基于PAS的高浓度甲烷同位素拓扑分析

Marc-Simon Bahr, M. Wolff
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引用次数: 2

摘要

光声光谱法(PAS)通常用于痕量气体的检测。通过这种方式,可以分析短链烃如甲烷、乙烷或丙烷的混合物,其检测限在百万分之一(ppm)或十亿分之一(ppb)或甚至更低的范围内。然而,在许多应用中,需要对高浓度混合物进行分析。在某些情况下,甚至需要确定某些碳氢化合物的同位素组成。例子可以在天然气生产和行星研究中找到。我们提出了基于PAS的氮中甲烷浓度两位数百分比水平的同位素分析。这项研究可以得出PAS在多大程度上适用于未稀释的类天然气混合物的同位素分析的结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
PAS-based isotopologic analysis of highly concentrated methane
Photoacoustic spectroscopy (PAS) is typically used for the detection of trace gases. In this way, mixtures of short-chain hydrocarbons such as methane, ethane or propane can be analyzed with detection limits in the range of parts per million (ppm) or parts per billion (ppb) or even below. However, there are a number of applications where highly concentrated mixtures need to be analyzed. In some cases even the isotopologic composition of certain hydrocarbons needs to be determined. Examples can be found in natural gas production and planetary research. We present PAS-based isotopologic analyses of two digit percentage-level methane concentrations in nitrogen. The investigation allows conclusions to be drawn about the extent to which PAS is suitable for an isotopologic analysis of undiluted natural gas-like mixtures.
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