Hydrogen–Free Processing of Hydrocarbon Raw Materials is the Basis of Technologies for Producing Environmentally Friendly Motor Fuels
Nurzhanova S. Ongarbayev Y. Omarova A. Saidilda G. Annas N.
December 2025Engineered Science Publisher
ES Materials and Manufacturing
2025#30
The stable growth in demand for motor gasoline necessitates the search for new raw material sources to increase motor fuel production, as well as the development of efficient technologies and catalysts. The paper considers the process of hydrogen-free refining of oil fractions on zeolite-containing catalysts. New catalysts modified with metals with variable valence, rare earth metals (REMs) and phosphorus were synthesized. The process was implemented on a laboratory catalytic unit under varying technological parameters. It is shown that the catalytic properties, activity, and selectivity of the synthesized catalysts depend on the nature of the introduced modifiers and the conditions in the process of upgrading of petroleum fractions without hydrogen. The directions of hydrocarbon transformations in the non-hydrogenation upgrading process on zeolite-containing catalysts are discussed. The physicochemical characteristics of zeolite-containing catalysts were studied using electron microscopy and ammonia thermodesorption methods. It has been shown that on the surface of the developed catalysts, acid sites coexist with metallic ones. The acid sites may consist of metals in various oxidation states, fixed both inside the zeolite cavities and on their external surface. It has been established that the catalysts possess multifunctional properties and are capable of simultaneously conducting several reactions: hydrodesulfurization, isomerization, dehydrocyclization.
Activity , Catalyst , Conversion , Hydrogen-free refining , Modification , Selectivity , Zeolite
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D. V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry, 142 Kunaev Street, Almaty, 050010, Kazakhstan
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 71 Al-Farabi Pr., Almaty, 050040, Kazakhstan
D. V. Sokolsky Institute of Fuel
Faculty of Chemistry and Chemical Technology
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