Synergetic Effect of Tin and Potassium as Modifying Additives on Rhodium Catalysts in the Process of Selective Dehydrogenation of Associated Petroleum Gas
Kadirbekov K.A. Mirzaeian M. Buzayev N.A. Kadirbekov A.K.
July 2025Multidisciplinary Digital Publishing Institute (MDPI)
Catalysts
2025#15Issue 7
This paper presents the results of an investigation into the catalytic activity and selectivity of rhodium-based catalysts supported on natural zeolite clinoptilolite from the Shankanai field (Kazakhstan) in the dehydrogenation of light alkanes from associated petroleum gas (APG). Three modifications of the catalyst have been studied: basic 1%Rh/HCpt, modified with tin 1%Rh/10%SnO/HCpt, and combined with additives of tin and potassium 1%Rh/10%SnO/5%K2O/HCpt. It has been shown that the addition of tin contributes to increased thermal stability and a decreased coking rate, while the addition of potassium suppresses side reactions (cracking and isomerization), increasing the selectivity for olefins. The highest yield of olefins (~30%) is achieved with the 1%Rh/10%SnO/5%K2O/HCpt catalyst in the presence of water vapor. Using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), improved distribution of active components and reduced catalyst deactivation have been confirmed. The obtained data demonstrate the potential of the developed systems for the efficient processing of APG and the selective synthesis of olefins.
associated petroleum gas , catalyst , clinoptilolite (Cpt) , dehydrogenation , zeolite
Text of the article Перейти на текст статьи
Laboratory of Petroleum Chemistry and Petrochemical Synthesis, A.B. Bekturov Institute of Chemical Sciences, Almaty, 050010, Kazakhstan
School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley, PA1 2BE, United Kingdom
Department of Physical Chemistry, Catalysis and Petrochemistry, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
School of Chemical Engineering, Kazakhstan-British Technical University, Almaty, 050005, Kazakhstan
Laboratory of Petroleum Chemistry and Petrochemical Synthesis
School of Computing
Department of Physical Chemistry
School of Chemical Engineering
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026