Molecular Sieve type 5A is an alkali alumino silicate; it is the
calcium form of the Type A crystal structure. Type 5A has an
effective pore opening of 5 angstroms (0.5 nm). It will adsorb
molecules with a kinetic diameter of less than 5 Angstrom and
exclude those larger.It is especially suitable for PSA adsorber
applications where it may be used for the separation of normal- and
iso- paraffins (C4 to C6 species), in PSA hydrogen purification and
in oxygen concentrators.Typical Chemical Formula0.70CaO 0.30Na2O
Al2O3 2.0SiO2 4.5H2OSiO2: Al2O3 ≈2 Technical Parameter
ItemUnitTechnical
dataShape PelletSphereDiametermm1.5-1.73.0-3.32.0-3.03.0-5.0Size
ratio up to grade%≥98≥98≥98≥98Bulk
densityg/ml≥0.65≥0.65≥0.70≥0.70Wear
ratio%≤0.20≤0.40≤0.20≤0.20Crushing
strengthN≥30/cm≥45/cm≥30/p≥60/pStatic water
adsorption%≥22≥22≥22≥22Water content, as shipped%≤1.5≤1.5≤1.5≤1.5
Application The strong ionic forces of the divalent calcium
ion makes it an excellent adsorbent to remove water, CO2, H2S from
sour natural gas streams, while minimising COS formation. Light
mercaptans are also adsorbed.It is also used for the separation of
normal- and iso paraffins.Production of high purity N2, O2, H2 and
inert gases from mixed gas streams. Regeneration Molecular
sieve Type 5A can be regenerated by either heating in the case of
thermal swing processes; or by lowering the pressure in the case of
pressure swing processes.To remove moisture from a 5A molecular
sieve, a temperature of 250-300°C is required. A properly
regenerated molecular sieve can give moisture dew points below
-100°C, or mercaptan or CO2 levels below 2 ppmv.The outlet
concentrations on a pressure swing process will depend on the gas
present, and on the conditions of the process. Size 5A -
Zeolites are available in beads of 1-2 mm, (10x18 mesh) 2-3 mm,
(8x12 mesh) , 2.5-5 mm, (4x8 mesh) and as powder, and in pellet
1.6", 3.2". AttentionTo avoid damp and pre-adsorption of
organic before running, or must to be reactivated. /* March
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