Quantum cascade laser photoacoustic detection of nitrous oxide released from soils for biofuel production

Couto, F. M.; Sthel, Marcelo Silva; Castro, Maria Priscila Pessanha de; Silva, M. G. da; Rocha, Mila Vieira da; Tavares, Juliana; Veiga, C. F. M.; Vargas, H.

doi:10.1007/s00340-014-5906-y

Cited by 12 publications

(6 citation statements)

References 34 publications

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“…To meet such needs, the sensor needs to be sensitive (e.g., as low as 25 ppb for environmental site identification), portable, and low-cost . Several methods for detecting N 2 O are being used such as infrared laser spectroscopy using quantum cascade lasers (QCL), chromatography, and amperometry. − In this review, various portable N 2 O sensors [i.e., microelectromechanical system (MEMS)-based nondispersive infrared (NDIR) adsorption, electrochemical, and chemiresistive] are evaluated and compared. Additionally, we have suggested different sensing materials [metal–organic frameworks (MOFs)] that might be able to further increase sensing performance and functionality in N 2 O detection.…”

mentioning

confidence: 99%

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Milam-Guerrero

Yang

et al. 2022

ACS Sens.

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Nitrous oxide (N 2 O), also known as laughing gas, is arguably one of the most detrimental greenhouse gases while concurrently being overlooked by the public. Specifically, N 2 O is ∼300 times more damaging than its better-known counterpart carbon dioxide (CO 2 ) and has a longer-lived lifetime in the atmosphere than CO 2 . There exist both natural and anthropogenic sources of N 2 O, and thus, for a better understanding of sources, capture, and decomposition, it is pivotal to identify N 2 O within the nitrogen biosphere. This review covers the past and current low-cost N 2 O gas-sensing technologies, focusing specifically on low-cost metal oxide semiconductors (MOSs), chemiresistive and electrochemical sensors that can provide spatial and temporal monitoring of N 2 O emissions from various sources. Additionally, compositional modifications to MOsS using metal− organic frameworks (MOFs) are discussed, potentially facilitating new awareness and efforts for increased sensing performance and functionality in N 2 O detection.

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confidence: 99%

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Milam-Guerrero

Yang

et al. 2022

ACS Sens.

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“…This signal is essentially baseline-free as it is influenced neither by incoherent noise (acoustic noise from outside the PA cell) nor by coherent noise, as caused by wideband window absorption. , Detection methods with QCLs and multi pass sample cells have been developed . Only a few examples on the combination of QCLs with photoacoustic spectroscopy (PAS) are described in the literature. ,,, …”

Section: Pa Detection Of N2omentioning

confidence: 99%

“…21 Only a few examples on the combination of QCLs with photoacoustic spectroscopy (PAS) are described in the literature. 16,17,22,23 In this paper, we present two new PA instruments for the detection of N 2 O emissions from wastewater treatment plants (WWTPs). The instruments were combined with a dedicated sampling system to collect gaseous emissions from WWTP reactors.…”

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confidence: 99%

Photoacoustic Spectroscopy for the Quantification of N₂O in the Off-Gas of Wastewater Treatment Plants

et al. 2017

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Different configurations of photoacoustic (PA) setups for the online-measurement of gaseous NO, employing semiconductor lasers at 2.9 and 4.5 μm, were developed and tested. Their performance was assessed with respect to the analysis of NO emissions from wastewater treatment plants. For this purpose, the local NO emissions of a wastewater treatment bioreactor was sampled by a dedicated mobile sampling device, and the total NO emissions were analyzed in the gastight headspace of the bioreactor. We found that the use of a quantum-cascade laser emitting at about 4.53 μm, operated in a wavelength modulation mode, in combination with a conventional longitudinal PA cell yielded the highest sensitivity (<100 ppbv). However, we also observed a strong cross-sensitivity to humidity, which can be explained by increased V-T relaxation. This observation in combination with the limited dynamic range (max conc. ∼ 3000 ppmv) led us to the use of the less-sensitive but spectroscopically more robust 2.9 μm laser. A detection limit below 1 ppmv, a dynamic range of more than 4 orders of magnitude, no influence of humidity or any other substance relevant to the off-gas analysis, as well as a comparable low price of the laser source made it the ideal tool for NO analyses of the off-gas of a wastewater treatment plant. Such a system was implemented successfully in a full-scale wastewater treatment plant. The results regarding the comparison of different PA setups can be transferred to other systems, and the optimum performance can be selected according to the specific demands.

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“…In addition, a wide range of factors affects the rate of emission including but not limited to pH, temperature, moisture, soil composition, and microflora 5 . Currently, extensive research has been focused on fundamentally understanding the processes involved in N 2 O emissions from soil and aquatic systems, and have triggered substantial interest in the to the development of analytical strategies and methods providing reliable and accurate data 11 – 15 .…”

Section: Introductionmentioning

confidence: 99%

“…Among the optical sensors, the mid-infrared spectral region (MIR; 2.5–25 μm) has been widely utilized for N 2 O detection 11 , 16 , 17 utilizing IR-absorption phenomena 18 . To achieve the desired sensitivity, usually multi-pass gas cell providing extended absorption path lengths are applied.…”

Section: Introductionmentioning

confidence: 99%

A Hyphenated Preconcentrator-Infrared-Hollow-Waveguide Sensor System for N2O Sensing

Petruci

Wilk

Cardoso

et al. 2018

Sci Rep

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Following the Kyoto protocol, all signatory countries must provide an annual inventory of greenhouse-gas emission including N2O. This fact associated with the wide variety of sources for N2O emissions requires appropriate sensor technologies facilitating in-situ monitoring, compact dimensions, ease of operation, and sufficient sensitivity for addressing such emission scenarios. In this contribution, we therefore describe an innovative portable mid-infrared chemical sensor system for quantifying gaseous N2O via coupling a substrate-integrated hollow waveguide (iHWG) simultaneously serving as highly miniaturized mid-infrared photon conduit and gas cell to a custom-made preconcentrator. N2O was collected onto a solid sorbent material packed into the preconcentrator unit, and then released via thermal desorption into the iHWG-MIR sensor utilizing a compact Fourier transform infrared (FTIR) spectrometer for molecularly selective spectroscopic detection with a limit of detection (LOD) at 5 ppbv. Highlighting the device flexibility in terms of sampling time, flow-rate, and iHWG design facilitates tailoring the developed preconcentrator-iHWG device towards a wide variety of application scenarios ranging from soil and aquatic emission monitoring and drone- or unmanned aerial vehicle (UAV)-mounted monitoring systems to clinical/medical analysis scenarios.

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Quantum cascade laser photoacoustic detection of nitrous oxide released from soils for biofuel production

Cited by 12 publications

References 34 publications

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Photoacoustic Spectroscopy for the Quantification of N₂O in the Off-Gas of Wastewater Treatment Plants

A Hyphenated Preconcentrator-Infrared-Hollow-Waveguide Sensor System for N2O Sensing

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Quantum cascade laser photoacoustic detection of nitrous oxide released from soils for biofuel production

Cited by 12 publications

References 34 publications

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Photoacoustic Spectroscopy for the Quantification of N2O in the Off-Gas of Wastewater Treatment Plants

A Hyphenated Preconcentrator-Infrared-Hollow-Waveguide Sensor System for N2O Sensing

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Photoacoustic Spectroscopy for the Quantification of N₂O in the Off-Gas of Wastewater Treatment Plants