[특허]Adsorption process and system using multilayer adsorbent beds

Praxair Technology, Inc. (Danbury CT 02)

Adsorption process and system using multilayer adsorbent beds

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/047
출원번호	US-0546325 (1995-10-20)
발명자 / 주소	Notaro Frank (Amherst NY) Mullhaupt Joseph Timothy (Williamsville NY) Leavitt Frederick Wells (Amherst NY) Ackley Mark William (East Aurora NY)
출원인 / 주소	Praxair Technology, Inc. (Danbury CT 02)
인용정보	피인용 횟수 : 40 인용 특허 : 14

초록 ▼

An adsorption process and system for the selective adsorption of a more readily adsorbable component, such as nitrogen, as from air or other feed gas mixture is carried out using a composite adsorbent bed containing different adsorbent materials positioned in separate zones in which the temperature conditions favor adsorption performance of the particular adsorbent material under applicable processing conditions in each zone. A method for the selection of the adsorbent materials is based on Adsorption Figure of Merit values.

대표청구항 ▼

In a pressure swing adsorption process for the separation of a more selectively adsorbable component from a feed mixture containing a less selectively adsorbable component, wherein the feed mixture in the vapor phase is contacted in a fixed adsorbent bed containing adsorbent material selective for the adsorption of the more selectively adsorbable component by means of the cyclic steps comprising; (a) adsorption, during which the feed mixture is passed into the bed in contact with the adsorbent at an upper adsorption pressure and the more selectively adsorbarble component of the feed gas mixture is selectively adsorbed and the less selectively adsorbable component thereof is recovered from the discharge end of the bed; and (b) depressurization, during which the passage of the feed mixture into the bed is discontinued and the pressure in the bed is reduced from the upper adsorption pressure to a lower desorption pressure to desorb and recover the more selectively adsorbable component from the bed; the cyclic operation of steps (a) and (b) producing thermal gradients within said fixed adsorption bed, the improvement in which the feed mixture is contacted with said fixed adsorbent bed wherein said fixed adsorbent bed comprises a composite bed containing at least two different adsorbent materials selective for the adsorption of the more selectively adsorbable component, each of which is confined to a zone within the bed in which the temperature and process conditions favor the performance of that adsorbent as measured by its Adsorption Figure of Merit value under particular process conditions applicable to said zone, wherein the Adsorption Figure of Merit is defined as: AFM=D2aA(aA/aD), wherein: D2=LNA-LND is delta nitrogen loading; LNA is nitrogen loading at adsorption conditions; LND is nitrogen loading at desorption conditions; [Figure] where aA is selectivity at adsorption conditions; LOA is oxygen loading at adsorption conditions; YNA is the gas phase mole fraction of nitrogen at adsorption conditions; and [Figure] where aD is selectivity at desorption conditions LOD is oxygen loading at desorption conditions and; YND is the gas mole of nitrogen at desorption conditions.

이 특허에 인용된 특허 (14)

Toussaint Lee J. (Lockport NY), Adsorbent beds for pressure swing adsorption operations.
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Collins John Joseph (Katonah NY), Air separation by adsorption.
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Leavitt Frederick W. (North Tonawanda NY), Air separation pressure swing adsorption process.
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Chao Chien-Chung (Millwood NY), Air separation process.
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Sircar, Shivaji; Conrad, Roger R.; Ambs, William J., Binary ion exchanged type X zeolite adsorbent.
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Garrett Michael E. (Woking GB2) Gardner John B. (Reigate GB2), Gas separation method and apparatus.
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White ; Jr. Donald H. (923 Alfred La. Homer NY 13077), Heaterless adsorption system for combined purification and fractionation of air.
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Leavitt Frederick W. (North Tonawanda NY), Low temperature pressure swing adsorption with refrigeration.
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Chao Chien C. (Millwood NY) Sherman John D. (Chappagua NY) Mullhaupt Joseph T. (Willimasville NY) Bolinger Cornelius M. (Sugarland TX), Mixed ion-exchanged zeolites and processes for the use thereof in gas separations.
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Watson Charles F. (Orefield PA) Whitley Roger D. (Allentown PA) Meyer Michael L. (Fogelsville PA), Multiple zeolite adsorbent layers in oxygen separation.
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Kirner John F. (Orefield PA), Nitrogen adsorption with highly Li exchanged X-zeolites with low Si/Al ratio.
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Gaffney Thomas R. (Allentown PA) Kirner John F. (Orefield PA) Kumar Ravi (Allentown PA) Maliszewskyj Robin J. (Hatfield PA) Schmidt William P. (Allentown PA), O₂ VSA process with low O₂ capacity adsorbents.
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Coe Charles G. (Macungie PA) Kuznicki Steven M. (Allentown PA), Polyvalent ion exchanged adsorbent for air separation.
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Chao Chien C. (Millwood NY), Process for separating nitrogen from mixtures thereof with less polar substances.
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Belanger, Paul W.; Baksh, Mohamed Safdar Allie; Chandra, Preeti; Rosinski, Andrew C., Adsorption control method and controller.
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Deng Shuguang ; Kumar Ravi ; Bulow Martin ; Fitch Frank R. ; Ojo Adeola Florence ; Gittleman Craig S., Air purification process.
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Jain, Ravi; LaCava, Alberto I.; Maheshwary, Apurva; Ambriano, John Robert; Acharya, Divyanshu R.; Fitch, Frank R., Air separation using monolith adsorbent bed.
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Baksh,Mohamed Safdar Allie; Rosinski,Andrew C., Continuous feed three-bed pressure swing adsorption system.
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Neary,David Lloyd, Gas separation vessel apparatus.
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Dee, Douglas Paul; Chiang, Robert Ling; Miller, Edwin John; Whitley, Roger Dean, High purity oxygen production by pressure swing adsorption.
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Ji Wenchang ; Shen Dongmin ; Jain Ravi ; Shirley Arthur I. ; Athalye Atul M. ; Sadkowski Piotr J., Method of processing semiconductor manufacturing exhaust gases.
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Siew-Wah, Chai; Sircar, Shivaji; Kothare, Mayuresh V., Miniature oxygen concentrators and methods.
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Rode Edward J. ; Tsybulevskiy Albert M., Molecular sieve adsorbent for gas purification and preparation thereof.
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Rode, Edward J.; Tsybulevskiy, Albert M., Molecular sieve adsorbent for gas purification and preparation thereof.
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Ackley Mark William, Multilayer adsorbent beds for PSA gas separation.
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Golden, Catherine Marie Anne; Golden, Timothy Christopher; Battavio, Paula Jean, Multilayered adsorbent system for gas separations by pressure swing adsorption.
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Joseph Timothy Mullhaupt ; Frank Notaro, VPSA process using adsorbent materials.
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Adsorption process and system using multilayer adsorbent beds

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