Sulfation-Resistant Alumina Catalyst is an activated alumina catalyst formulated for Claus sulfur recovery units where stable catalytic activity and resistance to sulfate-induced deactivation are critical operational requirements.
This product utilizes high-purity activated alumina as the structural base, combining high specific surface area, optimized pore volume, high mechanical strength, and thermal stability to support continuous sweetening and sulfur conversion processes. It is engineered for sulfur recovery units across natural gas processing plants, oil refineries, petrochemical facilities, and coal chemical plants.
Technical Specifications
|
Property |
Typical Specification |
|
Catalyst Type |
Activated alumina Claus catalyst |
|
Main Component |
Al2O3 |
|
Al2O3 Content |
>= 93% |
|
Appearance |
White spherical particles |
|
Particle Size |
Dia 4-6 mm |
|
Specific Surface Area |
>= 300 m2/g |
|
Bulk Density |
0.60–0.80 kg/L |
|
Crushing Strength |
>= 130 N/grain |
|
Pore Volume |
>= 0.40 ml/g |
|
Abrasion Ratio |
<= 1% |
|
Static Water Absorption |
50–70% |
Product Features & Advantages
Advanced Sulfation Resistance: Specially modified active sites effectively inhibit the formation of stable aluminum sulfates on the catalyst surface, extending catalyst lifetime in high-SOx or oxygen-containing sour gas environments.
Optimized Pore Structure: Features a well-balanced macro- and micro-pore distribution that facilitates rapid diffusion of reactant gases (H2S and SO2) and minimizes internal mass transfer limitations.
High Hydrothermal Stability: Maintains structural integrity and resists phase transformation or sintering under severe steam-laden Claus reaction conditions and high-temperature regeneration cycles.
Low Pressure Drop: Uniform spherical particle geometry and smooth surface finish reduce bed resistance, ensuring stable gas throughput and lower blower energy consumption.
Claus Sulfur Recovery Applications
Sulfation-Resistant Alumina Catalyst is deployed in fixed-bed catalytic reactors within industrial sulfur recovery trains:
- Natural gas processing and sweetening plants
- Petroleum refineries (FCC units, hydrotreaters, sour water strippers)
- Petrochemical and chemical synthesis facilities
- Coking and coal chemical processing plants
The material can be applied in primary Claus catalytic stages or combined with specialized titanium-based or promoted catalysts depending on the sulfur recovery configuration and downstream requirements.
Reactor Loading and Bed Configuration Guidelines
Proper installation ensures optimal gas distribution and minimizes channeling across the fixed bed:
Bed Placement
Recommended for primary or secondary Claus catalytic converter beds where baseline activity and sulfation tolerance are prioritized.
Graded Loading
Can be paired with inert support balls at the top and bottom of the reactor bed to support uniform gas flow and prevent catalyst fluidization or pressure drop spikes.
Handling Precautions
Minimize dropping heights during loading to prevent excessive dust or fines generation.
Manufacturing Quality Control
Consistent batch-to-batch performance is essential for stable sulfur recovery operations. Production monitoring covers key physical and chemical metrics:
Purity and carrier composition (Al2O3 content verification)
Surface area and pore distribution analysis
Mechanical strength and abrasion resistance testing
Particle size distribution and bulk density verification
Manufacturing is supported by dedicated testing laboratories and adheres to ISO 9001 quality management standards. Certificate of Analysis (COA) documentation is provided with each commercial shipment.
Packaging and Supply Logistics
Standard Packaging
Jumbo bags, steel drums, or moisture-resistant cardboard buckets.
Minimum Order Quantity
1 metric ton.
Annual Supply Capacity
Approximately 9,500 tons for standard grades.
Lead Time
Standard quantities are processed according to production schedules; specific delivery timelines are confirmed upon order evaluation.
Storage, Handling and Moisture Stability
Activated alumina catalysts require strict environmental protection during international shipping and onsite storage prior to reactor loading.
Moisture Protection: Standard packaging utilizes multi-layer moisture-barrier sealing (such as lined jumbo bags or moisture-resistant steel drums) to prevent premature atmospheric water adsorption during maritime transit and site warehousing.
Crush Resistance During Handling: The mechanical durability of the spherical pellets allows standard pneumatic or gravity-loading equipment to be utilized during reactor turnaround without generating excessive surface dusting.
Shelf Life: When stored in dry, sheltered conditions within original unopened packaging, the physical specifications and catalytic activity remain stable prior to initial activation and commissioning.
FAQ
Q: What is a sulfation-resistant alumina catalyst?
A: It is an activated alumina-based catalyst formulated to inhibit sulfate-induced active site deactivation while sustaining high porosity and surface area for Claus conversion reactions.
Q: Can it replace conventional activated alumina in existing reactors?
A: Yes, provided that the physical size, bulk density, and pressure drop characteristics align with the existing reactor design. Operating data review is recommended prior to switching grades.
Q: What particle sizes are standard?
A: The standard production size is Dia 4-6 mm spherical pellets. Custom particle sizes can be evaluated based on engineering requirements.
Q: How does the catalyst handle thermal regeneration?
A: The high-purity alumina phase maintains structural stability during standard high-temperature air/inert gas stripping cycles used to remove accumulated sulfates and sulfur deposits.
Q: What documentation is supplied with orders?
A: Each batch is accompanied by complete technical documentation, including a Certificate of Analysis detailing surface area, strength, pore volume, and chemical composition.
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