FAS Abstracts 2004 Meeting Page

Environmental Chemistry & Chemical Sciences A (ENV): ENV-6

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Hydrogen recovery using metal alloys. M.T. OZTEK, M.D. HAMPTON, J. LOMNESS, and D. CAUCEGLIA. Dept. of Chemistry, Univ. of Central Florida, Orlando, FL, 32816. Considerable amounts of hydrogen is lost through boil off from storage systems at the Kennedy Space Center. Intermetallic compounds and alloys that are known to reversibly absorb hydrogen were investigated for recovery of this boil off hydrogen. A stainless steel isothermal reactor was constructed with pressure transducers installed at the inlet and outlet points. The exit stream was directed to a gas chromatograph and a digital flowmeter.  With this system, the pressure drop across the absorbing bed as well as the composition of the exiting gas were measured while the temperature, pressure, and flow rate were controlled. The resulting data provided information on the hydrogen uptake rates and capacities of various alloys of Zr, V, and Ni as a function of pressure, temperature, and flow rate as well as alloy composition. The effects of cycling were also determined.