Patent ID: 8383072
Filing Date: 2013-02-26
Classification: B01D,B01J,Y02A,Y02C

Abstract:
1. A process for separating CO 2 from a first gas stream comprising CO 2 , the process comprising the steps of: (a) calcining an alkaline earth metal carbonate to generate an alkaline earth metal oxide and produce a first product gas stream comprising CO (b) contacting the alkaline earth metal oxide with the first gas stream to carbonate the alkaline earth metal oxide and regenerate the alkaline earth metal carbonate; (c) calcining the alkaline earth metal carbonate regenerated in step (b) to regenerate the alkaline earth metal oxide and produce a second product gas stream comprising CO (d) optionally repeating steps (b) and (c) using the alkaline earth metal oxide regenerated in step (c); (e) contacting the alkaline earth metal oxide regenerated in step (c) with water to form an alkaline earth metal hydroxide; (f) heating the alkaline earth metal hydroxide in a second gas stream comprising CO (g) dehydrating the alkaline earth metal hydroxide to regenerate the alkaline earth metal oxide; (h) optionally repeating steps (e) to (g) using the alkaline earth metal oxide regenerated in step (g); (i) contacting the alkaline earth metal oxide regenerated in step (g) with a third gas stream comprising CO (j) optionally repeating steps (c) to (i) using the alkaline earth metal carbonate regenerated in step (i); and (k) repeating steps (a) to (c), (e) to (g), and (i), and one or more of steps (d), (h), and (j) when performed, using the alkaline earth metal carbonate regenerated in step (i).