Abstract
The effect of the molar ratio of metal cations Zn2 +/Fe3+ in precursors of double hydroxides on the structure of Zn-Fe oxides of mixed phase composition has been established. With an increase in the ratio of metal cations from 1: 1 to 1:4, in the composition of Zn-Fe mixed oxides consisting of oxides ZnO and Fe3O4, the amount of complex oxides ZnFe2O4 with an isomorphic spinel structure decreases, with an increase in the specific surface area from 27.075 to 34.556 m2/d the pore diameter values of 23.8 nm remain constant. The results of experimental studies of the effect of the composition and structure of Zn-Fe mixed oxides on the component composition of heavy oil of naphthenic aromatic base during its upgrading in a hydrothermal fluid at a temperature of 380°C and a pressure of 22 MPa are presented. The maximum increase in the content of saturated hydrocarbons against the background of a noticeable decrease in the amount of asphaltenes is characteristic of hydrothermally converted oil in the presence of mixed oxides Zn-Fe (1: 4), the content of n-alkanes of the composition C10–C14 increases.
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