As compared with other two types of catalyst, ferrite catalyst gives lower yield of undesirable by-product oxygenated compounds and better selectivity for butadiene. The catalytie sites, or oxygen species, on ferrite surface active in the selective oxidation of butene to butadiene are studied by the adsorption and TPD measurement of oxygen and cis-butene-2.Three distinet active sites related to selective oxidati/e dehydrogenation, combustion and double bond isomerization are identified. By varyi g the react...
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