This paper presents preliminary simulation results from the performance analysis of the integrated systems of calcium oxide (CaO)-carbon dioxide (CO2) capture unit and solid oxide fuel cell (SOFC). The CO2 was extracted for further sequestration in the CaO-CO2 capture unit. Three configurations of the integrated systems (CaO-Before-SOFC: CBS, CaO-After-SOFC: CAS and CaO-After-Burner: CAB) were considered. It was found that the CO2 capture efficiency (E-c) is dependent on CaO fresh feed rate (F-0) and CaO recycle rate (F-R). The improvement of SOFC performance was only realized for the CBS system. The SOFC performance increases with increasing CO2 E-c. The preliminary economic analysis was carried out considering total additional cost per mole of CO2 captured. At a low percentage of CO2 capture (<42.5%), the CBS system is the most suitable configuration while the CAS system becomes an attractive choice at higher values. However, only the CAB system could be possible at a very high range of CO2 capture (>94%). (C) 2008 Elsevier B.V. All rights reserved.