The effect of the carrier composition on the properties of the cobalt catalyst
The article presents the results of a study of the physicochemical and catalytic properties of cobalt catalysts on a mixed zeolite-containing carrier. Samples of catalysts containing 10% cobalt and from 30 to 70% high-silica zeolite ZVM were prepared by impregnation with subsequent heat treatment. Methods of IR spectroscopy, scanning electron microscopy (SEM) in combination with energy dispersion analysis (EMF) were used to study the physicochemical properties of catalysts. The catalytic properties were studied in a reactor with a fixed layer at a temperature of 240 °C, a pressure of 20 MPa, a volumetric gas velocity (OSG) of 1000 h-1, H2 / CO = 2. As a result of IR spectroscopy, the presence of Si-O, Al-OH, Co-O, etc. functional groups was detected, SEM-EMF images confirmed the uniform distribution of cobalt on the surface of catalysts. The dependences of the catalytic characteristics depending on the content of zeolite were established, the maximum activity was recorded for a sample containing 70% of ZVM zeolite.