Production of mixed gases of controlled composition by pressure

Details Production of mixed gases of controlled composition by pressure Production of mixed gases of controlled composition by pressure

1987-02-12

1987-11-10

Prunner, Kathleen J.

Gas separation

Means within gas stream for conducting concentrate to collector

55 58, 55 62, 55 68, B01D 5304

Patent

active

047055413

ABSTRACT:
Adjusted gas compositions having two or more components in desired proportions for particular industrial uses are obtained from available feed gas mixtures accompanied by recovery of one or more valuable individual gases of high purity, by a novel selective adsorption-desorption scheme carried out in a multi-column PSA system. Following initial adsorption of one or more components from the feed gas mixture at high pressure the sorbate-laden column is subjected to a high pressure rinse using as rinse gas the previously recovered more strongly adsorbed species. After the rinsing step, the column is depressured to a selected level and purged with part of the unsorbed gas effluent discharged during the initial adsorption step until a preset amount of the earlier sorbed gas is recovered in the purge effluent as the readjusted binary gas mixture of desired proportions. As an example, there is disclosed the production from a starting gas mixture rich in hydrogen and carbon monoxide, such as that obtained from steam-methane reforming, an industrially useful gas mixture having a desired H.sub.2 /CO ratio with the accompanying individual recovery of high purity hydrogen and carbon monoxide as by-products.

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patent: 4599094 (1986-07-01), Werner et al.

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