초록 ▼

There is provided an improved selective adsorption process for the recovery of a light gas, especially hydrogen, from a feed gas mixture by utilizing a membrane permeator unit selectively permeable to said light gas to recover a more concentrated light gas from a stream comprising said light gas use

There is provided an improved selective adsorption process for the recovery of a light gas, especially hydrogen, from a feed gas mixture by utilizing a membrane permeator unit selectively permeable to said light gas to recover a more concentrated light gas from a stream comprising said light gas used to regenerate a selective adsorber unit and recycling the concentrated light gas to the selective adsorber unit, either blended with the feed gas mixture or as purging gas, for recovery of an added proportion of highly purified light gas product, and the system of apparatus for effecting the improved selective adsorption process.

대표청구항 ▼

In a selective adsorption process wherein a feed gas mixture having a light gas component is directed to a selective adsorption unit, a product light gas is obtained from said selective adsorption unit and a purge gas comprising light gas is obtained from said selective adsorption unit, the improvem

In a selective adsorption process wherein a feed gas mixture having a light gas component is directed to a selective adsorption unit, a product light gas is obtained from said selective adsorption unit and a purge gas comprising light gas is obtained from said selective adsorption unit, the improvement comprising directing said purge gas to a membrane permeator selectively permeable to said light gas, recovering from said permeator permeated gas comprising said light gas of a higher concentration than in said purge gas and directing said permeated gas to said selective adsorption unit. A system for improving recovery of a light gas by a selective adsorption unit having a plurality of selective adsorbers, at least one gas inlet, a first outlet for a product comprising a light gas, a second outlet for purge gas, means for feeding a gas mixture to a feed gas inlet and means for recovering a product light gas from the first outlet of said selective adsorption unit, said system comprising: a membrane permeator unit comprising a plurality of membranes selectively permeable to said light gas, having a gas inlet, a first outlet for permeated gas and a second outlet for a non-permeated gas mixture, means for directing the purge gas from the second outlet of said selective adsorption unit to the gas inlet of the membrane permeator unit, and means for directing the permeated gas from the first outlet of the membrane permeator unit to at least one of said feed gas inlet or a purging gas inlet of said selective adsorption unit.