FIELD: chemistry.
SUBSTANCE: invention relates to the synthesis of mesoporous materials, namely, to a method for producing mesoporous xerogels and nanopowders in the system ZrO2(Y2O3)-Al2O3 for catalyst carriers at the methane conversion into synthesis gas. The method is carried out by co-precipitating the original reagents with an aqueous ammonia solution of 0.05-0.15 M. As original reagents, 0.05-0.15 M aqueous solutions of ZrO(NO3)2⋅2H2O, Y(NO3)3⋅6H2O and Al(NO3)3⋅9H2O are used. When the hydroxides are co-precipitated in the reactor, a constant pH value is maintained in the range of 9.15 to 9.45 with a solution NH4Cl. After that, the co-precipitated hydroxides are dried and subjected to cryochemical treatment at a temperature of -20 to -30°C during the day. Then the obtained xerogels are heat treated at a temperature of 500-650°C to produce a metastable tetragonal solid solution based on ZrO2.
EFFECT: production of highly disperse mesoporous xerogels and nanopowders, which are efficiently used as catalyst carriers in the development of catalytic systems.
5 dwg, 2 tbl, 3 ex
