Methane Maps of DISH and Flower Mound (Texas) - Likely Indication of Benzene and VOCs
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Methane Maps of DISH and Flower Mound (Texas) - Likely Indication of Benzene and VOCs

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This map shows results of drive-by emissions sampling in DISH, Texas and neighboring Flower Mound as well as other parts of the Dallas-Fort Worth Area. The large plumes are possible indications of ...

This map shows results of drive-by emissions sampling in DISH, Texas and neighboring Flower Mound as well as other parts of the Dallas-Fort Worth Area. The large plumes are possible indications of emissions of toxic VOCs from natural gas compression and storage facilities.

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Methane Maps of DISH and Flower Mound (Texas) - Likely Indication of Benzene and VOCs Methane Maps of DISH and Flower Mound (Texas) - Likely Indication of Benzene and VOCs Presentation Transcript

  • Methane Mapping Chris Rella, Ph. D., Director of R&D (rella@picarro.com) Picarro, Inc.
  • What is Methane?
    • Present in the atmosphere at low levels – 1.8 parts-per-million (ppm)
    • Primary constituent of natural gas
    • Emitted by a variety of sources
      • Farms
      • Landfills
      • Wetlands
      • Industrial activities of all types
    • Powerful greenhouse gas
    • Non-toxic at ppm levels
      • Sometimes accompanied by other more toxic chemicals
  • Methane Mapping
    • Our goal is to provide a map of airborne methane for:
      • Rapid hunting and tracking of natural gas product leaks
      • Distinguishing between different sources of methane (both natural and human)
      • Identifying areas of concern for more careful, quantitative studies of airborne emissions
    • We need to build a methane measurement tool that is
      • Fast – responds in seconds
      • Accurate – Measures methane, and only methane, very accurately
      • Easy – something anyone can use
    • World’s Highest Performance and Easiest to Use Analyzers
    What is Picarro? 10”
  • Picarro – world class greenhouse gas monitors
    • Picarro Technology chosen as the Gold Standard by the UN’s World Meteorological Organization (WMO)
    • Hundreds of units installed in 45 countries and on all 7 continents and in every ecosystem imaginable
    • Used by virtually every major international GHG monitoring network:
      • - NOAA - Australia CSIRO
      • - Chinese Meteorological Agency - Environment Canada
      • EU’s ICOS - German EPA
      • France’s LSCE - Irish EPA
      • Japan’s NIES - Swiss EPA
      • Korean Meteorological Association - Too many universities to mention
  • What’s inside the box?
    • Cavity Ringdown Spectroscopy
      • “ Cavity” – 10 inches long, but 10 mile path length = parts-per-billion
      • “ Ringdown” – this is a measurement of time = accurate
      • “ Spectroscopy” – measures ONLY methane = not confused by other chemicals
    • Ruggedized for use in the field
  • Measure Anywhere Vessels Aircraft Highways Telecom Buildings Cities Fields Mountains Blimps Landfills
  • Methane measurements on the road
    • Picarro CRDS methane (model G1202)
      • ppb resolution for both gases in just a few seconds
      • Accurate, robust, and easy-to-deploy
    • High resolution GPS
    • Batteries for mobile operation
    • Reporting of data directly into Google Earth to make the maps
    Gas snorkel GPS antenna batteries Picarro CRDS
  • A typical map
    • The “ribbon” of data shows where we traveled
    • The height above the ground shows the methane concentration at that location
    800 ft above ground = 1 ppm of methane 55 mph Methane: +0.1 ppm
  • DISH, Tx – Wind Data Measurements taken @ 1-3 pm Wind from the NW www.wunderground.com
    • Width of peak + direction of wind indicates a rough “footprint” of where the source is likely to be
    • Measurements with different wind directions can be used to triangulate the source
    Where is the source? wind
  • Roadside source, looking downwind
    • No obvious source visible on satellite image from 2001
    • On-site inspection would reveal likely source
    • Remember: high concentrations does not necessarily mean big emissions!
      • Distance to source
      • Wind speed
      • Still air vs. turbulent air
    • Methane mapping is not the same as emissions quantification
    Methane: +11 ppm wind
  • Outlook for methane mapping
    • Measuring methane accurately, in real time, from a vehicle is a powerful tool to help identify and quantify sources of methane
      • Leak detection
      • Source identification
      • Choosing target areas for future measurements
    • Further work: to extend this technique to provide quantification of emissions (in tons / year) for methane and other chemicals