Zhongci PSA activated alumina, a specialized form of activated alumina, is widely recognized for its exceptional adsorption and catalytic properties. Derived from aluminum oxide (Al₂O₃), it is primarily utilized in pressure swing adsorption (PSA) systems for gas separation and purification processes. Below is a detailed overview of its key characteristics, applications, and technical specifications.
Key Properties and Composition
Chemical and Physical Attributes
- Molecular Formula: Al₂O₃
- Appearance: White powder with high porosity, ensuring a large surface area for adsorption .
- pH Classification: Available in acidic (pH 4), neutral (pH 7.5), and alkaline (pH 9) types; Zhongci PSA grade is typically alkaline for optimal gas separation efficiency.
- Stability: Insoluble in water, organic solvents, acids, and alkalis; melting point at 2030°C, ensuring thermal stability in industrial processes.
Activation and Performance
- Manufacturing Process: Produced by dehydrating aluminum hydroxide gel at 300–500°C, a method that enhances its porosity and adsorption capacity.
- Activity Control: Its adsorption strength (Brockmann activity) is adjustable by moisture content, ranging from Activity I (highest adsorption) to V (lowest). PSA applications typically require controlled Activity II–III for selective gas adsorption.
Applications in PSA Systems
Gas Separation and Purification
- Hydrogen Purification: Removes moisture, carbon dioxide, and hydrocarbons from hydrogen streams in refineries and chemical plants.
- Natural Gas Processing: Adsorbs water vapor and sulfur compounds to meet pipeline quality standards.
- Air Drying: Dehumidifies compressed air in industrial and medical applications, preventing equipment corrosion.
Catalytic Support
- Serves as a catalyst carrier in dehydration reactions and organic synthesis, leveraging its high surface area for reactive species immobilization.
Technical Specifications (Typical Zhongci Grade)
| Parameter | Value |
|---|---|
| Particle Size | 40–60 mesh (GC grade) |
| Bulk Density | 0.8–1.0 g/cm³ |
| Specific Surface Area | ≥300 m²/g |
| Adsorption Capacity (H₂O) | ≥20% by weight |
| Packing | 15 kg or 500 g containers |
Advantages and Handling Notes
- High Selectivity: Tailored pore structure enables precise separation of target gases (e.g., H₂/CO₂).
- Regenerability: Can be thermally regenerated (150–200°C) for repeated use, reducing operational costs.
- Safety: Non-toxic and chemically inert; stored in dry conditions to maintain activity.
For further technical details or customization options, refer to Zhongci’s product datasheet or contact their technical support team.
