2021-06-232021-06-237/12/2021ICES-2021-33https://hdl.handle.net/2346/87052Amanda Childers, Honeywell International Inc.Stephen Yates, Honeywell International Inc.Nicholas Brom, Honeywell International Inc.Sean Skomurski, Honeywell International Inc.ICES302: Physio-chemical Life Support- Air Revitalization Systems -Technology and Process DevelopmentThe 50th International Conference on Environmental Systems was held virtually on 12 July 2021 through 14 July 2021.Future deep-space long-duration human exploration missions to Mars will require advanced oxygen recovery methods. Honeywell Aerospace is developing a methane pyrolysis technology for NASA that would recover hydrogen from the methane generated by the Sabatier unit currently used to reduce removed carbon dioxide. Complete pyrolysis of this methane to carbon increases the overall system oxygen recovery to almost 100%, while leveraging Sabatier technology. Additionally, by using high-surface area carbon capture fiber substrates, the waste carbon is non-sooty and easily handled � a technology differentiator that is vital for microgravity applications. While the fibrous substrate materials enable this performance, they also present an opportunity for continued optimization as flight implementation is considered; for a 1000-day mission, the mass of the current consumable substrates represents more than 2/3 the mass of the entire system. Minimizing the fiber volume fraction, while still ensuring non-sooty carbon deposition from methane, and maximizing substrate utilization will reduce starting mass and provide higher loading capacity, greatly reducing the overall mass and volume of the required consumable. Experimental work and alternative substrate materials have been used to identify consumable mass entitlement for enabling a fully closed-loop oxygen recovery system.application/pdfengcarbonmethane pyrolysisoxygen recoverySabatierPresentation