Synthesis of membranes in the combustion mode for the process of steam reforming of dimethyl ether
The new generation porous metal-ceramic membranes have been developed by the SHS method in vacuum from a mixture of a large nickel powder (average particle size is 100 μm) and ine powders of cobalt oxide Co 3O4 (average particle size is 10-15 nm) and aluminum (average particle size is 5 - 10 μm). During the synthesis, the membrane frame is formed from large particle fractions with open pores of 2,6 - 5,1 μm in size, which leads to an increase in membrane permeability and a large expenditure of the substrate. As a result, porous metal-ceramic catalytically active membranes containing nickel and cobalt nanoparticles with a size of 10 - 20 nm in surface pore layers have been obtained. It have found that the complete conversion of dimethyl ether (DME) is achieved at a temperature of 450 °C to obtain synthesis gas and ultrapure hydrogen.