2016-07-282016-07-282016-07-10ICES_2016_309http://hdl.handle.net/2346/67657United StatesNASA GRCNASA Glenn Research CenterAerfilUSRANASA510ICES510: Planetary and Spacecraft Dust Properties and Mitigation TechnologiesVienna, AustriaJuan H. Agui, NASA Glenn Research Center, USARobert Green, NASA Glenn Research Center, USAR. Vijayakumar, Aerfil, USAGordon Berger, Universities Space Research Association, USAZach Greenwood, NASA Marshall Space Flight Center, USAMorgan Abney, NASA Marshall Space Flight Center, USAElspeth Peterson, NASA Marshall Space Flight Center, USAThe 46th International Conference on Environmental Systems was held in Vienna, Austria, USA on 10 July 2016 through 14 July 2016.The ISS presently recovers oxygen from crew respiration via a Carbon Dioxide Reduction Assembly (CRA) that utilizes the Sabatier chemical process to reduce captured carbon dioxide to methane (CH4) and water. In order to recover more of the hydrogen from the methane and increase oxygen recovery, NASA Marshall Space Flight Center (MSFC) is investigating a technology, plasma pyrolysis, to convert the methane to acetylene. The Plasma Pyrolysis Assembly (or PPA), achieves 90% or greater conversion efficiency, but a small amount of solid carbon particulates are generated as a side product and must be filtered before the acetylene is removed and the hydrogen-rich gas stream is recycled back to the CRA. We discuss developmental work on several options for filtering out the carbon particulate emissions from the PPA exit gas stream. We also present supporting characterization results of the carbon particulates that help to define filter requirements.application/pdfengPlasma PyrolysisparticulatesfiltrationPresentation