Abstract
Iron oxide polymers intercalated and/or loaded within täniolite have been studied as a CO2 decomposition medium. Fe2+ was exchanged for Li+ in täniolite, oxidized by air‐bubbling at 60°–70°C. The basic d‐spacing (13.75 Å in the Li+ form) was expanded to give 14.86 Å in the Fe2+ form. Oxidation by air in the form of suspension gave a 15.3‐Å phase, which was ascribed to formation of magnetite within the interlayer. The interlayer distance of the intercalated phase remained the same upon heating at 300°C. The magnetite–intercalated täniolite was heated to activate in a H2 and/or H2O steam. CO2 decomposition reactivity at 300°C has been evidenced by evolution of CO gas. The high reactivity for CO2 decomposition is ascribed to the highly dispersed iron oxide ceramics within the interlayer of täniolite Li[(Mg2Li)(Si4O10)]F2nH2O.
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