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An authoritative analysis of molecular sieve 13X adoption across modern cryogenic air separation, clean energy transition, and petrochemical purification.
High-capacity 13X zeolites are indispensable in Air Pre-purification Units (APG) to remove moisture (H₂O) and trace carbon dioxide (CO₂) down to ppb levels prior to cryogenic distillation, protecting cold boxes from ice blockage.
With global decarbonization mandates, 13X synthetic aluminosilicates play a central role in Liquefied Natural Gas (LNG) sweetening plants and blue hydrogen production via H₂S and mercaptan co-adsorption.
Specialized modified 13X (including Lithium-X and 13X-HP variants) are optimized for Pressure Swing Adsorption (PSA) and Vacuum Pressure Swing Adsorption (VPSA) medical oxygen generators and industrial combustion enrichers.
Unlike generic 4A or 5A molecular sieves, Type 13X (Sodium X Faujasite structure) exhibits a substantially larger pore aperture (~10 Angstroms). This allows adsorption of large molecular diameter species such as aromatic hydrocarbons, branched-chain paraffin, organic sulfides, and heavy moisture complexes, making it the supreme adsorbent for critical gas treatment loops.
Comprehensive physical-chemical parameters engineered to withstand thermal stress, high gas velocity, and deep regeneration cycles.
| Parameter Property | Sphere (1.6 - 2.5 mm) | Sphere (3.0 - 5.0 mm) | Pellet (1.6 mm / 1/16") | Pellet (3.2 mm / 1/8") |
|---|---|---|---|---|
| Chemical Formula | Na₂O · Al₂O₃ · (2.8±0.2) SiO₂ · (6-7)H₂O (Sodium Aluminosilicate) | |||
| Nominal Pore Diameter | 10 Å (1.0 nm) - Faujasite Structure | |||
| Bulk Density (g/mL) | 0.68 - 0.74 | 0.66 - 0.72 | 0.64 - 0.70 | 0.62 - 0.68 |
| Crushing Strength (N/particle) | ≥ 35 N | ≥ 85 N | ≥ 30 N | ≥ 60 N |
| Static Water Adsorption (RH 60%) | ≥ 23.5% | ≥ 23.0% | ≥ 23.0% | ≥ 22.5% |
| CO₂ Adsorption Capacity (250 mmHg) | ≥ 18.0% | ≥ 17.5% | ≥ 17.5% | ≥ 17.0% |
| Attrition Rate (% by weight) | ≤ 0.10% | ≤ 0.12% | ≤ 0.15% | ≤ 0.18% |
| Package Moisture Content (% wt) | ≤ 1.0% (Factory Sealed) | |||
| Type | Pore Size | Primary Adsorbed Species | Key Industrial Use Case |
|---|---|---|---|
| 3A Molecular Sieve | ~3 Å | H₂O, NH₃ | Ethanol dehydration, cracked gas drying, insulated glass |
| 4A Molecular Sieve | ~4 Å | H₂O, CO₂, H₂S, SO₂ | Refrigerant drying, closed-loop air drying, solvent dehydration |
| 5A Molecular Sieve | ~5 Å | n-paraffins, C₃-C₄, H₂O | Iso-paraffin separation, PSA hydrogen purification |
| 13X Molecular Sieve | ~10 Å | Aromatics, CO₂, H₂S, Mercaptans, H₂O | Air separation pre-purification, LNG sweetening, VOC capture |
| 13X-HP / Li-X | ~10 Å (Modified) | N₂ (selective over O₂) | Medical & Industrial VPSA Oxygen Concentrators |
Leveraging Pingxiang Pingxiang Zhongtai's advanced production cluster to guarantee strict technical consistency, batch-to-batch stability, and unmatched price competitiveness.
Our facility utilizes digitalized crystallization reactors with closed-loop pressure and temperature regulation. This yields precise NaX crystal lattice structures with maximum surface area and uniform pore size distribution.
Using proprietary inorganic binder formulations and high-shear granulation technology, our 13X beads possess outstanding crush strength (>85N for 3-5mm) and near-zero dusting during vessel loading.
Located in China's industrial chemical ceramics capital (Pingxiang, Jiangxi), our integrated raw material supply chain guarantees rapid production lead times, custom packaging options (jumbo bags, airtight steel drums), and direct ocean freight delivery worldwide.
Maximize bed operational lifespan, minimize pressure drop, and optimize energy efficiency during thermal swing adsorption (TSA) procedures.
To strip adsorbed moisture, CO₂, and hydrocarbons, perform Thermal Swing Adsorption (TSA) following these parameters:
Prevent bed channeling, attrition, and premature breakthrough by adhering to standard loading practices:
In-depth answers curated by senior chemical engineers to assist procurement managers and plant operators.
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