Abstract: Catalysts for hydrogenation of CO2 to dimethyl ether. These catalysts comprise 0.1-10 wt % per total catalyst weight of a catalytic material containing Pd (e.g. metallic palladium), 0.05-5 wt % per total catalyst weight of a promoter containing Ca (e.g. metallic calcium), as well as 85-99 wt % of CeO2 as a catalyst support. Methods of preparing and characterizing the catalysts as well as processes for catalyzing the hydrogenation of CO2 to dimethyl ether and other byproducts such as methanol, carbon monoxide, and methane portrayed by reactant conversion, product selectivity, and catalyst stability are disclosed.

Abstract: Catalysts for hydrogenation of CO2 to dimethyl ether. These catalysts comprise 0.1-10 wt % per total catalyst weight of a catalytic material containing Pd (e.g. metallic palladium), 0.05-5 wt % per total catalyst weight of a promoter containing Ca (e.g. metallic calcium), as well as 85-99 wt % of CeO2 as a catalyst support. Methods of preparing and characterizing the catalysts as well as processes for catalyzing the hydrogenation of CO2 to dimethyl ether and other byproducts such as methanol, carbon monoxide, and methane portrayed by reactant conversion., product selectivity, and catalyst stability are disclosed.

Abstract: A vanadium oxide catalyst supported on a cerium oxide and zirconium oxide composite core is described. The catalyst comprises 0.1-3 wt % vanadium oxide relative to the total catalyst weight, and the catalyst is in the form of microparticles having diameters of 5-80 ?m. A method using a wetness impregnation technique to produce the catalyst is described. The use of the catalyst in the partial oxidation of methanol to produce formaldehyde is specified, along with the catalyst's stability for reaction periods of 50 or more hours. A method of regenerating the catalyst for multiple reactions is also described.

Abstract: A method of producing dimethyl ether involving contacting methanol with a catalyst in the presence of oxygen in a reactor to form the dimethyl ether. The catalyst comprises manganese on a cerium oxide catalyst support, wherein a weight ratio of manganese to the cerium oxide catalyst support is in the range of 0.005 to 0.5. Further, a method of manufacturing the catalyst, including mixing cerium oxide (CeO2) with a solution comprising manganese salt and a solvent, evaporating the solvent, followed by drying and calcining to form a catalyst which comprises manganese on a cerium oxide catalyst support, wherein a weight ratio of manganese to the cerium oxide catalyst support is in the range of 0.005 to 0.5.

Abstract: A catalyst of vanadium oxide supported on cerium oxide and zirconium oxide is specified. The catalyst comprises 0.1-10 wt % vanadium oxide relative to the total catalyst weight, and the catalyst is in the form of microparticles. A method using a wetness impregnation technique to produce the catalyst is described. The use of the catalyst in the oxidative dehydration of methanol to produce dimethyl ether is specified, along with the catalyst's stability for reaction periods of 50 or more hours.

Abstract: A method of producing dimethyl ether involving contacting methanol with a catalyst in the presence of oxygen in a reactor to form the dimethyl ether. The catalyst comprises manganese on a cerium oxide catalyst support, wherein a weight ratio of manganese to the cerium oxide catalyst support is in the range of 0.005 to 0.5. Further, a method of manufacturing the catalyst, including mixing cerium oxide (CeO2) with a solution comprising manganese salt and a solvent, evaporating the solvent, followed by drying and calcining to form a catalyst which comprises manganese on a cerium oxide catalyst support, wherein a weight ratio of manganese to the cerium oxide catalyst support is in the range of 0.005 to 0.5.

Abstract: The invention relates to a catalyst composition comprising (a) a metal M selected from the group consisting of platinum (Pt), palladium (Pd), rhodium (Rh), rhenium (Re), ruthenium (Ru) and iridium (Ir), (b) tin (Sn), (c) zinc (Zn), (d) alkaline earth metal and (e) a porous metal oxide catalyst support, wherein the amount of each of elements (a), (b) and (d) is independently chosen in the range of from 0.1 to 5 wt. % based on the porous metal oxide catalyst support and wherein the amount of element (c) is chosen in the range of from 0.1 to 2 wt. % based on the porous metal oxide catalyst support. Furthermore, the invention also relates to a process for the preparation of said catalyst composition and its use in non-oxidative dehydrogenation of an alkane, preferably propane.

Abstract: The invention relates to a catalyst composition comprising: (i) a porous metal oxide catalyst support, (ii) a precious metal comprises at least one of platinum (Pt), palladium (Pd), rhodium (Rh), rhenium (Re), ruthenium (Ru) and iridium (Ir), and (iii) tin (Sn), and (iv) zinc (Zn), and/or (v) an alkaline earth metal, wherein the catalyst composition is obtained or obtainable by a process comprising (a) depositing the precious metal, Sn, Zn and/or the alkaline earth metal on the porous metal oxide catalyst support to obtain a catalyst precursor and (b) subjecting the catalyst precursor to calcination in an environment comprising oxygen to obtain a catalyst, wherein step (a) comprises the step of (a1) contacting the porous metal oxide catalyst support with a solution comprising a salt of the precious metal and a salt of tin (Sn) and a salt of zinc (Zn) and/or a salt of the alkaline earth metal.

Abstract: The invention relates to a catalyst composition comprising (a) a metal M selected from the group consisting of platinum (Pt), palladium (Pd), rhodium (Rh), rhenium (Re), ruthenium (Ru) and iridium (Ir), (b) tin (Sn), (c) zinc (Zn), (d) alkaline earth metal and (e) a porous metal oxide catalyst support, wherein the amount of each of elements (a), (b) and (d) is independently chosen in the range of from 0.1 to 5 wt. % based on the porous metal oxide catalyst support and wherein the amount of element (c) is chosen in the range of from 0.1 to 2 wt. % based on the porous metal oxide catalyst support. Furthermore, the invention also relates to a process for the preparation of said catalyst composition and its use in non-oxidative dehydrogenation of an alkane, preferably propane.