Reactive-Separator Process Unit for Lunar Regolith

NASA's plans for a lunar habitation outpost call out for process technologies to separate hydrogen sulfide and sulfur dioxide gases from regolith product gas streams. A low-pressure drop separation unit is needed to remove these sulfur compounds from regolith process streams that is compact and lightweight. To this end, Reactive Innovations, LLC proposes to develop an electrochemical reactive-separation unit to selectively bind and remove the sulfur compounds into a separated stream of sulfur-based compounds. During the Phase I program, we will develop and demonstrate an electrochemical reactive-separation platform that binds sulfur compounds via a charge transfer process to a redox carrier that is subsequently transported across a membrane separator releasing the sulfur components. In this effort, we will demonstrate the redox carrier for binding and releasing sulfur components, develop and assess electrodes that are corrosion resistant to the sulfur compounds, and culminate with a prototype reactive-separator unit design and evaluation for removing sulfur components from regolith streams. By the end of the Phase I effort, this lunar regolith reactive-separator unit will be at a Technology Readiness Level of 3 with a Phase II program delivering an operational reactive-separator at a TRL of 4-5.