Patent ID: 8512660
Filing Date: 2013-08-20
Classification: B01D,C12M,Y02C,Y02P

Abstract:
1. A method for the absorptive removal of carbon dioxide from biogas comprising using a scrubbing liquid in which carbon dioxide is chemically bound, wherein the scrubbing solution, for absorption, is passed in counterflow with the fed biogas through an absorber unit ( 1 ) and the loaded scrubbing liquid that is withdrawn is regenerated by desorption, which comprises heating the loaded scrubbing liquid occurring after the absorption to a temperature at which liberation of CO 2 begins, and immediately thereafter feeding the loaded scrubbing liquid to at least one centrifugal separator ( 11 ) for separating off the gas phase from the liquid phase, wherein methane and dissolved fractions of CO 2 escape via the gas phase, and after separation is complete, passing the gas phase into the absorber unit ( 1 ) and heating the liquid phase further to the temperature necessary for desorption, and feeding it to the desorption unit ( 16 ) for regeneration.