Zeolite catalyst USY (Ultra-Stable Y), also known as USY molecular sieve, is a highly dealuminated and thermally stabilized form of Y-type zeolite. USY belongs to the FAU (Faujasite) structural family and retains the characteristic three-dimensional pore network of Y zeolite. It possesses a large pore opening of approximately 0.74 nm and a spacious supercage structure with a diameter of about 1.3 nm.
USY zeolite catalyst exhibits a significantly higher silica-to-alumina ratio due to the partial removal of framework aluminum atoms during dealumination. This structural modification enhances the strength and stability of its acidic sites while greatly improving thermal stability, hydrothermal resistance, and resistance to framework collapse under severe reaction conditions.
USY zeolite catalyst has excellent catalytic cracking performance. Its large-pore FAU structure allows bulky feedstock molecules to access the active sites within the zeolite framework. During catalytic reactions, the strong acidity of USY facilitates the cleavage of carbon-carbon bonds, promoting the conversion of heavy hydrocarbons into valuable light products. USY molecular sieve is the principal active component of modern Fluid Catalytic Cracking (FCC) catalysts and is widely used in refinery units worldwide.
Beyond FCC technology, USY zeolite is also utilized in hydrocracking catalysts, hydroisomerization catalysts, and various petrochemical processes involving hydrocarbon transformation. Its combination of large pore structure, adjustable acidity, and exceptional hydrothermal stability makes it suitable for reactions requiring both accessibility to large molecules and strong catalytic activity.
| Type | USY |
| Apprearance | White powder |
| Relative Crystallinity(%) | >70 |
| Surface Area(m2/g) | >650 |
| SiO2/Al2O3(mol/mol) | Customizable |
| Lattice Collapse Temperature(°C) | >998 |
| Na2O(%) | <0.8 |
| Loss On Ignition(wt%) | 6 |
| D50(µm) | 5 |
* Petroleum Fluid Catalytic Cracking
* Acidic Carriers For Hydrocracking Isomerization Alkylation
* VOC Treatment
Copyright © 2026, Henan Sinmat Chemical Co., Ltd. All rights reserved. | Privacy
