2016-07-282016-07-282016-07-10ICES_2016_165http://hdl.handle.net/2346/67571JapanRenaissance Energy Research CorporationJapan Aerospace exploration Agency302ICES302: Physio-chemical Life Support- Air Revitalization Systems -Technology and Process DevelopmentVienna, AustriaOsamu Okada, Renaissance Energy Research Corporation, JapanTsutomu Nonouchi, Renaissance Energy Research Corporation, JapanNobuaki Hanai, Renaissance Energy Research Corporation, JapanJunya Miyata, Renaissance Energy Research Corporation, JapanYasato Kiyohara, Renaissance Energy Research Corporation, JapanMasaaki Teramoto, Renaissance Energy Research Corporation, JapanMasato Sakurai, Japan Aerospace Exploration Agency, JapanThe 46th International Conference on Environmental Systems was held in Vienna, Austria, USA on 10 July 2016 through 14 July 2016.For the CO2 control in the space station, membrane separation is attractive as it is a simple continuous system with low energy consumption and no capacity limit　as CO2 uptake at the feed side of the membrane and release at the permeate side occur simultaneously. In order to apply membranes for space use, development of membranes with extremely high CO2 selectivity over O2 and N2 is required for minimizing the O2 and N2 losses. In our previous paper　(ICES - 2014), we reported novel CO2 selective facilitated transport membranes. These are gel-type membranes supported on microporous membranes. The CO2 permeance and CO2/N2 selectivity measured by the sweep gas method were favorably compared to those reported so far. In the present study, a 0.75% CO2/99.3% O2 mixture was mainly used as a feed gas, and the membrane performance was evaluated by the vacuum mode method where the permeate side PS was kept at low pressures at room temperature without sweep gas. We found that PS was very important factor, which influences the membrane performance. As PS increased, both CO2 and O2 permeances increased with CO2/O2 selectivity higher than 4000. The CO2 permeance was 1.2E4 Ncm3/(cm2 s cmHg) at 75% of relative humidity. The CO2/N2 selectivity was about twice the CO2/O2 selectivity. As the CO2 partial pressure decreased, CO2 permeance increased. The performance of the membrane module, in which the developed membranes are supposed to be incorporated, was simulated. When the module is applied to space station, the estimated membrane area was about 43 m2 at the CO2 removal rate (CRR) of 1 kg/day. In the case of space suit, the area was about 46 m2 at CRR=93g/h. The CO2 concentration recovered from the permeate side of the membrane is higher than 95% suggesting very small O2 and N2 losses.application/pdfengCO2 controlfacilitated transport membraneCO2 selective membranspace stationspace suitPresentation