Near 100% CO selectivity in nanoscaled iron-based oxygen carriers for chemical looping methane partial oxidation.

ABSTRACT: Chemical looping methane partial oxidation provides an energy and cost effective route for methane utilization. However, there is considerable CO₂ co-production in current chemical looping systems, rendering a decreased productivity in value-added fuels or chemicals. In this work, we demonstrate that the co-production of CO₂ can be dramatically suppressed in methane partial oxidation reactions using iron oxide nanoparticles embedded in mesoporous silica matrix. We experimentally obtain near 100% CO selectivity in a cyclic redox system at 750-935 °C, which is a significantly lower temperature range than in conventional oxygen carrier systems. Density functional theory calculations elucidate the origins for such selectivity and show that low-coordinated lattice oxygen a

SUBMITTER: Liu Y 

PROVIDER: S-EPMC6890731 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature