pump light in the sample. Raman integrating sphere technology has a detection limit of 0.5 ppm in the air with an exposure time of 600 s under room temperature and ambient pressure conditions. Experiments of natural gas detection display that the detection limits of ethane, propane, n-butane, isobutane, n-pentane, and isopentane are 28, 28, 95, 28, 189, and 95 ppm, respectively. In addition, there is a linear relationship between the relative Raman intensity and the concentration of each component in natural gas, which can be used as a probe for detecting unknown natural gas components in gas wells.
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