EP0004465A2
Expired / Lapsed
EP
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Method of regenerating adsorbents
Assignee: Air Products and Chemicals Inc
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Filing: 1979-03-23
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Granted: —
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Expires: 1999-03-23
Abstract
Abstract Water and carbon dioxide contaminants are removed from a feed gas stream by adsorption in first and second adsorbent zones arranged in series. Regeneration of the adsorbent zones is accomplished by (a) introducing a heated regeneration gas intermediate the first and second adsorbent zones and passing the heated regeneration gas through the first adsorbent zone; and (b) subsequently passing a low temperature regeneration gas sequentially through the second and first adsorbent zones.
Inventors
- 👤 Leonard James Hvizdos
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 03:08
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0462; C; C01; C01B; C01B3/00; C01B3/50; C01B3/56; C07; C07C; C07C7/00; C07C7/12; F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04151; F25J3/04157; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2256/00; B01D2256/16; B01D2256/24; B01D2256/245; B01D2257/00; B01D2257/50; B01D2257/504; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40043; B01D2259/4005; B01D2259/40056; B01D2259/40077; B01D2259/40081; B01D2259/40083; B01D2259/40088; B01D2259/4009; B01D2259/402; B01D2259/414; B01D2259/4141; B01D2259/4145; B01D2259/416; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/043; C01B2203/0465; C01B2203/0475; C01B2203/0495; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
A method for the regeneration of adsorbents used in the adsorption of water and carbon dioxide contaminants from a feed gas stream passed sequentially through first and second adsorbent zones containing adsorbent wherein the water is adsorbed in the first adsorbent zone and carbon dioxide is adsorbed in the second adsorbent zone, characterized in that it comprises: (a) introducing a heated regeneration gas stream intermediate the first and second adsorbent zones, and passing the heated regeneration gas through the first adsorbent zone in a direction countercurrent to the flow of the feed gas stream therethrough; and subsequently (b) passing cool regeneration gas sequentially through the second and first adsorbent zones in a direction countercurrent to the flow of the feed gas stream therethrough.
Claim 2
Independent Claim
123 words
A method for the regeneration of adsorbents used in the adsorption of water and carbon dioxide contaminants from a feed gas stream passed sequentially through first and second adsorbent zones containing adsorbent wherein the water is adsorbed in the first adsorbent zone and carbon dioxide is adsorbed in the second adsorbent zone, characterized in that it comprises: (a) introducing a heated regeneration gas stream intermediate the first and second adsorbent zones, and passing the heated regeneration gas through the first adsorbent zone in a direction countercurrent to the flow of the feed gas stream therethrough; and subsequently (b) passing cool regeneration gas sequentially through the second and first adsorbent zones in a direction countercurrent to the flow of the feed gas stream therethrough.
Claim 3
Dependent Claim
43 words
A method according to Claim 1, wherein the adsorption has been carried on at a high pressure level, characterized in that it further comprising the step of depressurizing the first and second adsorbent zones through the first adsorbent zone prior to step (a).
Claim 4
Dependent Claim
25 words
A method according to Claim 1 or 2, characterized in that said heated regeneration gas is at a temperature between 300 0 F and 450°F.
Claim 5
Dependent Claim
21 words
A method according to Claim 1, 2 or 3, characterized in that said cool regeneration gas is between 40°F and 130°F.
Claim 6
Independent Claim
193 words
A method for separating water and carbon dioxide from a feed gas stream characterized in that it comprises, in sequence: (a) passing the feed gas stream at a pressure of from 90 to 3000 psig and a temperature of from 40°F to 120°F sequentially through first and second adsorbent zones containing adsorbent, wherein substantially all of the water is adsorbed in the first adsorbent zone and carbon dioxide is adsorbed in the second adsorbent zone; (b) discontinuing the flow of the feed gas stream to the first and second adsorbent zones; (c) depressurizing the first and second adsorbent zones through the first adsorbtion zone to a regeneration pressure of between 14.7 and 100 psig; (d) introducing heated regeneration gas at a temperature between 300 0 F and 450°F intermediate the first and second adsorbent zones, and passing the heated regeneration gas through the first adsorbent zone in a direction countercurrent to the flow of the feed gas stream therethrough; and (e) passing cool regeneration gas at a temperature between 40°F and 130°F sequentially through the second and first adsorbent zones in a direction countercurrent to the flow of the feed gas stream therethrough.
Claim 7
Independent Claim
193 words
A method for separating water and carbon dioxide from a feed gas stream characterized in that it comprises, in sequence: (a) passing the feed gas stream at a pressure of from 90 to 3000 psig and a temperature of from 40°F to 120°F sequentially through first and second adsorbent zones containing adsorbent, wherein substantially all of the water is adsorbed in the first adsorbent zone and carbon dioxide is adsorbed in the second adsorbent zone; (b) discontinuing the flow of the feed gas stream to the first and second adsorbent zones; (c) depressurizing the first and second adsorbent zones through the first adsorbtion zone to a regeneration pressure of between 14.7 and 100 psig; (d) introducing heated regeneration gas at a temperature between 300 0 F and 450°F intermediate the first and second adsorbent zones, and passing the heated regeneration gas through the first adsorbent zone in a direction countercurrent to the flow of the feed gas stream therethrough; and (e) passing cool regeneration gas at a temperature between 40°F and 130°F sequentially through the second and first adsorbent zones in a direction countercurrent to the flow of the feed gas stream therethrough.
Claim 8
Independent Claim
58 words
A method according to any preceding Claim, characterized in that during the step of introducing a heated regeneration gas intermediate the first and second adsorbent zones, sufficient cool regeneration gas is passed through the second adsorbent zone in the direction of the first adsorbent zone to inhibit passage of the heated regeneration gas through the second adsorbent zone.
Claim 9
Independent Claim
15 words
A method according to to any preceding Claim, wherein said feed gas stream is air.
Claim 10
Independent Claim
23 words
A method according to any of Claims 1 to 6, wherein the major component of said feed gas stream is hydrogen or methane.
References Cited (Backward Citations)
No citation records indexed.
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