scholarly journals Open-path cavity ring-down methane sensor for mobile monitoring of natural gas emissions

2019 ◽  
Vol 27 (14) ◽  
pp. 20084 ◽  
Author(s):  
Laura E. Mchale ◽  
Benjamin Martinez ◽  
Thomas W. Miller ◽  
Azer P. Yalin
Keyword(s):  
Natural Gas ◽  
Mobile Monitoring ◽  
Gas Emissions ◽  
Methane Sensor ◽  
Open Path ◽  
Natural Gas Emissions ◽  
Cavity Ring Down

Open-Path C2H6 Sensor for Fast, Low-Power, Measurement of Natural Gas Emissions

2017 ◽  
Author(s):  
Levi Golston ◽  
Dana Caulton ◽  
James McSpiritt ◽  
Bernhard Buchholz ◽  
Da Pan ◽  
...  
Keyword(s):  
Natural Gas ◽  
Low Power ◽  
Power Measurement ◽  
Gas Emissions ◽  
Open Path ◽  
Natural Gas Emissions

Natural Gas Emissions from Underground Pipelines and Implications for Leak Detection

2019 ◽  
Vol 6 (7) ◽  
pp. 401-406 ◽  
Author(s):  
Bridget A. Ulrich ◽  
Melissa Mitton ◽  
Emily Lachenmeyer ◽  
Arsineh Hecobian ◽  
Daniel Zimmerle ◽  
...  
Keyword(s):  
Natural Gas ◽  
Leak Detection ◽  
Gas Emissions ◽  
Underground Pipelines ◽  
Natural Gas Emissions

scholarly journals Cavity Ring-Down Methane Sensor for Small Unmanned Aerial Systems

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 454 ◽  
Author(s):  
Benjamin Martinez ◽  
Thomas W. Miller ◽  
Azer P. Yalin
Keyword(s):  
Near Infrared ◽  
High Sensitivity ◽  
Unmanned Aerial Systems ◽  
Test Results ◽  
Methane Sensor ◽  
Open Path ◽  
Low Mass ◽  
Aerial Systems ◽  
High Finesse ◽  
Cavity Ring Down

We present the development, integration, and testing of an open-path cavity ring-down spectroscopy (CRDS) methane sensor for deployment on small unmanned aerial systems (sUAS). The open-path configuration used here (without pump or flow-cell) enables a low mass (4 kg) and low power (12 W) instrument that can be readily integrated to sUAS, defined here as having all-up mass of <25 kg. The instrument uses a compact telecom style laser at 1651 nm (near-infrared) and a linear 2-mirror high-finesse cavity. We show test results of flying the sensor on a DJI Matrice 600 hexacopter sUAS. The high sensitivity of the CRDS method allows sensitive methane detection with a precision of ~10–30 ppb demonstrated for actual flight conditions. A controlled release setup, where known mass flows are delivered, was used to simulate point-source methane emissions. Examples of methane plume detection from flight tests suggest that isolated plumes from sources with a mass flow as low as ~0.005 g/s can be detected. The sUAS sensor should have utility for emissions monitoring and quantification from natural gas infrastructure. To the best of our knowledge, it is also the first CRDS sensor directly deployed onboard an sUAS.

scholarly journals The origin of natural gas emissions from Sardinia island, Italy.

1999 ◽  
Vol 33 (1) ◽  
pp. 1-12 ◽  
Author(s):  
A. Minissale ◽  
G. Magro ◽  
F. Tassi ◽  
F. Frau ◽  
O. Vaselli
Keyword(s):  
Natural Gas ◽  
Gas Emissions ◽  
Natural Gas Emissions ◽  
Origin Of Natural Gas

(Invited) Additive Manufacturing of Mixed Potential Gas Sensors for Natural Gas Emissions Monitoring

2021 ◽  
Vol MA2021-02 (45) ◽  
pp. 1379-1379
Author(s):  
Lok-kun Tsui ◽  
Sleight Halley ◽  
Kamil Agi ◽  
Fernando H Garzon
Keyword(s):  
Additive Manufacturing ◽  
Natural Gas ◽  
Gas Sensors ◽  
Mixed Potential ◽  
Gas Emissions ◽  
Natural Gas Emissions

Acyl Peroxy Nitrates Link Oil and Natural Gas Emissions to High Ozone Abundances in the Colorado Front Range During Summer 2015

2019 ◽  
Vol 124 (4) ◽  
pp. 2336-2350 ◽  
Author(s):  
Jakob Lindaas ◽  
Delphine K. Farmer ◽  
Ilana B. Pollack ◽  
Andrew Abeleira ◽  
Frank Flocke ◽  
...  
Keyword(s):  
Natural Gas ◽  
Colorado Front Range ◽  
Front Range ◽  
Gas Emissions ◽  
Peroxy Nitrates ◽  
Oil And Natural Gas ◽  
Natural Gas Emissions

scholarly journals Direct estimates of emissions from the megacity of Lagos

2009 ◽  
Vol 9 (21) ◽  
pp. 8471-8477 ◽  
Author(s):  
J. R. Hopkins ◽  
M. J. Evans ◽  
J. D. Lee ◽  
A. C. Lewis ◽  
J. H Marsham ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Natural Gas ◽  
Top Down ◽  
Gas Emissions ◽  
Bottom Up ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Natural Gas Emissions

Abstract. We report here top-down emissions estimates for an African megacity. A boundary layer circumnavigation of Lagos, Nigeria was completed using the FAAM BAe146 aircraft as part of the AMMA project. These observations together with an inferred boundary layer height allow the flux of pollutants to be calculated. Extrapolation gives annual emissions for CO, NOx, and VOCs of 1.44 Tg yr−1, 0.03 Tg yr−1 and 0.37 Tg yr−1 respectively with uncertainties of +250/−60%. These inferred emissions are consistent with bottom-up estimates for other developing megacities and are attributed to the evaporation of fuels, mobile combustion and natural gas emissions.

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