Abstract:
PURPOSE: A ruthenium catalyst supported on porous carbon support synthesized by a surfactant-templating method, a method for preparing the same, and a method for producing gamma-butyrolactone using the catalyst are provided to activate the hydrogenation of succinic acid. CONSTITUTION: A method for preparing a ruthenium catalyst supported on porous carbon support includes the following: a carbon precursor and a surfactant are dissolved in an acid solution, and a silica precursor is added into the dissolved solution to obtain a carbon/surfactant/silica complex; the complex is dried and aged at a temperature between 80 and 120 deg C under an air condition to obtain partially carbonated carbon/surfactant/silica complex; the partially carbonized complex is treated with a sulfuric acid aqueous solution; the treated complex is washed, filtered, and carbonated at a temperature between 800 and 1000 deg C; silica template components are eliminated from the carbonated complex based on hydrofluoric acid to obtain a porous carbon support; and a ruthenium precursor is impregnated in the porous carbon support. [Reference numerals] (AA,BB,CC) Sucrose; (DD) Hydrothermal synthesis; (EE) Silica precursor; (FF,HH) Heat; (GG) Surfactant silica precursor; (II) Carbon slurry; (JJ) Carbon/silica slurry; (KK) Carbon/silica/surfactant slurry; (LL,MM,OO) Carbonization; (NN,PP) Hydrofluoric acid treatment; (QQ) Carbon support manufactured by a hydrothermal method; (RR) Carbon support manufactured by a templating method; (SS) Carbon support manufactured by a surfactant-templating method
Abstract:
PURPOSE: A palladium catalyst supported on an alumina xerogel support with controlled acidity and a method for preparing γ-butyrolactone based on the hydrogenation of succinic acid using the catalyst are provided to thermo-chemically stabilize a catalytic process by optimally combining the acid characteristic of the support and the hydrogenation activity of palladium. CONSTITUTION: A palladium catalyst supported on an alumina xerogel support with controlled acidity is obtained by gelating an aluminum precursor based on a sol-gel method and implementing a thermal treatment. The average pore size of the palladium catalyst is between 2 and 10nm. The surface area of the palladium catalyst is between 100 and 300m^2/g. The temperature of the thermal treatment is between 700 and 900 degrees Celsius. 1-10 parts by weight of the palladium catalyst is supported by 100 parts by weight of the alumina xerogel support.
Abstract:
PURPOSE: A heteropoly acid support catalyst fixed on a porous spherical carbon containing nitrogen is provided to enhance support amount of the heteropoly acid. CONSTITUTION: A heteropoly acid support catalyst fixed on a porous spherical carbon containing nitrogen is prepared by synthesizing, thermal treating and reducing a carbon precursor containing a nitrogen ingredient with a spherical resin. The catalyst is fixed by reacting a porous spherical carbon with heteropoly acid in a weight ratio of 1 : 0.01-2 in an ion form of amine group and heteropoly acid. The carbon precursor is selected from melamine-formaldehyde resin, polypyrrole, polyanyline and polythiophene.