REY (Rare Earth Y) zeolite catalyst or REY molecular sieve is a rare-earth-exchanged Y-type zeolite. REY catalyst has the typical FAU crystal structure of Y zeolite, featuring a three-dimensional pore system composed of large supercages connected by twelve-membered oxygen rings. Its pore diameter is approximately 0.74 nm.
REY zeolite catalyst inherits the excellent structural characteristics of Y-type zeolites, including high surface area, large pore volume, uniform pore distribution, and outstanding thermal stability. The incorporation of rare earth ions significantly improves the stability of the zeolite framework by strengthening the interaction between aluminum atoms and the crystal lattice.
Rare earth cations promote the formation and stabilization of stronger Brønsted acid sites while improving acid site distribution within the zeolite framework. This increased acidity enhances catalytic activity for hydrocarbon cracking reactions, enabling more efficient cleavage of large hydrocarbon molecules into valuable lighter products.
REY zeolite catalyst also demonstrates superior catalytic stability and longer service life in industrial applications. The presence of rare earth elements improves resistance to steam deactivation and coke deposition, allowing the catalyst to maintain high activity over extended operating periods.
REY zeolite catalyst is primarily employed as the active cracking component in FCC catalysts for converting heavy crude oil fractions, vacuum gas oil (VGO), atmospheric residue, and other heavy hydrocarbons into lighter and more valuable products. And it remains one of the most widely used and commercially important zeolite materials in the petroleum refining and petrochemical industries.
| Type | REY |
| Apprearance | White powder |
| Relative Crystallinity(%) | ≥50 |
| Surface Area(m2/g) | ≥600 |
| Na2O(%) | ≤0.8 |
| Re2O3(%) | 16.0~19.5 |
| Lattice Collapse Temperature(°C) | >998 |
| Loss On Ignition(wt%) | 5 |
| D50(µm) | 5 |
* Petroleum Fluid Catalytic Cracking
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