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Method and apparatus for separating gases

A technology of gas and gas mixture, which is applied in the direction of separation method, manufacture of combustible gas, separation of dispersed particles, etc.

Active Publication Date: 2012-04-18
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the various steps involved in removing carbon dioxide from a synthesis gas stream including capturing the gas, pressurizing, and transporting to storage sites, pressurization can account for more than 50% of the process costs

Method used

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  • Method and apparatus for separating gases
  • Method and apparatus for separating gases
  • Method and apparatus for separating gases

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Embodiment Construction

[0020] figure 1 Shown is a schematic diagram of a device 3 for removing gas 5 dissolved in a liquid 7 according to the method of the invention. The device 3 comprises three or more expansion stages 9 , 11 and 13 . Each expansion stage comprises a respective throttling device 15 , 17 and 19 and a respective expansion tank 21 , 23 and 25 . Restriction devices 15, 17 and 19 may be, for example, orifices, valves, tubes or other devices that restrict fluid flow to each respective expansion tank. As shown, fluid flow into each tank is controlled by a respective throttling device, and the tanks are connected in series with each other.

[0021] Each tank has a respective gas space 27 , 29 and 31 , in which gas 5 released from said liquid 7 can accumulate and be drawn off by means of a compressor device 33 . The compressor device may direct the gas into a pipeline for further transport, eg to isolation device 35 .

[0022] In operation, a liquid 7 containing dissolved gas 5 is conv...

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Abstract

A method and apparatus for removing carbon dioxide from a synthesis gas stream containing hydrogen is disclosed. The method includes absorbing the carbon dioxide using a physical solvent under high pressure and then liberating the carbon dioxide in a series of expansion stages where the pressure on the solvent is reduced. The expansion ratio increases with each expansion stage. The apparatus includes expansion stages having throttling devices and expansion tanks operated at increasing expansion ratios. Carbon dioxide is liberated in this manner so as to minimize the energy required compress for transport via a pipe line for sequestration of the gas. Sequestration of the carbon dioxide is preferred to atmospheric venting to curb the release of greenhouse gases.

Description

technical field [0001] The present invention relates to a method and apparatus for the separation of gases, for example, the removal of acid gases from a synthesis gas stream comprising hydrogen and originating from a partial oxidation or gasification process. Background technique [0002] In the production of hydrogen, synthesis gas containing hydrogen as well as other undesired components is produced in various processes such as reforming of methane steam, water gas shift reaction, and various solids such as coal, coke and present in Gasification of heavy liquid hydrocarbons in oil refinery waste products. Said unwanted gas components include "acid gases" such as carbon dioxide and hydrogen sulfide. [0003] Since it is advantageous to "sweeten" the synthesis gas by removing acid gases prior to further processing, various types of acid gas removal systems are used. Acid gas removal systems can use chemical or physical solvents. Acid gas removal systems using physical so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/18
CPCB01D19/0036Y02C10/14Y02C10/04Y02E20/18Y02C10/06C10K1/16C10J3/82B01D53/1475C10K3/00C10J3/00C10J2300/1603Y02C20/40Y02P20/151B01D53/1425
Inventor J·E·帕拉马拉K·B·福加什
Owner AIR PROD & CHEM INC