Werner Robert G. (Danbury CT) Fay Homer (Snyder NY)
출원인 / 주소
Union Carbide Corporation (Danbury CT 02)
인용정보
피인용 횟수 :
24인용 특허 :
9
초록▼
A feed gas is passed to a pressure swing adsorption system, each bed of which undergoes a processing cycle that includes (1) pressurization (2) copurge at upper adsorption pressure, (3) countercurrent depressurization, including, in some embodiments, evacuation to a lower subatmospheric desorption p
A feed gas is passed to a pressure swing adsorption system, each bed of which undergoes a processing cycle that includes (1) pressurization (2) copurge at upper adsorption pressure, (3) countercurrent depressurization, including, in some embodiments, evacuation to a lower subatmospheric desorption pressure. By recycling effluent gas released upon copurge and countercurrent depressurization for use in the pressurization or the copurge step, the more readily adsorbable component of the feed gas is advantageously recovered at high purity and at high recovery levels. Enriched less readily adsorbable component is also recoverable as coproduct effluent at relatively high recovery levels. The process can be advantageously employed for the separation and recovery of product nitrogen from air.
대표청구항▼
An adiabatic pressure swing adsorption process for the selective adsorption of nitrogen from air, and the recovery of high purity nitrogen product, in an adsorption system having at least two adsorbent beds, each of which undergoes, on a cyclic basis, a processing sequence comprising: (a) introducin
An adiabatic pressure swing adsorption process for the selective adsorption of nitrogen from air, and the recovery of high purity nitrogen product, in an adsorption system having at least two adsorbent beds, each of which undergoes, on a cyclic basis, a processing sequence comprising: (a) introducing coproduct effluent gas withdrawn from the discharge end of another bed in the system to the discharge end of said bed, before and/or simultaneously with the passage of feed to the feed end of the bed, thereby increasing the pressure of the bed from a subatmospheric desorption pressure to an intermediate pressure level; (b) passing feed air to the feed end of said bed, with or without the passage of coproduct effluent to the discharge end thereof, for use in increasing the pressure thereof from said intermediate pressure level to an upper adsorption pressure; (c) introducing nitrogen copurge gas to the feed end of the bed at said upper adsorption pressure to displace coproduct effluent gas from the discharge end of the bed, a portion of said coproduct effluent gas being introduced to the discharge end of a bed being pressurized from said desorption pressure level, the concentration of nitrogen in said coproduct effluent gas increasing during said copurge step, which is continued until the nitrogen concentration reaches a predetermined level in said coproduct effluent gas stream; (d) introducing additional nitrogen copurge gas to the feed end of the bed at said upper adsorption pressure after the nitrogen concentration reaches said predetermined level in said effluent gas stream, with the additional displaced effluent gas containing more than the said predetermined level of nitrogen concentration therein being recycled to the feed end of a bed in the system that is being repressurized from said intermediate pressure level to said upper adsorption pressure and/or to said bed at the upper pressure level; (e) countercurrently depressurizing said bed from the upper adsorption pressure to a lower pressure with discharge of a nitrogen-rich gas from the feed end of the bed, said discharged nitrogen-rich gas comprising nitrogen copurge gas and/or nitrogen product gas; (f) further countercurrently depressurizing said bed by evacuation from said lower pressure to subatmospheric desorption pressure with discharge of desorbed, high purity gas comprising nitrogen product gas and/or copurge gas from the feed end of the bed, and (g) repeating steps (a)-(f) on a cyclic basis with additional feed air being passed to the bed being repressurized during step (b) or during steps (a) and (b), whereby product nitrogen can be readily obtained at high purity and recovery levels, and an oxygen-enriched coproduct can also be obtained at relatively high recovery levels.
Stoner Glenn (Calhan CO) Reingold ; III Herbert E. (Annapolis MD) D\Amico Joseph S. (Linthicum MD) Knaebel Kent S. (Plain City OH), Enhanced helium recovery.
Te Braake, Justus Theodorus Gerardus; Bracht, Maarten; Bungku, Desmond Andrew; Van De Graaf, Wouter David; Linders, Xander; Sadasivan Vijayakumari, Sivakumar, Method for processing fischer-tropsch off-gas.
Verrando Marcel G. (Ocala FL) White Donald H. (Homer NY) Koslow Evan E. (Westport CT) Barkley Phillip G. (Cortland NY), Pressure-swing adsorption system and method for NBC collective protection.
Doong Shain-Jer ; Shuttleworth Andrew William ; Ambriano John R. ; Maheshwary Apurva ; Travis Ian Douglas, Single vessel gas adsorption system and process.
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