OBTAINING POROUS CERAMIC SILICON CARBIDE-BASED CONVERTERS FOR DEHYDROGENATION OF ETHYLBENZENE INTO STYRENE

A porous, catalytically active converter was synthesized based on coarse SiC. For the synthesis of the converter, ultrafine additives of the eutectic composition MgO and SiC were introduced into the original SiC powder. The resulting mixture was pressed at the maximum pressure from 75 to 125 MPa, followed by sintering in the range from 1200 to 1450 degrees C. The open porosity of the converters was similar to 40%, the size of the pores ranged from 4 to 6 mu m. At 600 degrees C, ethylbenzene conversion was similar to 73%, styrene yield similar to 9%, selectivity of styrene similar to 12.3%. The degree of carbonization of the catalyst after 2.5 h did not exceed similar to 0.003 wt.%, which is an ultra-low indicator that radically increases the life of a catalytic converter without the need for regeneration or replacement.