Fig. 3: Schematic diagram of the catalytic membrane Sabatier system: potential application in space technology and catalytic activity.
From: A membrane Sabatier system for water recovery and rocket propellant production
a Role of H2O vapor permseletive membrane in in-situ removal of water during CO2 methanation and its potential applications in space technology. b, c Catalytic CO2 conversion and CH4 selectivity by Ni/ZrO2, inside quartz and membrane reactor (GHSV = 16000 mL gcat.−1 h−1, P = 1.15 bar), respectively. d Long-term catalyst stability, pictorial images of quartz tube, H2O vapor permseletive membrane tube after reaction, and collected water from H2O vapor permseletive membrane during stability test. e Catalytic performance under three times on–off reaction conditions with a 10 h and 1 h each on and off, with H2O vapor permseletive membrane. (Reaction conditions for d and e H2/CO2 = 4/1, GHSV = 12,000 mL gcat.−1 h−1, P = 1.15 bar, T = 240 °C).
