CRYOSORPTION OF HYDROGEN BY 12-20K CARBON DIOXIDE CRYODEPOSITS
Final rept. Sep-Oct 1966
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
Pagination or Media Count:
Carbon dioxide cryodeposits were investigated to determine their ability to sorb H2. Various thickness from 0.00005 to 0.001 cm were used, at temperatures of 12, 16, and 20K. Pumping speeds of 28, 19, and 14 lsec-sq. cm were measured for the respective temperatures. An arbitrary Capacity of the CO2 cryodeposit for H2 was defined. Within the limits of the experimental parameters varied, this capacity was found to be a direct function of the thickness of the cryodeposit and increased logarithmically as the temperature was lowered. No cryopumping of H2 was observed with cryodeposits above 25K. The CO2 cryodeposits were readily contaminated by N2, and the H2 pumping speed dropped when N2 was flowed in simultaneously with the H2.
- Pumps, Filters, Pipes, Tubing, Fittings and Valves
- Test Facilities, Equipment and Methods