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Kinetic Study of the Reduction Step for Chemical Looping Steam Methane Reforming by CeO 2 ‐Fe 2 O 3 Oxygen Carriers
Author(s) -
Hosseini Seyyed Yaghoob,
Khosravi-Nikou Mohammad Reza,
Shariati Ahmad
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900290
Subject(s) - chemical looping combustion , methane , oxygen , steam reforming , hydrogen , chemistry , analytical chemistry (journal) , kinetics , mineralogy , inorganic chemistry , chemical engineering , hydrogen production , materials science , environmental chemistry , organic chemistry , engineering , physics , quantum mechanics
The reduction stage of chemical looping steam methane reforming was investigated to determine the kinetics of the reduction reaction for CeO 2 ‐Fe 2 O 3 mixed oxides. CeO 2 , Fe 2 O 3 , and CeO 2 ‐Fe 2 O 3 mixed oxides with different molar ratios were prepared by chemical precipitation. Characterization tests indicated the lowest Brunauer‐Emmett‐Teller surface area for samples with higher Fe content. The largest area under reduction peaks during hydrogen temperature‐programmed reduction measurements was also related to the samples with highest Fe content. Reduction of the oxygen carriers with lower Fe content was well represented by a phase boundary‐controlled model.