ISSN:
1572-879X
Keywords:
lithium
;
magnesia
;
oxide reduction
;
oxygen mobility
;
ethylene oxidation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00810609
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