[특허]Selective-permeation gas-separation process and apparatus

Selective-permeation gas-separation process and apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/22
출원번호	US-0738793 (1985-05-28)
발명자 / 주소	Sirkar Kamalesh K. (Scotch Plains NJ)
출원인 / 주소	The Trustees of the Stevens Institute of Technology (Hoboken NJ 02)
인용정보	피인용 횟수 : 44 인용 특허 : 0

초록 ▼

A permeant gas is selectively transferred from a feed-gas mixture which comprises the permeant gas and at least one other component to an output fluid by the process of the invention. The process involves introducing a selective-permeation liquid into a permeation-transfer chamber. A gas-depletion channel and a gas-enrichment channel pass through the permeation chamber and are separated from the chamber respectively by porous walls. The selective-permeation liquid contacts the porous walls but does not flow into the gas-depletion or gas-enrichment channels. The feed-gas mixture is introduced into the gas-depletion channel so that permeant gas in the mixture can pass through the pores of the walls of the channel into the selective-permeation liquid and from the selective-permeation liquid through the pores of the walls of the gas-enrichment channel into the gas-enrichment channel. Permeant gas is withdrawn from the gas-enrichment channel and a stream of gas depleted in the permeant gas is withdrawn from the gas-depletion channel. A gas-transfer unit permits the process of the invention to be carried out effectively.

대표청구항 ▼

A process for separating a permeant gas from a feed-gas mixture, the feed-gas mixture comprising the permeant gas and at least one other gaseous component, the process comprising the steps of: (a) introducing a selective-permeation liquid into a permeation-transfer chamber, the selective-permeation liquid being selectively permeable to the permeant gas relative to the other component of the feed-gas mixture, a gas-depletion channel extending through the permeation-transfer chamber, the gas-depletion channel being separated from the permeation-transfer chamber by a gas-depletion porous wall, a gas-enrichment channel extending through the permeation-transfer chamber disjoint from the gas-depletion channel, the gas-enrichment channel being separated from the permeation-transfer chamber by a gas-enrichment porous wall, the gas-depletion and gas enrichment porous walls being in close proximity to one another, the gas-enrichment channel and the gas-depletion channel together defining gas-transfer channels, regions adjacent to the porous walls of the gas-transfer channels and exterior of the channels within the permeation-transfer chamber constituting open passages to permit a substantially free liquid passage of the selective-permeation liquid so that surfaces of the porous walls of the gas-transfer channels are contacted by the selective-permeation liquid in the permeation-transfer chamber; (b) introducing a stream of the feed-gas mixture into the gas-depletion channel and allowing the feed-gas mixture to flow through the channel in the permeation-transfer chamber so that permeant gas in the feed gas mixture can pass through the pores of the walls of the gas-depletion channel into the selective permeation liquid in the permeation-transfer chamber and from the selective-permeation liquid through the pores of the walls of the gas-enrichment channel into the gas-enrichment channel; (c) maintaining a difference between the pressure of the selective-permeation liquid in the permeation-transfer chamber and the pressure of the gas in the gas-depletion channel at a value which substantially prevents the selective permeation liquid from flowing through the gas-depletion porous wall into the gas-depletion channel and substantially prevents gas in the gas-depletion channel from flowing through the gas-depletion porous wall into the permeation-transfer chamber; (d) maintaining a difference between the pressure of the selective permeation liquid in the permeation-transfer chamber and the pressure of the fluid in the gas-enrichment channel at a value which substantially prevents the selective-permeation liquid from flowing through the gas-enrichment porous wall into the gas-enrichment channel and substantially prevents fluid in the gas-enrichment channel from flowing through the gas-enrichment porous wall into the permeation-transfer chamber; (e) withdrawing permeant gas from the gas-enrichment channel; and (f) withdrawing a stream of gas depleted in the permeant gas from the gas-depletion channel. A gas-transfer unit for selectively transferring a permeant gas from a feed-gas mixture comprising the permeant gas and at least one other component to an output fluid, the gas-transfer unit comprising: (a) a fluid-tight housing, an interior of the housing defining a gas-transfer chamber, the housing having a feed-gas input port, a depleted-gas output port, a sweep-fluid input port, an enriched-gas output port and a selective-permeation liquid inlet port, the five ports providing communication with the gas-transfer chamber; (b) gas-depletion porous-wall means located within the gas-transfer chamber for forming at least a portion of a wall of a gas-depletion channel which passes through the gas-transfer chamber, the gas-depletion channel connecting the feed-gas input port to the depleted-gas output port; (c) gas-enrichment porous-wall means located within the gas-transfer chamber for forming at least a portion of a wall of a gas-enrichment channel which passes through the gas-transfer chamber, the gas-enrichment channel connecting the sweep-fluid input port to the enriched-gas output port, the gas-enrichment channel being disjoint from the gas-depletion channel, a region within the gas-transfer chamber and outside of the gas-enrichment channel and the gas-depletion channel defining a selective-permeation chamber, the selective-permeation-liquid inlet port providing communication with the selective-permeation chamber, the selective-permeation chamber including open passages adjacent to the gas-depletion porous-wall means and the gas-enrichment porous-wall means to permit a substantially free liquid passage of a preselected selective-permeation liquid introduced into the selective-permeation chamber through the selective-permeation-liquid inlet port to contact the gas-depletion porous-wall means and the gas-enrichment porous-wall means, the gas-depletion porous-wall means and the gas-enrichment porous-wall means being made of a material which tends to prevent the selective-permeation liquid in the selective-permeation chamber from flowing into the gas-depletion channel and into the gas-enrichment channel, so that a selective-permeation liquid can be confined in the selective-permeation chamber to facilitate the selective transfer of the permeant gas from the gas-depletion channel to the gas-enrichment channel of the gas-transfer unit.

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