2-8mm Gamma/Alpha Alumina Raschig Ring Catalyst Support: The High-Efficiency Structured Packing for Advanced Reactor Design
2-8mm Gamma Alumina Alpha Alumina Raschig Alumina Catalyst Support
Product Description
High purity
Good heat resistance
mechanical impact resistance and stable chemical performance
stable and excellent use effect
Raschig alumina catalyst support crystal form: θ-Al2O3 or α- Al2O3.This product is white hollow cylindrical particles, non-toxic, odorless
insoluble in water and ethanol.HL-RRB product is used as catalyst covering support and adsorbent material in the reactor. Its main function is
to increase gas or liquid distribution point and support and protect active catalyst with low strength. It has the characteristics of high purity, good
heat resistance, mechanical impact resistance and stable chemical performance, and is widely used in petrochemical, natural gas, coal chemical
and other industries.
| Brand | Diameter | L.O.I | Water absorption | Radial strength | Specific surface area | Pore volume | Attrition | Bulk density |
| mm | % | % | N/㎝ | m2 /g | ml/g | % | g/ml | |
| AG-FTS01 | 2.0-8.0 | <5.0 | >90.0 | >60.0 | 200-400 | 0.6-0.9 | <5.0 | 0.4-0.6 |
| AG-FTS02 | 2.0-8.0 | <5.0 | >60.0 | >80.0 | 200-300 | 0.4-0.5 | <3.0 | 0.7-0.9 |
| AG-FTS03 | 2.0-8.0 | <5.0 | >60.0 | >100.0 | 200-300 | 0.5-0.6 | <3.0 | 0.6-0.8 |
2-8mm Gamma/Alpha Alumina Raschig Ring Catalyst Support: The High-Efficiency Structured Packing for Advanced Reactor Design
Introduction: Engineering Fluid Dynamics with Hollow Cylinder Geometry
In the sophisticated world of catalytic reactor engineering, optimizing the interaction between process fluids and solid catalysts is paramount. The 2-8mm Gamma (γ) or Alpha (α) Alumina Raschig Ring Catalyst Support introduces a classic yet highly effective geometry—the hollow cylinder—to the realm of catalyst bed structuring. These white, cylindrical particles are engineered as an inert, high-performance catalyst covering support and adsorbent material. Made from thermally stable θ-Al₂O₃ or α-Al₂O₃, Raschig rings excel at enhancing gas and liquid distribution, providing robust mechanical support, and protecting valuable catalysts, making them indispensable in demanding petrochemical, natural gas, and coal chemical processes.
The Raschig Ring Advantage: Optimized Flow and Support
The hollow cylindrical shape (Raschig ring) offers distinct hydrodynamic benefits over solid spheres or pellets:
Maximized Void Fraction & Lower Pressure Drop: The internal hole significantly increases bed porosity, dramatically reducing resistance to fluid flow. This allows for higher throughput or the use of smaller catalyst particles without excessive pressure buildup.
Enhanced Radial Mixing & Distribution: The irregular stacking and internal channels promote turbulent flow and excellent lateral distribution of reactants, preventing channeling and ensuring uniform contact across the catalyst bed.
High Surface-to-Volume Ratio: Provides ample external surface area for preliminary gas-liquid contact and distribution while maintaining structural lightness.
Core Functions in Reactor Systems
This specialized support material serves three critical roles:
Advanced Gas/Liquid Distribution: Positioned in layers, Raschig rings create an unparalleled distribution point, breaking up incoming streams and ensuring even fluid dispersion over the underlying active catalyst bed.
Catalyst Bed Support and Protection: Their high mechanical strength allows them to form a durable, permeable base that supports the catalyst charge and acts as a protective barrier against feed stream erosion, safeguarding catalysts with lower mechanical strength.
Thermal and Chemical Stability: Fabricated from θ or α-alumina, they offer excellent heat resistance and chemical inertness, performing reliably in corrosive and high-temperature environments.
Material Science: θ-Al₂O₃ vs. α-Al₂O₃
Theta-Alumina (θ-Al₂O₃): An intermediate phase offering a balanced combination of moderate surface area (200-400 m²/g) and improved thermal stability over γ-alumina, suitable for many high-temperature support applications.
Alpha-Alumina (α-Al₂O₃): The ultimate stable phase, prized for its exceptional thermal and hydrothermal stability and chemical inertness, used in the most severe process conditions.
Performance-Graded Product Series: AG-FTS01/02/03
We offer three engineered grades to meet specific reactor requirements, all within a 2-8mm diameter range.
| Brand | Key Design Focus | Radial Strength (N/cm) > | Specific Surface Area (m²/g) | Pore Volume (ml/g) | Bulk Density (g/ml) | Attrition (%) < |
|---|---|---|---|---|---|---|
| AG-FTS01 | High Capacity & Surface Area | 60.0 | 200-400 | 0.6-0.9 | 0.4-0.6 | <5.0 |
| AG-FTS02 | High Strength & Density | 80.0 | 200-300 | 0.4-0.5 | 0.7-0.9 | <3.0 |
| AG-FTS03 | Balanced High Performance | 100.0 | 200-300 | 0.5-0.6 | 0.6-0.8 | <3.0 |
Universal Specifications:
Physical Form: White, hollow cylindrical particles (Raschig Rings), non-toxic, odorless, insoluble.
L.O.I. (Loss on Ignition): <5.0%
Water Absorption: >60.0% to >90.0% (grade dependent)
Key Performance Characteristics:
High Purity & Chemical Stability: Ensures no contamination or unwanted catalytic activity.
Superior Mechanical Strength: Radial strength from >60 to >100 N/cm guarantees integrity under load.
Excellent Thermal Resistance: Stable performance in high-temperature reactor environments.
Low Attrition: Minimal dust generation (<3.0-5.0%) preserves bed structure and downstream equipment.
Industry Applications Across the Energy and Chemical Sectors
This versatile Raschig ring support is critical in numerous fixed-bed applications:
Petrochemical Industry: In hydrocracking, hydrotreating, reforming, and alkylation reactors.
Natural Gas Processing: In desulfurization units, mercury removal beds, and dehydration towers.
Coal Chemical & Syngas: In Fischer-Tropsch synthesis reactors, methanol converters, and shift reactors.
Environmental Catalysis: In catalytic oxidizers and SCR (Selective Catalytic Reduction) units for emission control.
Conclusion: The Smart Geometry for Modern Reactor Optimization
The 2-8mm Alumina Raschig Ring Catalyst Support is a testament to the principle that reactor internals design is as crucial as catalyst chemistry. By combining the fluid dynamic advantages of a hollow cylinder with the material excellence of high-purity alumina, this product delivers tangible benefits: reduced energy consumption (lower pressure drop), improved catalyst utilization, extended catalyst life, and more stable reactor operation. For engineers focused on maximizing efficiency and reliability in fixed-bed processes, incorporating this advanced structured packing is a strategic decision for superior reactor performance.