DefinePK

Abstract

In this research the hollow microspheres based on fly ash from the Ekibastuz coal deposit (Kazakhstan), produced as a result of the operation of TPP-2 (Almaty, Kazakhstan) were used for investigation of two processes. The composite on the base of cenisheres was applied in the technology of SO2 oxidation with oxygen in aqueous solution at T=40-60°C. Conditions of selective oxidation of SO2 (100%) to obtain sulfuric acid as a product were optimized. Specific surface of the catalyst calculated according to full isotherms of low-temperature adsorption of nitrogen by BET method makes 12.6 m2/g. Integral volume of pores makes 0.57 ml/g. The results showed that the degree of SO2 removal was up to 94.9%. The catalysts based on fly ash cenospheres with addition of natural zeolite from Tayzhuzgen field (Kazakhstan) were also tested in the process of catalytic cracking of fuel oil (with preliminary electromagnetic excitation of hydrocarbon molecules) to obtain light carbon fractions. On the optimal catalyst in the products of oxidative cracking of fuel oil, the fraction of light gas oil is the main part. Determination of the individual composition of the hydrocarbons included in this fraction showed that the formation of C7-C12 hydrocarbons happened exclusively due to the symmetric decomposition of C14-C24 paraffins, since the products of this reaction are the corresponding a-olefins and n-alkanes.