INFLUENCE OF THE DISPERSION DEGREE OF MINERAL ADDITIVES ON THE YIELD AND COMPOSITION OF KUKERSITE SHALE SEMICOKING PRODUCTS

Our earlier investigations have demonstrated that the mineral matter o f oil shales considerably influences the yield and composition of thei r thermal decomposition products. However, up to now there are no data about the effect of the dispersion degree of mineral additives on the thermolysis process. Using model mixtures with calcium carbonate and silicon dioxide chemically precipitated on the surface of kerogen conc entrate (Estonian kukersite) particles, it has been established that h igh-dispersed CaCO3 and SiO2 inluence the yield and composition of sem icoking products to a notable higher degree than ground, relatively co arce-grained minerals.