The 13X molecular sieve is the sodium form of zeolite X and has a much larger pore opening than the type A crystals, with an effective pore diameter of 10 angstroms(0.9 nm). It also has the highest theoretical capacity of the common adsorbents and excellent mass transfer rates. Type 13X offers enhanced adsorption performance over the type A zeolite, and it can remove impurities too large to fit into the type A zeolite crystal cages. It is also often used to separate nitrogen from the air to produce a high-purity oxygen stream. Our 13X materials are physically robust and have high adsorption capacity for water, alcohols and other oxygenates, sulfur compounds and carbon dioxide.
13X molecular sieve is used to remove water and CO2 prior the air entering the distillation portion, because low temperatures would cause them to freeze and deposit on the surfaces of equipment.
Synonym: Zeolite 13X, 13X molecular sieve, 13X-APG,13X-HP, BASF 13X Molecular Sieve, CECA Airsiev®, Axens AxSorb 913
Typical Chemical Formula: Na2O . Al2O3 . m SiO2 . n H2O (m < 2.35)
CAS NO.: 1318-02-1
In an Air Separation Unit (ASU), the first step is to remove water, carbon dioxide, nitrogen oxide and traces of hydrocarbons and BOAO 13X molecular sieve with activated alumina combination are used for cryogenic air separation to remove moisture and CO2.
Downstream, the air is processed in a cryogenic distillation column in order to produce highly pure nitrogen (N2), oxygen (O2) and argon (Ar).
BOAO 13X Molecular Sieve for Cryogenic Air Separation has a high dynamics of impurity removal, good adsorption and desorption kinetics, and excellent physical properties. Cryogenic air separation is a method to produce oxygen with a purity greater than 99.9%.
Technical Specifications
Shape | Unit | Bead | Bead | Bead | Pellet | Pellet |
Diameter | mm | 0.4-0.8 | 1.6-2.5 | 3.0-5.0 | 1/16” | 1/8” |
Static H2O Adsorption | wt% | ≥32.00 | ≥29.00 | ≥29.00 | ≥29.00 | ≥29.00 |
Static CO2 Adsorption | wt% | ≥22.0 | ≥20.0 | ≥20.0 | ≥20.0 | ≥20.0 |
Static N2 Adsorption | ml/g | ≥9.0 | ≥8.0 | － | － | － |
N2/O2 Ratio | － | ≥3.5 | ≥3.0 | － | － | － |
Bulk Density | g/ml | ≥0.64 | ≥0.64 | ≥0.64 | ≥0.62 | ≥0.62 |
Crush strength | N/Bead | － | ≥25.0 | ≥50.0 | ≥25.0 | ≥50.0 |
Loss on ignition | wt% | ≤1.50 | ≤1.50 | ≤1.50 | ≤1.50 | ≤1.50 |
Loss on Attrition | wt% | ≤0.20 | ≤0.20 | ≤0.20 | ≤0.30 | ≤0.30 |
Note: based on internal manufacturing’s testing.