Multiday Measurements of Pneumatic Controller Emissions Reveal the Frequency of Abnormal Emissions Behavior at Natural Gas Gathering Stations

Gas-driven pneumatic controllers (PCs) and actuators used in all natural gas sectors vent uncombusted natural gas to the atmosphere during operation and contribute approximately 20% of methane emissions from the natural gas supply chain. In this study, multiday measurements were utilized to better characterize PC emission rate profiles. Emissions from 72 PCs were successfully measured at 16 gathering compressor stations for an average of 76 h...