Techno-Economic Assessment of Calcium Looping for Thermochemical Energy Storage with CO2 Capture

The cyclic carbonation-calcination of CaCO3 in fluidized bed reactors not only offers a possibility for CO2 capture but can at the same time be implemented thermochemical energy storage (TCES), feature which will play an important role future that has increasing share non-dispatchable variable electricity generation (e.g., from wind and solar power). This paper provides techno-economic assessment industrial-scale calcium looping (CaL) process with simultaneous TCES capture. is assumed to make profit by selling dispatchable providing services certain nearby emitter (i.e., transport are accounted). Thus, connected two other facilities located nearby: renewable source charges plant its flue gas flow captured while discharging producing electricity. process, long-term ambient temperature without any significant loss, herein sized given daily input under boundary conditions, mandate charging section runs steadily one 12-h period per day provide steady output during 24 h day. Intercoupled mass balances computed different elements, followed sizing main equipment, after economics through cost functions widely used validated literature. economic viability assessed breakeven price (BESP), payback (PBP), as ton captured. excluded study, although potential impact on costs if included system assessed. sensitivities parameters also results show most realistic projections, BESP ranges 141 −20 $/MWh sizes lifetime 20 years. When carbon facility, it yields 45 −27 $/tCO2-captured. investment accounts capital expenses, increase degree conversion carbonator identified technical goal major importance reducing global cost.