Analysis of Natural Gas Using a Portable Hollow-Core Photonic Crystal Coupled Raman Spectrometer

A simple model to simulate the Raman spectrum of methane in the range of 2800–3040 cm−1

“…How to cite this article: A. S. Tanichev, D. V. Petrov, M. A. Kostenko, J Raman Spectrosc 2023, 54 (10), 1150. https://doi.org/10.1002/jrs.6572…”

“…Gas analyzers based on the Raman effect can take on the role of state‐of‐the‐art systems because the characteristics of continuous‐wave lasers and multichannel photodetectors have improved significantly over the past decade. Several studies have shown that the accuracy of measuring the composition of natural gas by Raman spectroscopy is getting close to the level of gas chromatography 5–15 …”

Ambient Hydrocarbon Detection with an Ultra-Low-Loss Cavity Raman Analyzer

“…Numerous recent studies have highlighted this capability. For example, natural gas has been characterized in detail with as many as seven to eight chemicals identified simultaneously. , Premixed samples of hydrocarbons in air have also been characterized successfully, with the limit of detection for some hydrocarbons as low as 90 ppm . However, while these efforts constitute a significant step forward in SRS spectroscopy, further improvements are clearly needed to deploy the technique for highly dilute detection at concentrations well below 1 ppm, routinely achieved with competing methods.…”

Comment on Hydrogen and C2–C6 Alkane Sensing in Complex Fuel Gas Mixtures with Fiber-Enhanced Raman Spectroscopy

“…Over the past decades, the sensitivity of Raman spectrometers for gases has improved significantly. This is due to the use of special optical systems based on fiber enhancement (FERS), − cavity enhancement (CERS), − as well as multipass excitation. − One of the promising applications of Raman spectroscopy is the analysis of the natural gas composition, since this method has many advantages over conventional gas chromatography . In ref , it was shown that FERS enables the simultaneous analysis of C2–C6 alkanes with limits of detection between 90 and 180 ppm.…”

“…The spectrum of a mixture of these components is rather complex; therefore, to improve the interpretation of experimental data, the authors used calculations based on density functional theory (DFT). Since today many scientific groups are developing a method for analyzing the composition of natural gas using Raman spectroscopy ,,,− and are interested in obtaining new and useful data, we decided to comment on the presented results.…”