Emerging Infrared Laser Absorption Spectroscopic Techniques for Gas Analysis

Tittel, Frank K.; Lewicki, R.; Lascola, Robert; McWhorter, Scott

doi:10.1002/9781118642771.ch4

Cited by 15 publications

(12 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The major players on TDL analyzers market are Neo Monitors (Norway), Focused Photonics Inc. (China), Yokogawa (Japan). More details on TDLS can be found in the reviews [25][26][27].…”

Section: Tunable Diode Laser Spectroscopy (Tdls)mentioning

confidence: 99%

Oxygen gas sensing technologies: A comprehensive review

Shuk

Jantz

2015

2015 9th International Conference on Sensing Technology (ICST)

View full text Add to dashboard Cite

Different oxygen gas sensing technologies, i.e., potentiometric, amperometric, paramagnetic and tunable diode laser spectroscopy (TDLS) are reviewed in details. Special attention is given to the theoretical aspects and operation basics of the technologies, application limits and analyzers or system requirements. A comprehensive technologies review is supported with the latest developments trends especially on the potentiometric zirconia and tunable diode laser analyzers.

show abstract

“…The major players on TDL analyzers market are Neo Monitors (Norway), Focused Photonics Inc. (China), Yokogawa (Japan). More details on TDLS can be found in the reviews [25][26][27].…”

Section: Tunable Diode Laser Spectroscopy (Tdls)mentioning

confidence: 99%

Oxygen gas sensing technologies: A comprehensive review

Shuk

Jantz

2015

2015 9th International Conference on Sensing Technology (ICST)

View full text Add to dashboard Cite

show abstract

“…Using these lasers as light sources, concentrations down to the ppb-ppt concentration can be measured at high speed [8–10]. Moreover, it is possible to avoid moving parts, allowing the design of robust and compact instruments.…”

Section: Introductionmentioning

confidence: 99%

On-line monitoring of methanol and methyl formate in the exhaust gas of an industrial formaldehyde production plant by a mid-IR gas sensor based on tunable Fabry-Pérot filter technology

et al. 2016

View full text Add to dashboard Cite

On-line monitoring of key chemicals in an industrial production plant ensures economic operation, guarantees the desired product quality, and provides additional in-depth information on the involved chemical processes. For that purpose, rapid, rugged, and flexible measurement systems at reasonable cost are required. Here, we present the application of a flexible mid-IR filtometer for industrial gas sensing. The developed prototype consists of a modulated thermal infrared source, a temperature-controlled gas cell for absorption measurement and an integrated device consisting of a Fabry-Pérot interferometer and a pyroelectric mid-IR detector. The prototype was calibrated in the research laboratory at TU Wien for measuring methanol and methyl formate in the concentration ranges from 660 to 4390 and 747 to 4610 ppmV. Subsequently, the prototype was transferred and installed at the project partner Metadynea Austria GmbH and linked to their Process Control System via a dedicated micro-controller and used for on-line monitoring of the process off-gas. Up to five process streams were sequentially monitored in a fully automated manner. The obtained readings for methanol and methyl formate concentrations provided useful information on the efficiency and correct functioning of the process plant. Of special interest for industry is the now added capability to monitor the start-up phase and process irregularities with high time resolution (5 s).

show abstract

“…Nowadays, optical gas sensors based on newly emerging infrared lasers allows one to probe strong fundamental rotational-vibrational transitions of the target molecules and thus to achieve very high measurement sensitivity (detection limit down to ppb and parts per trillion (ppt) levels). These field deployable optical gas sensors with a reduction in size and cost have become ease-to-use and can be operated by non-technical personnel [ 9 ]. Various spectroscopic techniques have been developed in order to achieve high detection sensitivity for CH 4 detection, such as photoacoustic spectroscopy (PAS) or quartz-enhanced photoacoustic spectroscopy (QEPAS) [ 10 , 11 , 12 ], open-path differential optical path absorption spectroscopy (DOAS) [ 13 ] and long-path absorption spectroscopy using a multipass cell [ 14 , 15 , 16 ] or a high-finesse optical cavity as in cavity ring-down spectroscopy (CRDS) [ 17 ] and off-axis integrated cavity output spectroscopy (OA-ICOS) [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

A Quantum Cascade Laser-Based Optical Sensor for Continuous Monitoring of Environmental Methane in Dunkirk (France)

Maamary

Cui

Fertein

et al. 2016

Sensors

View full text Add to dashboard Cite

A room-temperature continuous-wave (CW) quantum cascade laser (QCL)-based methane (CH4) sensor operating in the mid-infrared near 8 μm was developed for continuous measurement of CH4 concentrations in ambient air. The well-isolated absorption line (7F2,4 ← 8F1,2) of the ν4 fundamental band of CH4 located at 1255.0004 cm−1 was used for optical measurement of CH4 concentration by direct absorption in a White-type multipass cell with an effective path-length of 175 m. A 1σ (SNR = 1) detection limit of 33.3 ppb in 218 s was achieved with a measurement precision of 1.13%. The developed sensor was deployed in a campaign of measurements of time series CH4 concentration on a site near a suburban traffic road in Dunkirk (France) from 9 to 22 January 2013. An episode of high CH4 concentration of up to ~3 ppm has been observed and analyzed with the help of meteorological parameters combined with back trajectory calculation using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model of NOAA.

show abstract

Emerging Infrared Laser Absorption Spectroscopic Techniques for Gas Analysis

Cited by 15 publications

References 125 publications

Oxygen gas sensing technologies: A comprehensive review

Oxygen gas sensing technologies: A comprehensive review

On-line monitoring of methanol and methyl formate in the exhaust gas of an industrial formaldehyde production plant by a mid-IR gas sensor based on tunable Fabry-Pérot filter technology

A Quantum Cascade Laser-Based Optical Sensor for Continuous Monitoring of Environmental Methane in Dunkirk (France)

Contact Info

Product

Resources

About