In the present disclosure, a composite oxide catalyst capable of effectively suppressing side reactions at the time of dehydrogenation of C4 hydrocarbons having single bonds or one double bond and a process for preparing butadiene, in particular 1,3-butadiene, with a high selectivity and a high yield using the same are described.

To provide a uniform-type platinum-loaded alumina catalyst demonstrating excellent performance in terms of catalyst life, a uniform-type platinum-loaded alumina catalyst includes: an alumina carrier; sulfur or a sulfur compound dispersed over an entire cross section of the alumina carrier; platinum dispersed and loaded over the entire cross section of the alumina carrier; one or more alkali metals selected from the group consisting of sodium, potassium, and calcium. Preferably, the content of platinum is 0.05 to 5.0 wt % calculated as elemental platinum. The content of the sulfur or the sulfur compound preferably is 0.15 to 5.0 wt % calculated as elemental sulfur. The content of the alkali metal preferably is 0.1 to 5.0 wt % calculated as elemental alkali metal.

A catalytic composite comprises a first component selected from Group VIII noble metal components and mixtures thereof, a second component selected from one or more of alkali and alkaline earth metal components, and a third component selected from one or more of tin, germanium, lead, indium, gallium, and thallium, all supported on an alumina support comprising delta alumina having an X-ray diffraction pattern comprising at least three 2θ diffraction angle peaks between 32.0° and 70.0°. The at least three 2θ diffraction angle peaks comprise a first 2θ diffraction angle peak of 32.7°±0.4°, a second 2θ diffraction angle peak of 50.8°±0.4°, and a third 2θ diffraction angle peak of 66.7°±0.8°, wherein the second 2θ diffraction angle peak has an intensity of less than about 0.06 times the intensity of the third 2θ diffraction angle peak.

A process is provided for dehydrogenating a paraffinic hydrocarbon comprising sending the paraffinic hydrocarbon to a fluidized bed reactor to be contacted at dehydrogenation reaction conditions with a catalyst composition comprising less than about 0.0999 wt % platinum and about 0.05-2.5 wt % Group I or Group II elements or a mixture thereof. The catalytic composition is prepared without addition of tin, gallium, indium, germanium or lead.

A catalyst for dehydrogenation of hydrocarbons includes a support including zirconium oxide and alumina. A concentration of the zirconium oxide in the catalyst is in a range of from 1 weight percent (wt. %) to 20 wt. %. The catalyst includes from 0.01 wt. % to 2 wt. % of an alkali metal or alkaline earth metal. The catalyst includes from 1 wt. % to 2 wt. % of tin. The catalyst includes from 0.1 wt. % to 2 wt. % of a platinum group metal. The alkali metal or alkaline earth metal, tin, and platinum group metal are disposed on the support.

The present invention provides a catalyst for aromatization of a long-carbon chain alkane and a preparation method thereof. In the present invention, a molecular sieve containing a BEA structure is taken as an active component and mixed with a carrier, and then the mixture is formed, dried and calcined to obtain the catalyst for aromatization of a long-carbon chain alkane. The active component is prepared by taking a Naβ molecular sieve as a raw material and modifying through the following steps of: first obtaining an Hβ molecular sieve through ammonium ion-exchange, and then conducting dealumination and silicon insertion treatment of the Hβ molecular sieve through first hydrothermal treatment; forming a mesoporous structure in a molecular sieve framework through second hydrothermal treatment; reducing the acidity of the catalyst by potassium ion exchange, and finally using metal modification to improve the capability of the catalyst for catalyzing the aromatization of the long-carbon chain alkane and enhancing the toluene selectivity. The catalyst provided by the present invention shows high stability in the aromatization of the long-chain alkane and has a service life up to 170 h or above and aromatic hydrocarbon selectivity up to 80%, and the selectivity to toluene in aromatic hydrocarbon products can reach 85.5%.

The present invention provides a catalyst for aromatization of a long-carbon chain alkane and a preparation method thereof. In the present invention, a molecular sieve containing a BEA structure is taken as an active component and mixed with a carrier, and then the mixture is formed, dried and calcined to obtain the catalyst for aromatization of a long-carbon chain alkane. The active component is prepared by taking a Naβ molecular sieve as a raw material and modifying through the following steps of: first obtaining an Hβ molecular sieve through ammonium ion-exchange, and then conducting dealumination and silicon insertion treatment of the Hβ molecular sieve through first hydrothermal treatment; forming a mesoporous structure in a molecular sieve framework through second hydrothermal treatment; reducing the acidity of the catalyst by potassium ion exchange, and finally using metal modification to improve the capability of the catalyst for catalyzing the aromatization of the long-carbon chain alkane and enhancing the toluene selectivity. The catalyst provided by the present invention shows high stability in the aromatization of the long-chain alkane and has a service life up to 170 h or above and aromatic hydrocarbon selectivity up to 80%, and the selectivity to toluene in aromatic hydrocarbon products can reach 85.5%.

A method for manufacturing a hydrocarbon compound from carbon dioxide, said method including: (a) a step of preparing an absorption-conversion catalyst that includes an oxide carrier, a first component supported on the oxide carrier and including at least one type of metal selected from the group consisting of alkali metals and alkaline earth metals, and a second component supported on the oxide carrier and including at least one type of metal selected from the group consisting of Ni, Fe, Co, Cu, and Ru; (b) a step of bringing the absorption-conversion catalyst and a carbon dioxide-including gas into contact under higher pressure than atmospheric pressure, and causing the carbon dioxide to be stored in the absorption-conversion catalyst; and (c) a step of bringing the absorption-conversion catalyst that has the carbon dioxide stored therein and a reducing gas into contact under higher pressure than atmospheric pressure, and obtaining the hydrocarbon compound.

A hydrocarbon reforming catalyst for forming a synthetic gas containing hydrogen and carbon monoxide from a hydrocarbon-based gas, the hydrocarbon reforming catalyst containing a complex oxide having a perovskite structure, the complex oxide having at least a first crystal phase containing BaCeO.sub.3 as a primary component and also containing Ru.

In the present disclosure, a composite oxide catalyst capable of effectively suppressing side reactions at the time of dehydrogenation of C4 hydrocarbons having single bonds or one double bond and a process for preparing butadiene, in particular 1,3-butadiene, with a high selectivity and a high yield using the same are described.