Filter for purifying hydrogen and method for manufacture...

Details Filter for purifying hydrogen and method for manufacture... Filter for purifying hydrogen and method for manufacture...

2005-10-18

2010-02-16

Greene, Jason M (Department: 1797)

Gas separation: apparatus

Apparatus for selective diffusion of gases

C096S011000, C095S055000, C095S056000, C055S523000, C055S524000, C055SDIG007, C216S017000, C216S041000, C216S056000, C205S265000, C205S291000

Reexamination Certificate

active

07662218

ABSTRACT:
A hydrogen-purification membrane comprises a Pd alloy film joined to one surface of a porous support substrate. Each pore in the porous support substrate is such that between the thickness T of the porous support substrate, the opening diameter D1of the pore on the side joined to the Pd alloy film and the opening diameter D2of the pore on the opposite side, there are relations represented by 1.0≦D1/T≦5.0 and 1.0≦D2/T≦5.0, and between the opening diameter D1of the pore on the side joined to the Pd alloy film, the opening diameter D2of the pore on the opposite side and the opening diameter D3of the narrowest portion of the pore there are relations represented by D3/D1<0.8, D3/D2<0.9 and D3<250 μm. Furthermore, the total opening area of the pores on the side joined to the Pd alloy film accounts for 20 to 80% of the area of the porous support substrate.

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