HYDROCARBON-AMMONIA MOLDING - A NEW TECHNOLOGY FOR PRODUCTION OF COMBUSTION CATALYSTS

Fluidized bed catalytic combustion has proved to be very promising for industrial application. The milestone problem is development of suppo rt and catalyst with high mechanical and thermal stability. We have de veloped a new technology for production of alumina supports with desir ed spherical shape, texture and structure. Properties of spherical gra nules depend on the method of granulation and most attention has been paid to development and optimization of hydrocarbon-ammonia moulding t o produce uniform alumina spheres. Optimization of high quality sphere s production focused on study of effect of initial hydroxide propertie s and molding conditions on properties of final product. Modification of spherical alumina with oxides of Mg, la, Ce, and Si proved to be ef fective to substantially improve the mechanical and thermal stability. This effect is most pronounced when pairs of these dopes are introduc ed simultaneously.