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Title:
CARBON DIOXIDE SEPARATION SYSTEM
Document Type and Number:
Japanese Patent JP2012236134
Kind Code:
A
Abstract:

To provide a carbon dioxide separation system with which it is possible to separate, with good efficiency, mixed gases having a wide range of pressures and carbon dioxide concentrations into high-concentration carbon dioxide gas and gas from which carbon dioxide has been removed.

By means of the carbon dioxide separation system, a mixed gas 1 having a carbon dioxide concentration of 3 to 75% is introduced to a primary carbon dioxide separator 4 having a zeolite membrane 5 for carbon dioxide separation and a primary permeating gas 6 having a carbon dioxide concentration of 80% or greater is produced on the permeation side of the zeolite membrane 5 while the carbon dioxide concentration of a primary gas 7 on the non-permeation side of the zeolite membrane 5 is reduced to 3 to 15%. Next, this primary gas 7 on the non-permeation side is introduced to a secondary carbon dioxide separator 8 by an amine absorption method or a pressure swing adsorption method PSA to produce a secondary separated gas 9 having a carbon dioxide concentration of 80% or greater that has been separated by the separator 8 and a gas 10 from which carbon dioxide has been removed having a carbon dioxide concentration of 2% or less. Preferably, the zeolite membrane 4 for carbon dioxide separation includes an FAU type zeolite membrane layer.


Inventors:
Sawamura, Kenichi
Takagi, Yoshinobu
Asari, Yoshihiro
Application Number:
JP2011000105880
Publication Date:
December 06, 2012
Filing Date:
May 11, 2011
Export Citation:
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Assignee:
HITACHI ZOSEN CORP
International Classes:
B01D53/22; B01D53/04; B01D53/14; B01D53/62; B01D71/02; C01B32/50; C10L3/10
Domestic Patent References:
JP2008142709A2008-06-26
JP2007307518A2007-11-29
JP2005503260A2005-02-03
JP2002201020A2002-07-16
JP2009011980A2009-01-22
Foreign References:
Other References:
JPN6015006582; Charles L. Anderson: 'Case Study: Membrane CO2 Removal from Natural GasGrissik Gas Plant, Sumatra, Indonesia' Presented at the Regional Symposium on Membrane Science and Technology, 22-24 April 2004, Johor Bahr , 2004
Attorney, Agent or Firm:
日比 紀彦
岸本 瑛之助
渡邊 彰
松村 直都