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Carbon Dioxide Reforming of Methane using an Isothermal Redox Membrane Reactor
Author(s) -
Michalsky Ronald,
Neuhaus Dominique,
Steinfeld Aldo
Publication year - 2015
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500065
Subject(s) - syngas , methane , redox , carbon dioxide reforming , membrane reactor , partial oxidation , carbon monoxide , hydrogen , catalysis , oxygen , carbon dioxide , carbon fibers , isothermal process , chemistry , inorganic chemistry , steam reforming , methane reformer , hydrogen production , materials science , ceramic membrane , ceramic , organic chemistry , thermodynamics , composite number , physics , composite material
The continuous production of carbon monoxide (CO) and hydrogen (H 2 ) by dry reforming of methane (CH 4 ) is demonstrated isothermally using a ceramic redox membrane in absence of additional catalysts. The reactor technology realizes the continuous splitting of CO 2 to CO on the inner side of a tubular membrane and the partial oxidation of CH 4 with the lattice oxygen to form syngas on the outer side. La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐ δ (LSCF) membranes evaluated at 840–1030 °C yielded up to 1.27 μmol CO ${{\rm g}{{- 1\hfill \atop {\rm LSCF}\hfill}}}$ s −1 from CO 2 , 3.77 μmol H₂ g −1 s −1 from CH 4 , and CO from CH 4 at approximately the same rate as CO from CO 2 . We compute the free energy of the oxygen vacancy formation for La 0.5 Sr 0.5 B 0.5 B′ 0.5 O 3− δ (B, B′=Mn, Fe, Co, Cu) using electronic structure theory to understand how CO 2 reduction limits dry reforming of methane using LSCF and to show how the CO 2 conversion can be increased by using advanced redox materials such as La 0.5 Sr 0.5 MnO 3− δ and La 0.5 Sr 0.5 Mn 0.5 Co 0.5 O 3− δ .