Effect of Textural Properties of Y, ZSM-5 and Beta Zeolites on Their Catalytic Activity in Catalytic Cracking of a Middle Distillate Cut Named RCD

Document Type : Research Paper

Authors

1 Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran

2 Buin Zahra Higher Education Center of Engineering and Technology, Imam Khomeini International University, Qazvin, Iran

Abstract

In the present study, performance of three catalysts containing Y, ZSM-5 and Beta zeolite in the catalytic cracking of a kind of middle distillate cut named ”RCD” has been studied. The catalysts were characterized by XRD, FTIR, SEM, N2 adsorption/ desorption and NH3-TPD techniques. Furthermore, deactivated catalysts in terms of type and amount of deposited coke were analysed. Results of catalytic tests showed that Y zeolite performed better and it decreased viscosity and density of liquid product by 35% and 3% respectively. This good operating was due to the high surface area (812m2/gr) and higher acidic sites amounts(1.8 mmol NH3/gr) which gives the heavy molecules better accesibility to active acid sites .But more cokes have deposited on Y zeolite which was 50% lower for Beta and ZSM-5 zeolites. Finally, it can be concluded that the ultimate performance of catalysts in catalytic cracking is influenced by the synergetic effects between the pore structure and acidity.

Keywords

Journal of Oil, Gas and Petrochemical Technology
Volume 8, Number 2
December 2021
Pages 60-74

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