Abstract
The oxidative properties of Li/MgO in the absence of O2 were studied at 730° C using C2H4 as a reducing agent and a multisectional flow stainless steel tubular reactor. Large amounts of CO and H2 were determined. It was demonstrated that Li/MgO exhibited a high oxygen mobility. The exchange capacity was (2.4–4.0) × 1020 oxygen atoms per 1 g of the catalyst and the period of oxygen donation was 150 h or more. After the catalyst reduction, its oxygen transfer ability was fully restored by re-oxidation in the stream of air. Oxidation of C2H4 to CO and H2 was accompanied by its decomposition to C and H2. The ratio ΔH2/ΔC2H4 was found to be 1.91 ± 0.13 independently of the oxidation state of the catalyst, the location of the sampling point along the catalyst bed (and the post-catalytic zone) and the duration of the experiment. The mechanism was discussed.
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Taniewski, M., Lachowicz, A., Lachowicz, R. et al. Evidence for a high oxygen mobility in Li/MgO. Catal Lett 26, 355–363 (1994). https://doi.org/10.1007/BF00810609
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DOI: https://doi.org/10.1007/BF00810609