Method for compressing carbon dioxide or a gas which has similar properties

• US 8,512,440 B2
• Filed: 10/29/2008
• Issued: 08/20/2013
• Est. Priority Date: 02/25/2008
• Status: Active Grant

• Current Assignee: Siemens Energy Global GmbH & Co. KG (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Schlter, Lars, Mnk, Thomas, Nlke, Marcus
• Primary Examiner(s): Hopkins, Robert A
• Application Number:
  US12/918,493
• Publication Number:
  US 20110041686A1
• Time in Patent Office: 1,756 Days
• Field of Search: 95/39, 626/13, 626/19, 60/395
• US Class Current: 95/39
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: C01B 32/50 Carbon dioxide
• CPC Class Codes: F25J 2230/80 the fluid being carbon dioxide
• CPC Class Codes: F25J 2235/80 the fluid being carbon dioxide
• CPC Class Codes: F25J 3/0266 separation of carbon dioxide production of carbon dioxide in general C01B32/00

Abstract

A method is provided where carbon dioxide is compressed in a multi-stage geared compressor using a substantially isothermic process to a pressure which lies above the pressure of the critical point of carbon dioxide. The carbon dioxide is subsequently cooled to ambient temperature in a cooling device and then compressed to a predefined final pressure in a pump device.

Claims

1. A method for compressing carbon dioxide, comprising:

compressing an initially gaseous carbon dioxide in a compressor using an essentially isothermal process to a first pressure which lies above a second pressure of the critical point of carbon dioxide;

cooling the carbon dioxide in a cooling device to a first temperature below a second temperature of the critical point, in order to achieve a first density which is close to a second density of a typical liquid; and

compressing the carbon dioxide in a pumping device to a predetermined discharge pressure.

2. The method for compressing carbon dioxide as claimed in claim 1, wherein in order to achieve the discharge pressure, both a turbocompressor and a pumping device are used.