AAT designed and built a portable test station specifically for evaluating Safe-Cell II media performance on Propylene Oxide. The system consisted of a pressurized cylinder containing 4,500 ppmv of PO in Nitrogen, a pressure regulator, rotameter, test cell packed with AAT’s proprietary dry scrubber media, and a portable PO analyzer with a 0–50 ppmv range. Gas was flowed through the test cell at a fixed rate, and outlet concentrations were continuously monitored. As expected, initial outlet concentrations were near zero, representing nearly 100% removal by the fresh media.

The capacity of the media was determined by measuring the amount of PO treated while maintaining 99% removal efficiency. Results were highly encouraging, with two separate tests showing nearly identical outcomes. Measured capacity to 99% removal of PO was only slightly lower than for EtO, and the fresh media achieved a removal efficiency of 99.991%, compared to 99.995% for Ethylene Oxide. No measurable temperature rise occurred in either the cell or gas stream, confirming that no exothermic reaction posed a safety concern. The media depth and gas velocity in the test cell matched those used in full-scale systems, ensuring accurate prediction of commercial performance.

The conclusion was clear: AAT’s Safe-Cell II dry scrubbers effectively abate Propylene Oxide emissions with the same high efficiency, safety, and reliability long proven for Ethylene Oxide—continuing AAT’s mission to keep the air clean through advanced dry scrubbing technology.