Abstract:
PURPOSE: A method is provided to manufacture a nickel-alumina mixing aerogel catalyst by supporting nickel onto alumina aerogel differently from an existing alumina supported nickel catalyst or using sol-gel process. CONSTITUTION: The method for manufacturing an alumina aerogel support for a supported nickel-alumina catalyst comprises a first step of dissolving aluminum alkoxide into a heated alcohol solvent; a second step of forming a transparent sol by performing hydrolysis by adding water, acid and alcohol into the solution prepared in the first step; a third step of forming a gel by adding water contained alcohol into the sol after cooling the sol formed in the second step to an ordinary temperature; a fourth step of aging the gel formed in the third step; a fifth step of supercritical drying the gel aged in the fourth step; and a sixth step of primary heat treating the gel dried in the fifth step in an inert atmosphere, and secondary heat treating the primary heat treated gel in an oxygen atmosphere in an air or oxygen atmosphere.
Abstract:
PURPOSE: A production method of a catalyst of nickel class is provided to remarkably increase a life span as having an excellent reaction activity using a sol-gel method and a supercritical desiccation method. CONSTITUTION: An aerogel mixed with nickel-alumina is produced by the steps of dissolving aluminum alkoxide in alcohol solvent heated, forming a transparent brush by a partial hydrolysis, forming a gel in a room temperature, maturing the gel, drying the gel in a supercritical drying method and treating the gel with heat. In here, the synthetic gas is continuously produced by the steps of filling the catalyst in a reactor using a reactor of flowing upward, inputting hydrogen and nitrogen, pre-treating at 600-800°C of a reaction temperature, stopping supplying hydrogen, adding nitrogen to purge hydrogen, and supplying carbon dioxide and methane material which is reacting material with nitrogen. The catalyst used consists of 1 to 40% of nickel and the rest of alumina.
Abstract:
The alloy catalyst obtained by supporting palladium-ruthenium alloy on the carbon carrier is avaible to liquid-phase reducting aromatic nitro compund. The catalyst is prepared by (1) adding palladium chloride and hydrochloric acidic salt of ruthenium into the solution composed of concentrated hydrochloric acid and distilled water, (2) adding activated carbon and sodium carbonate solution into the mixture, and then procipitating the metal salts on the activated carbon, (3) reducing th metal salts with saturated formaldehyde solution, and (4) washing, filtering, drying and pulverizing the production. The weight ratio of ruthenium to total metal component is below 20 wt.%.