If my understanding is correct, you are referring to post-combustion capture. Certain materials help absorb carbon dioxide and then release it. However, the technology you are referring to is used in the pulp and paper industry, that is on a much smaller scale than what is being studied here. Very large vessels are needed to modernize a conventional plant, such as the one in Nanticoke.
On May 14th, 2007. See this statement in context.