A oxygen transfer agent useful for the oxidative dehydrogenation of saturated hydrocarbons includes at least one mixed oxide derived from manganese or compounds thereof, as well as a promoter, such as tungsten and/or phosphorus. The oxygen transfer agent may also include an alkali metal or compounds thereof, boron or compounds thereof, an oxide of an alkaline earth metal, and an oxide containing one or more of one or more of manganese, lithium, boron, and magnesium. A reactor is at least partially filled with the oxygen transfer agent in the form of a fixed or circulating bed and provides an unsaturated hydrocarbon product, such as ethylene and/or propylene. The oxygen transfer agent may be regenerated using oxygen.

This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.

This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.

The present invention relates to a method of converting levulinic acid or a derivative thereof to hydrocarbons and hydrogen by providing a source of levulinic acid or a derivative thereof and converting the levulinic acid or a derivative thereof in the source to hydrocarbons and hydrogen, where converting is carried out in a single reactor. The present invention also relates to methods for producing hydrocarbons and hydrogen.

The present invention relates to a method of converting levulinic acid or a derivative thereof to hydrocarbons and hydrogen by providing a source of levulinic acid or a derivative thereof and converting the levulinic acid or a derivative thereof in the source to hydrocarbons and hydrogen, where converting is carried out in a single reactor. The present invention also relates to methods for producing hydrocarbons and hydrogen.