A method for producing olefins using a circulating fluidized bed process, includes: supplying a propane-containing hydrocarbon mixture and a dehydrogenation catalyst into a riser, which is a fast fluidization regime, to cause a dehydrogenation reaction; separating, from a propylene mixture, the catalyst which is a product of the dehydrogenation reaction; removing unseparated hydrocarbon compounds remaining in the catalyst separated in the separating; continuously regenerating the catalyst by mixing the catalyst stripped in the removing with a gas containing oxygen; circulating the catalyst regenerated in the continuously regenerating to the supplying and resupplying it into the riser; and preparing propylene by cooling, compressing, and separating the propylene mixture which is a reaction product separated in the separating.

A method for making light olefins by dehydrogenation may include operating a catalytic dehydrogenation process, monitoring a composition of a combustion gas in the combustor to detect a concentration of one or more hydrocarbons, and selectively adding a combustion additive with the catalyst when the combustion gas comprises one or more hydrocarbons in an amount greater than 5% of a lower flammability level of the combustion gas at a temperature and pressure of the combustor. The combustion additive may comprise from 0.1 wt. % to 10 wt. % of gallium, from 100 parts per million by weight (ppmw) to 10,000 ppmw of manganese, from 0 ppmw to 100 ppmw of noble metals, and at least 85 wt. % support. In other embodiments, the combustion additive may comprise from 0.1 wt. % to 10 wt. % of chromium, from 0 ppmw to 100 ppmw of gallium and noble metals, and at least 85 wt. % support.

Disclosed are catalyst for extracting high purity hydrogen from organic hydrogen carrier and catalyst composite of preparing same. In detail, a catalyst composite comprising: a support comprising a metal oxide doped with phosphorus(P); and a catalyst comprising platinum group nanoparticle and sulfur(S) and supported on the support, wherein the platinum group nanoparticle may comprise a platinum group element, and the sulfur(S) may be doped on a part or all of a surface of the platinum group nanoparticle. The present disclosure enables easily and quickly support metal nanoparticles on powder and bead-structured supports using wet-impregnation.

The present invention provides a light alkane dehydrogenation catalyst, and a preparation method and application thereof, and belongs to the technical field of petrochemical technology. The catalyst uses at least one of precious metals Pt, Pd, Ru and Rh as an active component, at least one of transition metals Ga, V, In, Sn, Mn, Ce, Fe and Ni as a promoter, and a modified zinc aluminate carrier as a carrier; the chemical composition of the modified zinc aluminate carrier is of the general formula ZnM.sub.xAl.sub.yO.sub.4, where x is 0.01-0.99, y is 0.01-1.99, and it satisfies x+y=2; M is selected from at least one of the rare earth elements La, Ce, Pr, Sm and Er. The catalyst prepared by such a modified zinc aluminate carrier has the characteristics of high propane conversion rate, high selectivity for product propylene, strong resistance to sintering, good stability, etc.

Disclosed are shaped dehydrogenation catalysts, methods for making the catalysts, and methods for dehydrogenating a hydrocarbon using the catalyst. A method for making the shaped dehydrogenation catalyst can include combining a group 13 metal precursor and a group 1 metal precursor with a catalyst support precursor to form a shapeable material, shaping the shapeable material to form a wet shaped material, drying the wet shaped material to form a dry shaped material, and calcining the dry shaped material to form the shaped dehydrogenation catalyst.