Nabavi, Seyed AliErans, MaríaManovic, Vasilije2019-08-302019-08-302019-08-27Nabavi SA, Erans M, Manović V. (2019) Demonstration of a kW-scale solid oxide fuel cell-calciner for power generation and production of calcined materials. Applied Energy, Volume 255, December 2019, Article number 1137310306-2619https://doi.org/10.1016/j.apenergy.2019.113731http://dspace.lib.cranfield.ac.uk/handle/1826/14487Carbonate looping (CaL) has been shown to be less energy-intensive when compared to mature carbon capture technologies. Further reduction in the efficiency penalties can be achieved by employing a more efficient source of heat for the calcination process, instead of oxy-fuel combustion. In this study, a kW-scale solid oxide fuel cell (SOFC)-integrated calciner was designed and developed to evaluate the technical feasibility of simultaneously generating power and driving the calcination process using the high-grade heat of the anode off-gas. Such a system can be integrated with CaL systems, or employed as a negative-emission technology, where the calcines are used to capture CO2 from the atmosphere. The demonstration unit consisted of a planar SOFC stack, operating at 750 °C, and a combined afterburner/calciner to combust hydrogen slip from the anode off-gas, and thermally decompose magnesite, dolomite, and limestone. The demonstrator generated up to 2 kWel,DC power, achieved a temperature in the range of 530–550 °C at the inlet of the afterburner, and up to 678 °C in the calciner, which was sufficient to demonstrate full calcination of magnesite, and partial calcination of dolomite. However, in order to achieve the temperature required for calcination of limestone, further scale-up and heat integration are needed. These results confirmed technical feasibility of the SOFC-calciner concept for production of calcined materials either for the market or for direct air capture (DAC).enAttribution 4.0 InternationalSolid oxide fuel cellSOFC-calcinerPower generationCalcinationDirect air captureNegative emissionArticle24230378