Catalytic Pyrolysis of Naphtha on SHS Catalysts

High yield of light olefins by catalytic pyrolysis of naphtha on spinel-based catalysts is reported. The yields of ethylene and propylene reach over 50% and are at least 10% and 5% higher respectively than the yield using thermal Pyrolysis, under the same process conditions. The partial substitution of Mg by Co in MgAl2O4 and the incorporation of Al2O3, SiO2, MgO, H3BO3 in the spinel and SHS synthesis of KVO3 all increase the catalytic conversion efficiency while at the same time they suppress substantially the formation of coke. It was found that SHS-KVO3 catalytically accelerates the gasification of coke deposited on the catalyst surface and its optimum values were found to be more than 10 wt.%. The addition of B2O3 into the KVO3-based catalyst causes a strong interaction between KVO3 and SHS support, which decreases the loss by evaporation of the active phase