CaO-based sorbents for capturing CO ₂ in clean energy processes

Using CaO-based regenerative sorbents to capture CO2 in fossil fuel based power generation and H ₂ production is a promising technology for reduction of CO ₂ emission. A major challenge for this technology is the decay of sorbent activity with increasing cycles of sorption/regeneration. A method for determination of the long-term activity is proposed, which can greatly reduce the experimental work for process evaluation and sorbent development. The dependence of sorbent activity on the cycle number can be viewed as the dependence on the duration of sorbent regeneration. The residual activity of the sorbent after a large number of cycles may be determined with single calcination and carbonation test runs. This is an abstract of a paper presented at the 19th International Congress of Chemical and Process Engineering and 7th European Congress of Chemical Engineering (Prague, Czech Republic 8/28/2010-9/1/2010).