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208639

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Molecular sieves, 13X

beads, 4-8 mesh

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1 KG
$162.00
5 KG
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About This Item

Linear Formula:
Na86[AlO2)86(SiO2)106] · xH2O
CAS Number:
63231-69-6
MDL number:
MFCD00131613
UNSPSC Code:
23201100
eCl@ss:
32110204
NACRES:
NA.21

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beads

Quality Level

100

particle size

4-8 mesh

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General description

Choosing a Molecular Sieve:
1. The preferential adsorption of one molecule over another depends upon pore diameter and mesh size.
2. The dynamic capacity of the silica gel for adsorbing a particular compound is governed by the internal surface area; the greater the surface area, the greater the dynamic capacity.
3. Rate of adsorption and sharpness of resolution are dependent chiefly on particle size and column packing; a fine particle size gives optimum sharpness of resolution.
4. Liquids are most readily adsorbed from solvents in which they are least soluble; a good solvent makes a good desorbing agent.
5. Highly polar liquids are readily adsorbed. Compounds having hydroxyl groups, or containing oxygen are strongly adsorbed.
6. For similar compounds, the higher the molecular weight the higher the selectivity.
7. For hydrocarbons of similar molecular weight, adsorptivity increases with the number of double bonds.
Molecular sieves are crystalline metal aluminosilicates having a three-dimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size. This sodium form represents the basic structure of the type X family, with an effective pore opening in the 910¼ range (for example: it will not adsorb perfluorotributylamine). The 4 to 8-mesh type is normally used in gas-phase applications.
Regeneration or Activation:
A saturated molecular sieve can be restored to its original capacity by regeneration, the principle of which involves changing the conditions surrounding the adsorbent to correspond to a very low equilibrium capacity. In general, the greater the difference between the equilibrium capacities of adsorption and regeneration, the more rapid and complete the regeneration.
The sieve may be regenerated in one of four ways:
1. Thermal reactivation –The maximum regeneration temperature for Silica is 300°C.
2. Pressure reactivation
3. Passing an appropriate fluid through the gel bed at normal temperature and pressure.
4. Displacement of adsorbates by passing a high concentration of molecules in a fluid through the bed.

Application

Molecular sieves, 13X may be used for commercial gas drying, air plant-feed purification (simultaneous water and carbon dioxide removal) and liquid hydrocarbon/natural gas sweetening (hydrogen sulfide and mercaptan removal).
Molecular sievesmay be used as a sorbent during the voltammetric adsorption studies of pure CO2, N2 and H2 (temperature= 25°C and pressure = 300psi).[1] They are widely employed as an adsorbent in adsorption studies.[1][2]

pictograms

Exclamation mark
GHS07

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Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCS2763
MKCR8571
MKCD1674
MKBW1466V
MKBL9112V

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Adsorption of CO2 on molecular sieves and activated carbon.
Siriwardane RV, et al.
Energy and Fuels, 15(2), 279-284 (2001)
Equilibrium adsorption of ethane, ethylene, isobutane, carbon dioxide, and their binary mixtures on 13X molecular sieves.
Hyun SH and Danner RP.
Journal of Chemical and Engineering Data, 27(2), 196-200 (1982)

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