Views: 0 Author: QT Publish Time: 2025-08-26 Origin: QT
Among the family of synthetic zeolites, ZSM-22 (TON framework) occupies a unique niche. Unlike more widely known zeolites such as ZSM-5 or SSZ-13, ZSM-22 features a one-dimensional pore system with 10-membered ring channels (~0.52 × 0.45 nm), making it highly selective in catalytic reactions.
Framework type: TON (International Zeolite Association classification).
Pore system: One-dimensional straight channels.
Si/Al ratio flexibility: Can be synthesized across a broad Si/Al range, affecting acidity and catalytic selectivity.
Crystal morphology: Needle-like crystals that can be shaped into extrudates or pellets for industrial reactors.
Hydroisomerization of Linear Paraffins
ZSM-22 shows excellent selectivity for converting straight-chain hydrocarbons (C5–C7, C10–C14) into branched isomers, improving octane numbers in gasoline or enhancing cold-flow properties in diesel.
(Reference: B. C. Gates, “Catalytic Chemistry,” Wiley, 1992 – description of ZSM-22 activity in paraffin isomerization).
Selective Cracking of Hydrocarbons
The narrow 1D channels suppress undesired secondary reactions, enabling higher yields of targeted olefins and lower coke formation compared to wider-pore zeolites.
Aromatics Transformation & Alkylation
Used in para-xylene maximization and other petrochemical upgrading processes where shape selectivity is critical.
Shape-selectivity: One-dimensional pores provide better control over product distribution.
Lower coke deposition: Compared with ZSM-5, ZSM-22 resists deactivation from coking under prolonged operation.
Thermal stability: Maintains crystallinity and catalytic activity at high reaction temperatures.
Flexibility: Can be tailored by adjusting Si/Al ratio and metal promoters (Pt, Pd, Ni).
At present, ZSM-22 is not yet listed in our standard product catalog. However, our technical team is preparing to launch ZSM-22 (TON) as a new product offering in the near future.
Once released, we will provide:
Full technical specifications (Si/Al ratio ranges, BET surface area, crystallinity data).
Particle size distributions and shaping options (powder, extrudates).
Detailed datasheets and application case studies.
Customers interested in early access or custom ZSM-22 development are welcome to contact us now, so we can provide updates once the product is officially available.
Q1: How does ZSM-22 differ from ZSM-5?
ZSM-22 has a 1D channel structure, while ZSM-5 (MFI framework) has a 3D channel system. This difference leads to higher shape selectivity in ZSM-22 but lower diffusivity compared to ZSM-5.
Q2: Is ZSM-22 suitable for FCC or hydrocracking?
It can be used as an additive for hydroisomerization or selective cracking but is less common in FCC compared to ZSM-5.
Q3: When will your ZSM-22 be available?
We expect to release ZSM-22 with full specifications and datasheets soon. Customers can register interest now to receive technical documentation as soon as it is launched.
