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We present a detailed description and experimental results for a new gas emission survey method that remotely detects and maps the locations of multiple gas emission sources distributed across an extensive area. Our method, which we call LightSource, not only localizes but also estimates the mass emission rates of each of the detected sources. The approach is generally applicable to any airborne contaminant that is passively transported and conserved during transport within the area of intere...

View 11:00:20 30 Nov 2017

Tunable diode laser spectroscopy (TDLS) is an important measurement technology for gas detection, offering both high sensitivity and specificity to the target gas. With this technique, much of the engineering requirement and achievable field performance is attributable to the gas cell in which the light interacts with the target gas. We present two new technologies for gas cells, each with different attributes, used for methane detection in different applications.  The first technology ha...

View 13:00:00 30 Nov 2017

Laser Dispersion Spectroscopy (LDS), is a new gas sensing technique that applies a novel approach to tuneable diode laser spectroscopy. Established laser absorption techniques depend on measuring detected intensity to derive concentration. This significantly impacts measurements in "dirty" environments where detected intensity of the transmitted light is bound to fluctuate. MIRICO's LDS-based instrument derives concentration using the phase of light. This makes it highly immune to intensity f...

View 14:00:00 30 Nov 2017

In 2014 the US Department of Energy's ARPA-E program initiated MONITOR, a 45M US$ investment in methane detection technologies. The eleven technologies funded under the program are reaching the end of their second development year and beginning field testing. Initial testing has been performed at the Methane Emissions Test and Evaluation Center (METEC) at Colorado State University, which reproduces emissions behavior at oil & gas (O&G) wells, small compressor stations, and underground gas gat...

View 10:00:00 30 Nov 2017

We present a case study of a validation experiment to characterise the precision and uncertainty constraints of a newly developed mass balancing flux calculation method, using in situ measurements of methane concentration sampled by an unmanned aerial vehicle (UAV) platform.  This case study (funded by the UK Environment Agency) was conducted by the University of Manchester and National Physical Laboratory with assistance from the UK Met Office at its Cardington research facility. The aim...

View 10:00:00 30 Nov 2017

National Grid Plc is incentivised by the Office of Gas and Electricity Markets (Ofgem) to conduct research into new techniques to enable National Grid Gas (NGG) to improve understanding and transparency, and allow for cost-effective mitigation, of greenhouse gas (GHG) venting on the National Transmission System (NTS). The mechanism by which this is done is special condition 8J of the Gas Transporters Licence, the Greenhouse Gas Investigation Mechanism (GHGIM). Since 2008 NGG has conducted...

View 11:00:00 30 Nov 2017

Atmospheric methane (CH4) has a powerful short-term global warming impact, and comes from a variety of natural and anthropogenic sources. Methane sources include wetlands, landfills, oil / gas / coal extraction activities, and urban emissions from traffic and the natural gas distribution system. Characterizing the magnitude and the origin of these fugitive emissions spatially and temporally is critical to understand their present and future climate impacts.  There are two tracer molecules...

View 09:50:00 30 Nov 2017

Methane is one of the most important gaseous hydrocarbon species for both industrial and environmental reasons. Understanding and quantifying methane emissions to atmosphere is an important element of climate change research. Range-resolved infrared Differential Absorption Lidar (DIAL) measurements provide the means to map and quantify a wide range of different methane sources. DIAL is a powerful technique that can be used to track and quantify plumes emitted from area emission sources suc...

View 14:25:00 30 Nov 2017

There is both considerable opposition and support for unconventional hydrocarbon extraction, commonly known as 'fracking'. Opposition and hesitancy focuses on two primary issues: 1) aquifer contamination and 2) the increased greenhouse gas (GHG) footprint associated with such activity, particularly the fugitive CH4 emissions, but also CO2 associated with the CH4 can also be released. The occurrence of aquifer contamination is likely to be heavily-monitored as significant regulation generally...

View 14:10:00 30 Nov 2017


Digital Edition

International Environmental Technology June 2021

June 2021

In This Edition Business News - Collaboration to enhance research in to atmospheric pollution - Leading sensor technology event affirms its leading role as a digital conference - Afriso ope...

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Events

DXC 2021

Aug 02 2021 Virtual event

DioXin 2021

Aug 22 2021 Xi'an, China

World Water Week

Aug 23 2021 Digital event

The Water Show Africa 2021

Aug 24 2021 Online event

AWRE 2021

Aug 25 2021 Sydney, Australia

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