2014-10-202014-10-202014-07-13978-0-692-38220-2ICES-2014-243http://hdl.handle.net/2346/59649The 44th International Conference on Environmental Systems was held in Tuscon, Arizona, USA on 13 July 2014 through 17 July 2014.Darrell Jan, NASA Ames Research Center, USAJohn Hogan, NASA Ames Research Center, USABrian Koss, NASA Ames Research Center, USAGary H. Palmer, NASA Ames Research Center, USATra-My Justine Richarson, CSS-Dynamac Corporation, NASA Ames Research Center, USAJames Knox, NASA Marshall Space Flight Center, USAPaul Linggi, University Space Research Association, NASA Ames Research Center, USARemoval of carbon dioxide (CO2) is a necessary step in air revitalization and is often accomplished with sorbent materials. Since moisture competes with CO2 in zeolite sorbent materials, it is necessary to remove the water first. This is typically accomplished in two stages: “bulk” removal and “residual” drying. Silica gel is used as the bulk drying material in the Carbon Dioxide Removal Assembly (CDRA) in operation on ISS. There has been some speculation that silica gel may also be capable of serving as the residual drying material. This paper describes test apparatus and procedures for determining the performance of silica gel in residual air drying.application/pdfengPresentation