6results about "Preparation by dehydrogenation" patented technology

The application discloses a dehydrogenation catalyst and a precursor, a preparation method and application thereof. The dehydrogenation catalyst precursor is obtained through the following steps: mixing an aqueous solution of a precipitant and an aqueous solution of a metal salt to perform a precipitation reaction; and then performing post-treatment. The aqueous solution of the metal salt comprises a copper salt and a carrier alkaline earth metal salt. The temperature of the precipitation reaction is 30-90 DEG C. The end point pH value of the precipitation reaction is 6.0-10.0. The dehydrogenation catalyst precursor comprises an active component precursor and a carrier. The active component precursor is copper oxide. The carrier is one or more of alkaline earth metal oxides. The content of the copper oxide is 10%-75%. The content of the carrier is 5%-51%. The NH3 adsorption amount of the dehydrogenation catalyst precursor is less than 90 umol / g. The dehydrogenation catalyst obtained by reducing the dehydrogenation catalyst precursor is applied to a dehydrogenation reaction for preparing methyl isobutyl ketone. The temperature of the dehydrogenation reaction is 200-300 DEG C. The pressure of the dehydrogenation reaction is 0-0.5 MPa, and the dehydrogenation catalyst has high conversion rate and selectivity.

The present invention provides a method for producing hydrogen that allows for the generation of hydrogen storage compounds and the dehydrogenation reaction of the generated hydrogen storage compounds to be carried out under mild conditions and at a lower cost. [Solution] A method for producing hydrogen, comprising subjecting a secondary alcohol compound obtained by hydrogenating a ketone compound using baker's yeast to a dehydrogenation reaction in the presence of a metal complex catalyst to obtain hydrogen.

Provided is a method for producing hydrogen. The method can promote the production of a hydrogen storage compound and the dehydrogenation reaction of the resulting hydrogen storage compound under mild conditions with further reduced cost. The method for producing hydrogen includes hydrogenating a ketone using baker's yeast to obtain a secondary alcohol, and subjecting the secondary alcohol to a dehydrogenation reaction in the presence of a metal complex catalyst to obtain hydrogen.

This invention proposes a method for preparing and applying a cadmium sulfide-cobalt hydroxide-graphene photocatalyst. The method includes: first, preparing CdS nanocubes; then, sequentially adding a graphene oxide solution, CdS nanocubes, and cobalt nitrate hexahydrate to deionized water to obtain a mixed solution; finally, adding a solution containing trisodium citrate and hexamethylenetetramine to the mixed solution; and then sequentially subjecting the mixture to oil bath heating and freeze-drying to obtain a cadmium sulfide nanocube-cobalt hydroxide nanosheet array-graphene composite photocatalyst. This invention introduces dual auxiliary catalysts, combining CdS with GR and Co(OH)2 cocatalysts in an appropriate manner to promote charge separation / transfer and inhibit photocorrosion, thereby improving the overall photocatalytic hydrogen production coupled with benzyl alcohol oxidation to benzaldehyde performance, and effectively enhancing the performance of CdS.

A process comprising (a) providing used tire feedstock; (b) gasifying the used tire feedstock to produce a gaseous stream, where the gaseous stream includes carbon monoxide, hydrogen, and carbon dioxide; (c) biosynthetically converting at least a portion of the carbon monoxide, hydrogen, and carbon dioxide within the gaseous stream to produce a first product stream; (d) converting at least a portion of the first product stream to a second product stream, where the second product stream includes acetaldehyde and hydrogen; (e) routing a portion of the hydrogen within the second product stream to said step of biosynthetically converting at least a portion of the carbon monoxide, hydrogen, and carbon dioxide within the gaseous stream; and (f) converting at least a portion acetaldehyde to butadiene monomer.