11. Damaging affects on Silicagel Rotors
Some of the following materials and compounds are typical of materials which can solve silicagel
rotors or influence dehumidification negatively.
The sorption rotor should not be moved with air, which is contaminated with these materials or
materials resembling them not even in the lowest concentration. Moreover no particles should be
contained in the air of which the melting temperature is lower than 200°C . They can have permanent
damaging affects on the rotor material and the sorption performance. Mentioned materials are found in
rotor material or the rotor elements and can have the following effects :
● Decrease in performance by blocking of the silicagel pores
Decrease in performance by chemical reaction with the silicagel
Disruption of the mechanical structure of the rotor by strong acids or strong bases.
A) Inorganic Materials ( for instance )
Obs.:
1)
Decreases the internal pore surface of the silicagel, which causes loss in performance.
Nr.
Substancies
chem. Formula
Effects
1
Lithiumchloride
LiCl
Decrease in performance of the silicagel
1)
2
Natriumhydroxide
NaOH
Disruption of the silicagel structure
3
Kaliumhydroxide
KOH
Disruption of the silicagel structure
4
Natriumchloride
NaCl
Decrease in performance of the silicagel
1)
5
Kaliumchloride
KCl
Decrease in performance of th silicagel
1)
6
Kalziumchloride
CaCl
2
Decrease in performance of the silicagel
1)
7
Magnesiumchloride
MgCl
2
Decrease in performance of the silicagel
1)
8
Ammonia
NH
3
Disruption of the silicagel structure
9
Hydrogen fluoride
acid
HF
Disruption of the mechanical firmness of the material of
the rotor
10
Aluminiumchloride
AlCl
3
Decrease in the performance of the silicagel
1)
11
Seawater
Decrease in the performance of the silicagel
1)
12
Vapour of high
temperature
Disruption of the silicagel structure
13
Softening agents
Blocked silicagel pores
14
Strong acids
ph
2...3
Disruption of the firmness of the material of the rotor
15
Bases
ph
7...8
Disruption of the sorption performance of the silicagel
16
Amino acid
R-NH
2
Decrease in the performance of the silicagel
1)
