Passivation carbonaceous adsorptive membranes

Details Passivation carbonaceous adsorptive membranes Passivation carbonaceous adsorptive membranes

1997-08-25

1999-06-15

Dudash, Diana

Coating processes

Heat decomposition of applied coating or base material

Coating decomposed to form carbide or coating carbonized

264 296, 264 297, 427244, 4273741, 427377, 4273984, B05D 302, B05D 304, C01B 3110

Patent

active

059120487

ABSTRACT:
Porous carbonaceous adsorptive membranes are protected or passivated from surface degradation in moist air by oxidizing the surface at relatively mild conditions after initial preparation of the membrane by pyrolysis. Carbon dioxide is a preferred passivating gas. Contact of passivated membranes with moist air at ambient conditions unexpectedly improves membrane effectiveness in separating gas mixtures containing hydrogen and light hydrocarbons.

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Verma, S. K. and Walker, P.L., Jr. "Carbon Molecular Sieves with Stable Hydrophobic Surfaces." Carbon 30 (6) 1992: 837-44 (no month).

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