Home – Home – Jornals – Chemistry for Sustainable Development 2021 number 2

The effect of the nature of silicon source on the physicochemical properties of synthesized Zn-aluminosilicates is studied, along with their catalytic activity in the course of propane conversion into aromatic hydrocarbons. It is shown that the source of silicon plays an important role in the hydrothermal synthesis of Zn-aluminosilicate since it affects the crystallization rate, physicochemical and catalytic properties of the final product. The tests of the catalysts indicate that they are highly active in propane aromatization. The selectivity of the formation of aromatic hydrocarbons over the prepared samples reaches more than 40% with almost complete conversion of the feedstock. The highest aromatization activity is exhibited by the Zn-aluminosilicate synthesized using carbon white. The yield of aromatic hydrocarbons over this catalyst reaches 42.9 % at a temperature of 600 °C, while the conversion is 99 %. The properties of the synthesized zinc aluminosilicates are investigated by means of X-ray phase analysis, temperature-programmed desorption of ammonia, and low-temperature adsorption of nitrogen. As a result, distinguishing features of the synthesized zinc aluminosilicates affecting their catalytic properties in propane conversion into aromatic hydrocarbons were established.