Optimization of oxycombustion capillary membrane reactors with protective and catalytic layers

A key strategy for reducing greenhouse gas emissions is advancing carbon capture and storage (CCS) technologies, with oxycombustion playing a vital role in industrial decarbonization. Oxygen transport membranes (OTMs) enable flexible oxygen production and integration with catalytic membrane reactors (CMRs) to enhance process efficiency. However, OTMs with high permeation are unstable in CO 2 and CH 4 environments. This study investigates methane oxidation over Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) capillary membranes with the effect of protective catalytic layers of BSCF, Ce 0.8 Tb 0.2 O 2-δ and Co 2 MnO 4 / Ce 0.8 Tb 0.2 O 2-δ . The developed catalytic membrane reactors, formed by BSCF membranes with these catalytic protective layers, achieved complete CH 4 conversion and total selectivity for oxycombustion under the selected conditions while maintaining their performance and structural stability under CH 4 and CO 2 exposure.