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An adsorption process for the recovery of hydrogen from a feed gas or vapor which contains hydrogen in admixture with one or more hydrocarbon components, alone or in admixture with non-hydrocarbon components. Particulate adsorbent solids are provided with a magnetizable component, or components, and

An adsorption process for the recovery of hydrogen from a feed gas or vapor which contains hydrogen in admixture with one or more hydrocarbon components, alone or in admixture with non-hydrocarbon components. Particulate adsorbent solids are provided with a magnetizable component, or components, and circulated between an adsorption zone in which hydrogen is concentrated in the off gas by contact of the adsorbent solids with the feed, and hydrogen recovered, and a desorption zone in which the exhausted solids are regenerated. Within the adsorption zone the feed is countercurrently contacted with the solids at relatively low temperature to selectively adsorb hydrocarbons, and perhaps other non-hydrogen components. The solids are formed into a moving, fluidized bed, and magnetically stabilized to suppress gross solids circulation while hydrocarbons are adsorbed from the feed. Occluded hydrogen is subsequently displaced from the particulate adsorbent solids with hydrocarbons, and the hydrocarbon enriched particulate adsorbent solids are then transported to the desorption zone. In the desorption zone the solids are fluidized, and the temperature of the bed is elevated sufficiently to desorb at least a portion of the hydrocarbons. The residual hydrocarbons are subsequently displaced, suitably with steam or water by contact with steam in a magnetically stabilized bed of the solids. The wet solids are then dried by contact with hydrogen to displace the water, and cooled to complete the regeneration.

대표청구항 ▼

In an adsorption process for the recovery of hydrogen from a vapor or gas feed containing hydrogen in admixture with one or more component hydrocarbons, alone or in admixture with non-hydrocarbon components, wherein particulate adsorbent solids are circulated between an adsorption zone for contact w

In an adsorption process for the recovery of hydrogen from a vapor or gas feed containing hydrogen in admixture with one or more component hydrocarbons, alone or in admixture with non-hydrocarbon components, wherein particulate adsorbent solids are circulated between an adsorption zone for contact with said feed at relatively low temperature to selectively adsorb hydrocarbons and thereby concentrate the hydrogen within the off gas from said adsorption zone for recovery, the particulate adsorbent solids which selectively adsorb hydrocarbon components are transported to a desorption zone operated at sufficient temperature above that of the adsorption zone to desorb hydrocarbon and regenerate the said particulate adsorbent solids, the regenerated particulate adsorbent solids are cooled and recycled to said adsorption zone the improvement comprising (a) contacting countercurrently said feed in said adsorption zone with a downwardly moving, fluidized bed of the particulate adsorbent solids provided with a magnetic component, magnetically stabilizing said bed to suppress the gross circulation of adsorbent solids within said bed, while adsorbing hydrocarbons from said feed on said bed, withdrawing from said adsorption zone a hydrocarbon-denuded gas stream of higher hydrogen content than that contained in the feed entering said magnetically stabilized adsorption zone, withdrawing hydrocarbon enriched, hydrogen-containing particulate adsorbent solids from said magnetically stabilized adsorption zone and passing same to a hydrogen displacement zone, and then (b) contacting countercurrently said hydrocarbon enriched, hydrogen containing particulate adsorbent solids in said hydrogen displacement zone by passing same in plug flow and contacting same with a hydrocarbon gas sufficient to substantially displace hydrogen, passing the displaced hydrogen into the adsorption zone, and removing the hydrogen denuded, hydrocarbon-containing particulate adsorbent solids from said hydrogen displacement zone and transporting same to the desorption zone. In an adsorption process for the recovery of hydrogen from a vapor or gas feed containing hydrogen in admixture with one or more component hydrocarbons, alone or in admixture with non-hydrocarbon components, wherein particulate adsorbent solids are circulated between an adsorption zone for contact with said feed at relatively low temperature to selectively adsorb hydrocarbons and thereby concentrate the hydrogen within the off gas from said adsorption zone for recovery, the particulate adsorbent solids which selectively adsorb hydrocarbons are transported to a desorption zone operated at sufficient temperature above that of the adsorption zone to desorb hydrocarbon and regenerate the said particulate adsorbent solids, the regenerated particulate adsorbent solids are cooled and recycled to said adsorption zone the improvement comprising (a) contacting countercurrently said feed in said adsorption zone with a downwardly moving, fluidized bed of the particulate adsorbent solids provided with a magnetic component, magnetically stabilizing said bed to suppress the gross circulation of adsorbent solids within said bed, while adsorbing hydrocarbons from said feed on said bed, withdrawing from said adsorption zone a hydrocarbon-denuded gas stream of higher hydrogen content than that contained in the feed entering said magnetically stabilized adsorption zone, withdrawing hydrocarbon enriched, hydrogen-containing particulate adsorbent solids from said magnetically stabilized adsorption zone and passing same to a hydrogen displacement zone, (b) contacting countercurrently said hydrocarbon-enriched, hydrogen-containing particulate adsorbent solids in said hydrogen displacement zone by passing same in plug flow and contacting same with a hydrocarbon gas sufficient to substantially displace hydrogen, passing the displaced hydrogen into the adsorption zone, and removing the hydrogen-denuded, hydrocarbon-containing particulate adsorbent solids from said hydrogen displacement zone and transporting same to the desorption zone. (c) heating in the desorption zone a fluidized bed of said hydrogen-denuded, hydrocarbon-containing particulate solids at temperature sufficient to desorb hydrocarbons from said particulate solids, removing hydrocarbons from said zone, and passing particulate adsorbent solids containing at least residual amounts of hydrocarbons to a hydrogen stripping zone, and (d) in said hydrogen stripping zone, contacting counter-currently with hydrogen, the residual hydrocarbons-containing particulate adsorbent solids as a moving, fluidized bed, while magnetically stabilizing said bed to suppress the gross circulation of adsorbent solids within said bed, to desorb, and substantially displace the residual hydrocarbons with hydrogen.