Europium Oxybromide Catalysts for Efficient Bromine Looping in Natural Gas Valorization.

Author(s) Paunović, V.; Lin, R.; Scharfe, M.; Amrute, A.P.; Mitchell, S.; Hauert, R.; Perez-Ramirez, J.
Journal Angew Chem Int Ed Engl
Date Published 2017 Aug 07

The industrialization of bromine-mediated natural gas upgrading is contingent on the ability to fully recycle hydrogen bromide (HBr), which is the end form of the halogen after the activation and coupling of the alkanes. Europium oxybromide (EuOBr) is introduced as a unique catalytic material to close the bromine loop via HBr oxidation, permitting low-temperature operation and long lifetimes with a stoichiometric feed (O2 :HBr=0.25)-conditions at which any catalyst reported to date severely deactivates because of excessive bromination. Besides, EuOBr exhibits unparalleled selectivity to methyl bromide in methane oxybromination, which is an alternative route for bromine looping. This novel active phase is finely dispersed on appropriate carriers and scaled up to technical extrudates, enhancing the utilization of the europium phase while preserving the performance. This catalytic system paves the way for sustainable valorization of stranded natural gas via bromine chemistry.

DOI 10.1002/anie.201704406
ISSN 1521-3773
Citation Angew Chem Int Ed Engl. 2017;56(33):97919795.

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