Gas-Adsorption Processes: State of the Art

Keller, George E.

doi:10.1021/bk-1983-0223.ch008

Cited by 32 publications

(15 citation statements)

References 4 publications

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“…This research dealt with bulk separation [separation of gases containing over 10% by weight of adsorbate according to Keller's (1983) definition] where strongly-and weakly-adsorbed components were both wanted products. Fifteen experiments were performed to separate a feed mixture of 50/50 (by volume) Hz and C H I into two high-concentration products.…”

Section: Resultsmentioning

confidence: 99%

“…PSA has attracted increasing interest more recently because of its low energy requirements as well as low capital investment costs (Stewart and Heck, 1969). State-of-the-art reviews of the PSA processes may be found in Keller (1983), Cassidy and Holmes (1984), and Wankat (1981). In modern PSA processes, three or more beds are used to synchronize and accommodate two additional steps to those in the Skarstrom cycle: cocurrent depressurization and pressure equalization.…”

Section: Conclusion and Significancementioning

confidence: 99%

“…The two major applications of PSA have been air drying and hydrogen purification. Other commercial applications are oxygen or nitrogen (but not both in the same process) production from air, octane improvement (using Union Carbide ISOSIV Process), and solvent recovery (Cassidy and Holmes, 1984;Keller, 1983). A variation of PSA, first described by Turnock and Kadlec (1971), and Kowler and Kadlec (1972), involves a one-column process driven by a square feed pressure variation applied to one end of the column, with slow withdrawal of a product stream from the opposite end.…”

Section: Conclusion and Significancementioning

confidence: 99%

“…Multicomponent, bulk gas separation, i.e., for gases containing high concentrations of adsorbates (more than 10 wt % according to Keller, 1983), is in its infancy from the point of view of both commercial application and theoretical understanding. However, its potential applications are imminent and important.…”

Section: Conclusion and Significancementioning

confidence: 99%

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Gas separation by pressure swing adsorption: A pore‐diffusion model for bulk separation

Yang¹,

Doong²

1985

AIChE Journal

146

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An experimental and theoretical study is performed for bulk separation of gas mixture by pressure swing adsorption, a process widely used commercially for gas purification. By cycling the pressure of a bed of activated carbon between 3 and up to 500 psig (0.021 to 3.445 MPa), at the ambient temperature, a 50/50 H2/CH4 mixture is separated into two products with well over 90% purity and recovery at high throughputs. All process characteristics can be predicted by a pore‐diffusion model. A fundamental understanding of the function of each step in the cyclic process is given.

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Section: Resultsmentioning

confidence: 99%

Section: Conclusion and Significancementioning

confidence: 99%

Section: Conclusion and Significancementioning

confidence: 99%

Section: Conclusion and Significancementioning

confidence: 99%

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Gas separation by pressure swing adsorption: A pore‐diffusion model for bulk separation

Yang¹,

Doong²

1985

AIChE Journal

146

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“…The advent of commercial PSA operations started with the early patents but its first application was offered later 20 . Since then, PSA has become the state-of-the-art separation technology for large variety of applications like air fractionation and hydrogen production [21][22][23][24] . The PSA processes are much more efficient in separation and are also associated to low energy consumption when compared to other technologies because only stepped changes in pressure are required 25 .…”

Section: Introductionmentioning

confidence: 99%

Pressure Swing Adsorption Based Air Filtration/Purification Systems for NBC Collective Protection

Singh

Boopathi

et al. 2016

Def. Life. Sc. Jl.

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The respiratory protection against chemical warfare agents (CWA) has become a worldwide security concern in light of the many recent international threats utilising CWA. Till date the carbon filtration was adequate to protect the soldiers from the threats of CWA. With the advent of further advancements in the CWA a new threat is looming large that is known as the carbon breakers. pressure swing adsorption (PSA) is a well-established gas separation technique in air separation, gas drying, and hydrogen purification separation. Recently, PSA technology has been applied in the area of chem-bio defence by virtue of its unique advantages. This article reviews recent advances and developments in the field of PSA based purification, separation, and its use in defense sector. This emerging and advanced PSA technology can provide regenerative nuclear, biological and chemical (NBC) collective protection for ground vehicles, aircraft, ships and shelters. This PSA technology challenges threat scenario developed which includes nerve, blood and blister agents, as well as a "carbon breaker" agent, and proved that this technology will be a viable concept for future NBC collective protection systems. New technological breakthroughs and greater sophistication of PSA technologies will transform the collective protection based PSA technology in real field sense, addressing the escalating threat of CWA. We conclude this review with future prospects and challenges associated with PSA technology.

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Adsorption, Gas Separation

Sherman¹,

Yon²

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Gas‐phase adsorption is widely employed for the large‐scale purification or bulk separation of air, natural gas, chemicals, and petrochemicals. An adsorbent attracts molecules from the gas, and the molecules become concentrated on the surface of the adsorbent and are removed from the gas phase. Most commercial adsorbents for gas‐phase applications are employed in the form of pellets, beads, or other granular shapes, most commonly packed into fixed beds through which the gaseous feed mixtures are passed. The growth in both variety and scale of gas‐phase adsorption separation processes, particularly since 1970, is due in part to continuing discoveries of new porous, high surface‐area adsorbent materials (particularly molecular sieve zeolites) and to improvements in the design and modification of adsorbents. To permit the recovery of pure products and to extend the adsorbent's useful life, adsorbents should generally be inert and not react with or catalyze reactions of adsorbate molecules. Commercially useful adsorbents can be classified by the nature of their structure (amorphous or crystalline), by the sizes of their pores, by the nature of their surfaces (polar, nonpolar, or intermediate), or by their chemical composition, of which the size of the pores is the most important initial consideration. Adsorption processes are temperature‐swing adsorption (TSA) and pressure‐swing (PSA) as well as purge‐swing cycles and nonregenerative approaches. Most adsorption processes use fixed beds, but some use moving or fluidized beds.

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Gas-Adsorption Processes: State of the Art

Cited by 32 publications

References 4 publications

Gas separation by pressure swing adsorption: A pore‐diffusion model for bulk separation

Gas separation by pressure swing adsorption: A pore‐diffusion model for bulk separation

Pressure Swing Adsorption Based Air Filtration/Purification Systems for NBC Collective Protection

Adsorption, Gas Separation

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