Molecular sieve type 4a is an alkali aluminium silicate. This sodium form of Type- A Crystal Structure has an effective pore opening of about 4 angstroms. The type 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger. Gas molecules like oxygen, nitrogen, carbon dioxide and straight chain hydrocarbon can be adsorbed by 4a.
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Molecular sieve 4a will be the ideal choice in drying of instrumental air drying, naphtha drying, aromatic drying process, hydrocarbons drying process, noble gas drying, natural gas drying and removing of Co2. Drying of liquefied petroleum gas and liquefied natural gas 4A will be the ideal synthetic zeolite.
4a molecule is working on the principle of surface adsorption, it offers a higher surface area for attaining higher adsorption capacity, higher crushing strength of molecular sieve 4a offers low attrition rate and longer working life, for methane adsorption 4a is the best suitable options.
|Size ratio up to grade||%||≥ 98||≥ 98||≥ 96||≥ 96|
|Static H2O Adsorption||%||> 25||> 25||> 25||> 25|
|CO2 Adsorption||NL/g||> 14||> 14||> 14||> 14|
|Packed Moisture Content||%||< 1.5||< 1.5||< 1.5||< 1.5|
|Bulk Density||g/ml||≥ 0.60||≥ 0.60||≥ 0.60||≥ 0.60|
|Wear ratio||%||≤ 0.20||≤ 0.25||≤ 0.20||≤ 0.20|
|Crushing Strength||N||≥ 30||≥ 45||≥ 60||≥ 70|
|H2O Adsorption||%||≥ 20.5||≥ 20.5||≥ 20.5||≥ 20.5|
|Methane Adsorption||%||≥ 16||≥ 16||≥ 16||≥ 16|
|Packed Moisture||%||≤ 1.5||≤ 1.5||≤ 1.5||≤ 1.5|
Type 4a molecular sieve is typically used in regenerable drying systems to remove water vapor or contaminants which have a smaller critical diameter than four angstroms.