Overall
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received January 9, 2025
Revised February 13, 2025
Accepted March 8, 2025
Available online September 25, 2025
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Most Cited
Effect of Si/Al 2 Ratio Over Zeolite Beta in Steam and Direct Catalytic Cracking of n- dodecane
https://doi.org/10.1007/s11814-025-00467-4
Abstract
To achieve a higher light olefi n yield for the catalytic cracking of kerosene and diesel, the eff ect of the Si/Al 2 ratio (SAR)
of zeolite beta (BEA) in steam catalytic cracking (SCC) and direct catalytic cracking (DCC) of n- dodecane ( n- C12) was
investigated in a fi xed bed reaction system over zeolite beta with SAR in a range of 25–360. The catalysts were characterized
by XRD, NH 3 -TPD, pyridine FT-IR, N 2 -sorption, SEM, and TGA. In both DCC and SCC, n- C12 conversion showed a
tendency to decrease linearly as the BA (Brønsted acidity) of the zeolite beta catalyst increased. Both the light olefi n yield
and the light olefi n/paraffi n ratio in SCC were higher than that in DCC, where the steam in SCC acts as a diluent, thereby
decreasing the partial pressure of the reactants and reducing the formation of paraffi ns. Through optimization of the operation
variables, light olefi n yield exceeding 74.3 wt% was obtained in SCC using high silica zeolite beta catalysts with SAR = 300
at TOS = 1 h, 650 °C, and 4.2 h −1 .
