Zeolite membranes for gas separations

摘要

Silicalite-1, a pure silica zeolite, was deposited on a tubular, asymmetric, (gamma)-alumina support. Single gas permeation experiments with N(sub 2), CH(sub 4), and CO(sub 2) were carried out on the membrane. Separation experiments for N(sub 2)/CH(sub 4) mixtures were also conducted. Single-gas permeation of H(sub 2) and separation of H(sub 2)/SF(sub 6) mixture were also carried out with the membrane. Composite membranes of silicalite and Ni-SAPO-34 were also fabricated, but no CO(sub 2)/H(sub 2) selectivity was found. It is proposed to use these membranes for methanol synthesis and separation, and for separating H(sub 2) from gasification products for use as fuel cell fuel, etc.