Podcast: Improving inaccurate emissions data with new technology
Anna Townshend is managing editor of Plant Services and has been a journalist and editor for almost 20 years. In addition to writing and editing thousands of articles in her career, she has been an active speaker on industry panels and presentations. In this episode of Great Question: A Manufacturing Podcast, she reads her latest Maintenance Mindset article, where each week one of the Plant Services editors highlights important and interesting nuggets in the news about manufacturing and asset management.
Below is an excerpt from the podcast:
What if we could see greenhouse gases? Better yet, what if plant staff could identify toxic plumes or areas of high emissions through machine sensors? Scientists at the National Institute of Standards and Technology (NIST) are working on it, specifically upgrading our ability to measure and analyze greenhouse gas (GHG) emissions. They have their sights set on the more problematic of GHGs to measure—methane—and one that, at this point, could be doing more potential damage long-term than carbon dioxide. Scientists do have methods for gas measurement, but free-form dual-comb spectroscopy will be faster, more flexible and can perform more sensitive analysis (22 times higher sensitivity than traditional methods), potentially making it easier to identify emissions at the source.
For many process-based facilities, GHG emissions measurement is already a reality. Commitments to the 2015 Paris Agreement or Paris Climate Accord and achieving net zero GHG emissions by 2050, with a 50% reduction by 2030, will take much deeper emissions monitoring and reductions in industry and beyond.
Many industries are reporting annual GHG emissions, a total of more than 8,000 facilities as part of the EPA’s Greenhouse Gas Reporting Program (GHGRP). Every October EPA releases GHG emissions data from the previous year. Currently, power plants are the largest emitters, followed by oil and gas, and non-fluorinated chemical manufacturers, which produce ammonia, hydrogen, ethylene and other chemicals. GHG emissions are trending downward, according to GHGRP reporting, but not quickly enough.
EPA says: “For sources reporting to the GHGRP, emissions decreased by 4.4% from 2022 to 2023. Over the past thirteen reporting years (2011-2023), GHGRP reported direct emissions from sectors other than oil and gas (also excluding suppliers) declined by 27.1%. This decline is primarily caused by a 33.8% decline in reported power plant emissions since 2011.”
There are seven gases that collectively make up GHGs: carbon dioxide (CO2), methane (CH4), nitrous oxide (N20) and fluorinated man-made gases, such as hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulphur hexafluoride (SF6) and nitrogen trifluoride (NF3). While CO2 has been the primary culprit for climate change, methane gas is more efficient at trapping radiation, and therefore, 25 times more efficient at causing global warming than carbon dioxide, over a 100-year period. Methane is also harder to measure, in part, because of the diversity of its sources and geographic spread. CH4 largely comes from livestock farms, natural gas systems and landfill sites, and methane concentrations in the atmosphere are also increasing more rapidly than carbon dioxide.
Our atmosphere is already highly saturated with CO2 , and there’s essentially a lot more room for CH4 absorption, so it has a much larger chance to impact global warming moving forward. Methane concentrations are already 2.5 times higher than in preindustrial periods, compared to a 150% increase in carbon dioxide. EPA does support initiatives to reduce methane emissions, which have lowered by 19% from 1990 to 2022, including technology like vapor recovery units for centrifugal compressors. EPA says: “Crude oil and condensate production into atmospheric pressure fixed roof storage tanks creates a substantial volume of low-pressure methane gas emissions to the atmosphere. Vapor recovery units (VRUs) are commonly used to capture methane emissions from these tanks and a variety of other low pressure vented gas sources found across oil and gas operations, including pipeline pigging operations, compressors, and dehydrators.”
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About the Podcast
Great Question: A Manufacturing Podcast offers news and information for the people who make, store and move things and those who manage and maintain the facilities where that work gets done. Manufacturers from chemical producers to automakers to machine shops can listen for critical insights into the technologies, economic conditions and best practices that can influence how to best run facilities to reach operational excellence.
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About the Author

Anna Townshend
managing editor
Anna Townshend has been a journalist and editor for almost 20 years. She joined Control Design and Plant Services as managing editor in June 2020. Previously, for more than 10 years, she was the editor of Marina Dock Age and International Dredging Review. In addition to writing and editing thousands of articles in her career, she has been an active speaker on industry panels and presentations, as well as host for the Tool Belt and Control Intelligence podcasts. Email her at [email protected].