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Development of Sinter-Resistant Core–Shell LaMnxFe1–xO3@mSiO2 Oxygen Carriers for Chemical Looping Combustion

This work investigates the possibility of using LaMn0.7Fe0.3O3.15@mSiO2 as oxygen carriers for chemical looping combustion (CLC). CLC is a new combustion technique with inherent separation of CO2 from atmospheric N2. LaMn0.7Fe0.3O3.15@mSiO2 core–shell materials were prepared by coating a layer of mesostructured silica around the agglomerated perovskite particles. The oxygen carriers were characterized using different methods, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 sorption, hydrogen temperature-programmed reduction (H2-TPR), and temperature-programmed desorption of oxygen (TPD-O2). The reactivity and stability of the carrier materials were tested in a special reactor, allowing for short contact time between the fluidized carrier and the reactive gas [Chemical Reactor Engineering Centre (CREC) fluidized riser simulator]. Multiple reduction–oxidation cycles were performed. TEM images of the carriers showed that a perfect mesoporous sil...

Authors:   Zahra Sarshar; Zhenkun Sun; Dongyuan Zhao; Serge Kaliaguine
Journal:   Energy & Fuels
Year:   2012
DOI:   10.1021/ef3003137
Publication date:   07-May-2012
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