Nicolas Nauels, Franz Beggel, Michael Modigell, Ewald Pfaff, Christoph Broeckmann, Anke Kaletsch:
HIGH TEMPERATURE AIR SEPARATION FOR OXYFUEL‐COMBUSTION BY MEANS OF A CERAMIC MEMBRANE MODULE
In: Jan Kudlacek, Zlatan Car, Tomaz Pepelnjak, Michael Pakosta (Eds.): IN-TECH 2011 Proceedings of International Conference on Innovative Technologies, 408-409
The Oxycoal‐AC project is investigating an oxyfuel power plant process in which oxygen is supplied by mixed ion electron conducting membranes. Process calculations show, that the total net efficiency loss of a membrane based oxyfuel process can be reduced to 5.5%‐points depending on the way of membrane integration. Optimal process parameters were identified by using feed pressures in a range from 10‐15 bar while applying a moderate vacuum on the membrane permeate side. Within the project, a 15 m²‐membrane module has been developed that can perform under these conditions. Tubular Ba0.5Sr0.5Co0.8Fe0.2O3‐δ (BSCF) membranes were manufactured by cold isostatic pressing. With a lab scale module oxygen purities of >99% were achieved while oxygen permeation rates of 1.5 ml(STP) min‐1cm‐2 were measured. Currently a pilot scale module is under construction.
Oxyfuel, MIEC, Oxycoal, BSCF, Oxygen transport membrane, module