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- W2725824849 abstract "Chemical Looping Combustion (CLC) is an emerging clean combustion technology for combustion of fossil fuels with inherent CO2 capture. In the present work, we investigate the use of reducible oxides (CeO2, La2O3) as oxygen carriers and as supports for nickel as active metal using TGA and fixed-bed reactor studies. Although CeO2 demonstrates reducibility (δ ≈ 8% at 800 °C with H2) compared to minimal reducibility for La2O3, the oxygen carrying capacity is negligible compared to typical metals. However, ceria has a pronounced effect if used as support for Ni as oxygen carrier: In a comparison of reducible vs conventional, nonreducible oxide supports (Al2O3, SiO2), all carriers show thermal stability in TGA with H2 as fuel but only reducible supports allow for complete carrier conversion (vs ∼83% for Ni–Al2O3 with H2 and ∼75% with CH4 as fuel at 800 °C). Furthermore, the oxidation and reduction kinetics are accelerated, and the window for efficient total oxidation is strongly enlarged when using ceria supports. Overall, these results indicate significant potential for improved redox properties of oxygen carriers in CLC through a synergistic effect between metals and reducible oxides supports." @default.
- W2725824849 created "2017-07-14" @default.
- W2725824849 creator A5027700633 @default.
- W2725824849 creator A5091797093 @default.
- W2725824849 date "2013-03-29" @default.
- W2725824849 modified "2023-09-27" @default.
- W2725824849 title "Reducible Supports for Ni-based Oxygen Carriers in Chemical Looping Combustion" @default.
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- W2725824849 doi "https://doi.org/10.1021/ef400184b" @default.
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