Title:
高圧天然ガス中の高濃度炭酸ガスを除去する方法
Document Type and Number:
Japanese Patent JP3626796
Kind Code:
B2
Abstract:
This invention relates to a process for removing highly concentrated CO2 from high-pressure natural gas and recovering it in a high-pressure state. This process comprises the absorption step of bringing high-pressure natural gas having a CO2 partial pressure of 2 kg/cm<2> or greater and a pressure of 30 kg/cm<2> or greater into gas-liquid contact with a regenerated CO2-lean absorbing fluid comprising a CO2 absorbing fluid of which the difference in saturated CO2 absorption level between 40 DEG C and 120 DEG C is not less than 30 Nm<3> per ton of solvent at a CO2 partial pressure of 2 kg/cm<2>, whereby highly concentrated CO2 present in the high-pressure natural gas is absorbed into the CO2-lean absorbing fluid to produce refined natural gas having a reduced CO2 content and a CO2-rich absorbing fluid; and the regeneration step of heating the CO2-rich absorbing fluid without depressurizing it, whereby high-pressure CO2 having a pressure of 10 kg/cm<2> or greater is liberated and a CO2-lean absorbing fluid is regenerated and recycled for use in the absorption step.
Inventors:
Masaki Iijima
Kaoru Mitsuoka
Kaoru Mitsuoka
Application Number:
JP25617495A
Publication Date:
March 09, 2005
Filing Date:
October 03, 1995
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
B01D53/62; C10L3/10; (IPC1-7): C10L3/10; B01D53/62
Domestic Patent References:
| JP60220121A |
Attorney, Agent or Firm:
Ryoichi Hagiwara
Atsushi Anzai
Atsushi Anzai