A new pressure swing adsorption process for high enrichment and recovery

Suh, Sung-Sup; Wankat, Phillip C.

doi:10.1016/0009-2509(89)85033-x

Cited by 14 publications

(6 citation statements)

References 4 publications

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“…It has been pointed out earlier that a purge step with the strongly adsorbed component can be employed after the adsorption step and result in a significant increase of the purity of that species in the product (Tamura, 1970;Sircar and Zondlo, 1977;Cen and Yang, 1986;Baksh et al, 1990; Suh and Wankat, 1989). In all previous cases the separations were equilibrium controlled and the diffusional resistances were negligible.…”

Section: Introductionmentioning

confidence: 97%

Concentration and recovery of carbon dioxide from flue gas by pressure swing adsorption

Kikkinides¹,

Yang²,

Cho³

1993

Ind. Eng. Chem. Res.

357

231

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Section: Introductionmentioning

confidence: 97%

Concentration and recovery of carbon dioxide from flue gas by pressure swing adsorption

Kikkinides¹,

Yang²,

Cho³

1993

Ind. Eng. Chem. Res.

357

231

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“…This allows for a higher overall purity of the heavy component in the heavy product stream (Kratz et al, 1988). However, a paucity of studies have been carried out on the heavy reflux concept (Cen and Yang, 1986;Suh and Wankat, 1989;Baksh et al, 1990;Sikavitsas et al, 1995;Na et al, 2002;Olajossy et al, 2003), compared to those disclosing features of the more conventional light reflux concept (Ruthven et al, 1994). Moreover, very few of these studies have emphasized the fact that when the light reflux step is used in conjunction with the heavy reflux step in a PSA cycle configuration, in effect, a dual reflux PSA cycle has been devised.…”

Section: Introductionmentioning

confidence: 99%

Radically New Adsorption Cycles for Carbon Dioxide Sequestration

Ritter¹,

Ebner²,

McIntyre³

et al. 2005

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In Parts I and II of this project, a rigorous pressure swing adsorption (PSA) process simulator was used to study new, high temperature, PSA cycles, based on the use of a Kpromoted HTlc adsorbent and 4-and 5-step (bed) vacuum swing PSA cycles, which were designed to process a typical stack gas effluent at 575 K containing (in vol%) 15 % CO 2 , 75% N 2 and 10% H 2 O into a light product stream depleted of CO 2 and a heavy product stream enriched in CO 2 . Literally, thousands (2,850) of simulations were carried out to the periodic state to study the effects of the light product purge to feed ratio (γ), cycle step time (t s ) or cycle time (t c ), high to low pressure ratio (π T ), and heavy product recycle ratio (R R ) on the process performance, while changing the cycle configuration from 4-to 5-step (bed) designs utilizing combinations of light and heavy reflux steps, two different depressurization modes, and two sets of CO 2 -HTlc mass transfer coefficients. The process performance was judged in terms of the CO 2 purity and recovery, and the feed throughput.The best process performance was obtained from a 5-step (bed) stripping PSA cycle with a light reflux step and a heavy reflux step (with the heavy reflux gas obtained from the low pressure purge step), with a CO 2 purity of 78.9%, a CO 2 recovery of 57.4%, and a throughput of 11.5 L STP/hr/kg. This performance improved substantially when the CO 2 -HTlc adsorption and desorption mass transfer coefficients (uncertain quantities at this time) were increased by factors of five, with a CO 2 purity of 90.3%, a CO 2 recovery of 73.6%, and a throughput of 34.6 L STP/hr/kg. Overall, this preliminary study disclosed the importance of cycle configuration through the heavy and dual reflux concepts, and the importance of knowing well defined mass transfer coefficients to the performance of a high temperature PSA process for CO 2 capture and concentration from flue and stack gases using an HTlc adsorbent. This study is continuing.

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“…PSA separation processes. Suh and Wankat 1989b proposed a new PSA process that employs an inert column between two adsorbent columns for compression and recycling of the strongly adsorbed component streams using the weakly adsorbed component stream. Their equilibrium theory analysis showed that a much higher enrichment of the heavy component can be achieved, depending on the ratio of the volumes of the inert and adsorption columns, the pressure ratio, and Ž .…”

Section: Introductionmentioning

confidence: 99%