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Iron–Nickel Alloys for Carbon Dioxide Activation by Chemical Looping Dry Reforming of Methane
Author(s) -
More Amey,
Bhavsar Saurabh,
Veser Götz
Publication year - 2016
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.201500539
Subject(s) - chemical looping combustion , methane , syngas , carbon dioxide reforming , reactivity (psychology) , chemistry , carbon dioxide , combustion , chemical engineering , carbon fibers , oxygen , nickel , inorganic chemistry , catalysis , alloy , cobalt , materials science , organic chemistry , medicine , alternative medicine , pathology , composite number , engineering , composite material
Chemical looping combustion is a clean combustion technology for fossil or renewable fuels. We have previously shown that the process can also be used to enable CO 2 activation through reduction to CO with Fe oxygen carriers in so‐called “chemical looping dry reforming” (CLDR). Although Fe shows good reactivity with CO 2 , its reactivity with methane as a fuel is low. In contrast, Ni is highly reactive for methane conversion but cannot be oxidized with CO 2 . Here, we demonstrate that Fe–Ni alloys combine the reactivities of each metal synergistically. By combining materials synthesis and characterization with reactive evaluation in multicycle CLDR operation, we demonstrate that relatively low amounts of Ni suffice to activate the carrier for methane conversion and that the presence of Fe enables the reoxidation of Ni with CO 2 . Moreover, the weak oxidant CO 2 allows the controlled oxidation of the Fe–Ni alloy, which enables CH 4 upgrading through syngas (CO+H 2 ) production.