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OwnerYu Wang, Edward W. Corcoran, JR. +1inventors
InventorsYu Wang, Edward W. Corcoran, JR., Avelino Corma Canos
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This disclosure relates to the adsorption and separation of carbon dioxide in a feed stream (e.g., natural gas) using zeolite ITQ-55 as the adsorbent. A process is disclosed for removing impurities such as carbon dioxide and nitrogen while producing a hydrocarbon product. The process involves passing a feed stream through a bed of an adsorbent comprising zeolite ITQ-55 to adsorb carbon dioxide from the feed stream, thereby producing a product stream depleted in carbon dioxide. The zeolite ITQ-55 has a mean crystal particle size within the range of from about 0.1 microns to about 100 microns. The feed stream is exposed to the zeolite ITQ-55 at effective conditions for performing a kinetic separation, in which the kinetic separation exhibits greater kinetic selectivity for carbon dioxide than for methane or nitrogen. The system and method of this disclosure are particularly suitable for use with feed streams in excess of 10 MMSCFD utilizing rapid cycle PSA operations by tuning crystals size.
A process for adsorbing carbon dioxide from a feed stream containing hydrocarbons and impurities, wherein the hydrocarbons comprise at least methane, and the impurities comprise at least carbon dioxide, said process comprising passing the feed stream through a bed of an adsorbent comprising zeolite ITQ-55 to adsorb carbon dioxide from the feed stream, thereby producing a product stream that is depleted in carbon dioxide;
A process for adsorbing carbon dioxide from a feed stream containing hydrocarbons and impurities, wherein the hydrocarbons comprise at least methane and the impurities comprise at least carbon dioxide, said process comprising passing the feed stream through one or more beds of adsorbent comprising a first adsorbent selective for carbon dioxide so as to adsorb carbon dioxide from the feed stream and a second adsorbent selective for carbon dioxide so as to further adsorb carbon dioxide from the feed stream, thereby producing a rejection product stream enriched in methane and depleted in carbon dioxide, wherein the first adsorbent comprises zeolite ITQ-55 and the second adsorbent comprises a zeolite containing one or more of (i) aluminum, (ii) phosphorus, and (iii) silicon, in a skeletal structure thereof;
A process for adsorbing carbon dioxide from a feed stream containing hydrocarbons and impurities, wherein the hydrocarbons comprise at least methane, and the impurities comprise at least carbon dioxide and nitrogen, said process comprising passing the feed stream through a bed of an adsorbent comprising zeolite ITQ-55 to adsorb carbon dioxide from the feed stream, thereby producing a product stream that is depleted in carbon dioxide;
A process of adsorbing carbon dioxide and nitrogen from a feed stream containing hydrocarbons and impurities, wherein the hydrocarbons comprise at least methane and the impurities comprise at least carbon dioxide and nitrogen, said process comprising passing the feed stream through one or more beds of adsorbent comprising a first adsorbent selective for carbon dioxide so as to adsorb carbon dioxide from the feed stream and a second adsorbent selective for nitrogen so as to adsorb nitrogen from the feed stream, thereby producing a product stream enriched in methane and depleted in carbon dioxide and nitrogen, wherein the first adsorbent comprises zeolite ITQ-55 and/or wherein the second adsorbent comprises zeolite ITQ-55;
Dependencies are inferred from the claim text.