An oxidative dehydrogenation catalyst having: a structure having a formula Mo.sub.vV.sub.wNb.sub.yBi.sub.zO.sub.x, where v is 1, w is from 0.1 to 0.5, y is from 0.001 to 0.3, z is from 0.01 to 0.3, and x is the oxygen content required to charge-balance the structure. The oxidative dehydrogenation catalyst has a Pba2-32 space group, characterized by reflections determined with CuK.sub. X-ray diffraction (XRD) as follows.

A method for the dehydrogenation of lower alkanes is disclosed. The method employs a chromium-alumina dehydrogenation catalyst with high chromium content supported on eta-alumina. The catalyst contains greater than 25 percent by weight chromium in the form of chromium (III) oxide, and exhibits extended stability over traditional alkane dehydrogenation catalysts.

A method for the dehydrogenation of lower alkanes is disclosed. The method employs a chromium-alumina dehydrogenation catalyst with high chromium content supported on eta-alumina. The catalyst contains greater than 25 percent by weight chromium in the form of chromium (III) oxide, and exhibits extended stability over traditional alkane dehydrogenation catalysts.

The present invention relates to a catalyst for the dehydrogenation of hydrocarbons which is based on iron oxide and additionally comprises at least one potassium compound, at least one cerium compound, from 0.7 to 10% by weight of at least one manganese compound, calculated as Mn02, and from 10 to 200 ppm of at least one titanium compound, calculated as TiO2, and also to a process for the production thereof. Furthermore, the present invention relates to a process for the catalytic dehydrogenation of hydrocarbons using the catalyst of the invention.

The present invention belongs to the technical field of supported catalysts, and discloses a supported core-shell structured ZnO catalyst, and a preparation method and use thereof. With Al.sub.2O.sub.3 as a support and ZnO as active sites, the catalyst is characteristic of a NiZn@ZnO core-shell structure, which consists of a NiZn alloy core and a ZnO shell The preparation method comprises firstly dissolving Ni(NO.sub.3).sub.3.Math.6H.sub.2O and Zn(NO.sub.3).sub.2.Math.6H.sub.2O in deionized water; then impregnating Al.sub.2O.sub.3 with the solution described above, followed by uniform ultrasonic dispersion and complete drying; and finally the obtained solid is calcinated and reduced to obtain the target catalyst, which exhibits high activity, selectivity and stability. The catalyst can be used for the dehydrogenation of light alkanes to alkenes, especially in dehydrogenation of propane to propylene.

The invention relates to a catalyst composition suitable for the non-oxidative dehydrogenation of alkanes having 2-8 carbon atoms comprising silico-zinc aluminate, wherein the relative molar ratios of the elements comprised in said composition are represented by Si.sub.xZn.sub.1-xAl.sub.2O.sub.4, wherein x stands for a number in the range from 0.003 to 0.76. The invention also relates to a process for the preparation of said catalyst composition, to a process for the non-oxidative dehydrogenation of alkanes, preferably isobutane using said catalyst and to the use of said catalyst in a process for the non-oxidative dehydrogenation of alkanes.

An alkane dehydrogenation catalyst including a support; and on the support. an active layer including gallium oxide, aluminum oxide, cerium oxide, a Group 1 metal oxide, and a Group 8-11 metal oxide. The catalyst composition of the examples comprises oxides of gallium, cerium, potassium, platinum and aluminium.

Methods of activating and/or reactivating a catalyst composition comprising a porous metal oxide (MO.sub.x) catalyst are disclosed. Methods of catalyzing a reaction using a catalyst composition comprising a porous metal oxide catalyst activated and/or reactivated by such a method are also disclosed.

The invention relates to the use of a supported, platinum-containing and sulfur-containing shell catalyst for the partial or complete dehydrogenation of perhydrogenated or partially hydrogenated cyclic hydrocarbons. The present invention also relates to a method for producing a platinum-containing and sulfur-containing shell catalyst and to a platinum-containing and sulfur-containing shell catalyst. The present invention further relates to a method for the partial or complete dehydrogenation of perhydrogenated or partially hydrogenated cyclic hydrocarbons.

A composite photocatalyst, comprising V.sub.2C@V.sub.2O.sub.5/TiO.sub.2, is disclosed herein. Additionally, a process for producing this composite, particularly V.sub.2C@V.sub.2O.sub.5/TiO.sub.2, involves the steps of preparing V.sub.2C@V.sub.2O.sub.5/TiO.sub.2 composite; grinding the V.sub.2C@V.sub.2O.sub.5/TiO.sub.2 composite; and calcining the ground product to obtain the composite photocatalyst V.sub.2C@V.sub.2O.sub.5/TiO.sub.2. Furthermore, the disclosure encompasses utilizing the composite photocatalyst in a CO.sub.2 reduction process, wherein the photocatalyst is irradiated in a photoreactor system.