Patent ID: 7976803

Claim:
A process that removes carbon dioxide from a post combustion gas stream such as a flue gas of a power station or processing plant, the gas stream including steam and carbon dioxide, and the process including the steps of: a) extracting carbon dioxide from the gas stream by contacting the gas stream with an absorbing medium in the form of a solution; b) volatilizing carbon dioxide from the absorbing medium so as to produce a product stream rich in carbon dioxide; c) obtaining energy from the gas stream in the form of either one or a combination of i) sensible heat from the gas stream and/or ii) latent heat obtained by condensing steam and using the energy as a heat source to assist in volatilization of carbon dioxide according to step b); and wherein step a) is carried out at a pressure ranging from 100 to 150 kPa absolute and step b) is carried out at a pressure ranging from 5 to 60 kPa absolute.