title: Super-dry reforming of methane intensifies CO2 utilization via Le Chatelier's principle.
abstract: Efficient CO2transformation from a waste product to a carbon source for chemicals and fuels will require reaction conditions that effect its reduction. We developed a "super-dry" CH4reforming reaction for enhanced CO production from CH4and CO2We used Ni/MgAl2O4as a CH4-reforming catalyst, Fe2O3/MgAl2O4as a solid oxygen carrier, and CaO/Al2O3as a CO2sorbent. The isothermal coupling of these three different processes resulted in higher CO production as compared with that of conventional dry reforming, by avoiding back reactions with water. The reduction of iron oxide was intensified through CH4conversion to syngas over Ni and CO2extraction and storage as CaCO3CO2is then used for iron reoxidation and CO production, exploiting equilibrium shifts effected with inert gas sweeping (Le Chatelier's principle). Super-dry reforming uses up to three CO2molecules per CH4and offers a high CO space-time yield of 7.5 millimole CO per second per kilogram of iron at 1023 kelvin.
authors.affiliation: Laboratory for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium.
authors.forename: Lukas C
authors.initials: LC
authors.lastname: Buelens
authors.affiliation: Laboratory for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium. vladimir.galvita@ugent.be guy.marin@ugent.be.
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Galvita
authors.affiliation: Laboratory for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium.
authors.forename: Hilde
authors.initials: H
authors.lastname: Poelman
authors.affiliation: Department of Solid State Sciences, Ghent University, Krijgslaan 281, S1, B-9000 Ghent, Belgium.
authors.forename: Christophe
authors.initials: C
authors.lastname: Detavernier
authors.affiliation: Laboratory for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium. vladimir.galvita@ugent.be guy.marin@ugent.be.
authors.forename: Guy B
authors.initials: GB
authors.lastname: Marin