Raman Natural Gas Analyzer: Effects of Composition on Measurement Precision

Petrov, Dmitri; Matrosov, I. I.; Zaripov, A. R.; Tanichev, Aleksandr S.

doi:10.3390/s22093492

Cited by 20 publications

(21 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…45 In this regard, Raman spectroscopy has become a promising method for measuring such gas mixtures. 46 A natural gas sample was taken from one of the natural gas mines in China. The Raman spectra of the sample are presented in Figure 5 with the sample pressure of 64 kPa.…”

Section: ■ Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Multiple Gas Detection by Cavity-Enhanced Raman Spectroscopy with Sub-ppm Sensitivity

Yang

Tan

Qu³

et al. 2023

Anal. Chem.

View full text Add to dashboard Cite

Accurate and sensitive detection of multicomponent trace gases below the parts-per-million (ppm) level is needed in a variety of medical, industrial, and environmental applications. Raman spectroscopy can identify multiple molecules in the sample simultaneously and has excellent potential for fast diagnosis of various samples, but applications are often limited by its sensitivity. In this contribution, we report the development of a cavity-enhanced Raman spectroscopy instrument using a narrow-line width 532 nm laser locked with a high-finesse cavity through a Pound-Drever-Hall locking servo, which allows continuous measurement in a broad spectral range. An intracavity laser power of up to 1 kW was achieved with an incident laser power of about 240 mW, resulting in a significant enhancement of the Raman signal in the range of 200–5000 cm–1 and a sub-ppm sensitivity for various molecules. The technique is applied in the detection of different samples, including ambient air, natural gas, and reference gas of sulfur hexafluoride, demonstrating its capability for the quantitative measurement of various trace components.

show abstract

Section: ■ Applicationsmentioning

confidence: 99%

“…A high-sensitivity and multicomponent analysis of natural gases is often required in the transportation and refining of natural gas, which is necessary for balancing the networks as well as in production, trade, and other applications . In this regard, Raman spectroscopy has become a promising method for measuring such gas mixtures …”

Section: Applicationsmentioning

confidence: 99%

Multiple Gas Detection by Cavity-Enhanced Raman Spectroscopy with Sub-ppm Sensitivity

Yang

Tan

Qu³

et al. 2023

Anal. Chem.

View full text Add to dashboard Cite

show abstract

“…In addition, some demand the use of consumables, replacement of sensor parts and the maintenance by trained personnel. The Raman spectroscopy has already proven its capacity in the field of natural gas analysis 2,3,4 . In addition, it is inherently a contactless and multispecies technique.…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy applied to the online measurement of natural gas composition

Melison

Cocola

Meneghin

et al. 2023

Optical Sensors 2023

View full text Add to dashboard Cite

The combustible gas sector requires instrumentation to determine the composition and the quality of the gas mixtures flowing in the transport and distribution networks. The gas parameters need to be monitored over a wide interval, since mixtures are found within an extremely variable range. A compact, fast and highly sensitive instrument based on Raman spectroscopy has been developed with the specific aim to operate directly on-line. This approach is intrinsically non-invasive, since it only needs a laser beam passing through the gas, and multi-species sensitive, since the different components of the gas mixture are simultaneously detected. The Raman scattering is pumped by a laser diode operating at 455 nm with multi-mode emission and 1.5 W optical power. The laser is focused on a gas cell through a lens, the Raman emission is collected by a grating spectrometer and finally acquired by a 2D camera. The measured spectra are fitted with the calibration dataset acquired at room temperature to evaluate the mixture composition.The system is able to determine the main components of the natural gas: methane, heavier hydrocarbons, nitrogen, carbon dioxide and hydrogen. The Heating Value (HV) is finally calculated according to the ISO6976:2016 standard. Several certified gas mixtures have been tested with the instrument operating at different temperatures in the range from -20°C to 50°C, to prove the capability to operate in a wide industrial temperature range. Each measure requires less than 25 seconds, with a sample pressure of 6 bars. The calculated HV value lies within the ±0.5% error range.

show abstract

“…Refs. [ 8 , 9 ] are significant examples of the very numerous and various applications of the vibrational spectroscopies, such as Fourier Transform Infrared (FT-IR) and Raman spectroscopy, that span from basic research, medicine, and biology to agrifood, industry, and many other fields.…”

mentioning

confidence: 99%

“…Ref. [ 9 ] addresses a completely different field of application for Raman spectroscopy. In fact, this paper discusses the possibility of using this spectroscopy for analyzing natural gas by taking advantage of Raman spectroscopy’s high-speed measurement and the potential to monitor all molecular components simultaneously.…”

mentioning

confidence: 99%