نسیم صبح فردا

What is Sulfur Dioxide?

  • Sulfur dioxide is a combination of oxygen and sulfur.
  • In normal conditions, at normal temperatures and pressures, sulfur dioxide is a colorless gas with a very nasty odor that can cool and compress and turn into a colorless liquid.
  • This gas at a pressure of 1 atmosphere and Its boils at the temperature of  10 C
  • This gas at temperature  -9.75 C Freezes.
  • Liquid sulfur dioxide is heavier than water and in the gas phase, it weighs twice as much as air.
  • It is also non-flammable in any of the liquid and gaseous phases and is stable in a chemical bond.
  • This gas becomes very corrosive to metals in the presence of a very small amount of water, sulfur dioxide, except in the presence of lead, stainless steel 316, and special alloys.
  • The Special glass and plastics are resistant to impure (hydrated) sulfur dioxide.

Available grades:

% 9.99 in the liquid phase

Tanks and maintenance:

  • Sulfur dioxide can be charged in pressurized cylinders.
  • This gas can also be charged and transported in tons of tanks, portable flasks, and cargo tanks.

Compatible and incompatible materials:

  1. In a Short temperature range, carbon steels can be exposed to sulfur dioxide without water.
  2. Sulfur dioxide has moisture, in the presence of corrosive carbon steel.

 

Molecular Weight 64.06
steam pressure 49.1 K. Pa @ 21.1 0C
Gas density 1.261 Kg/m3 @ 0 0C and 1 atm
The latent heat of evaporation at the boiling point  361.5 KJ/Kg
Specific heat capacity at a temperature of 25.0  and 1 atm

CP=0.622 KJ/Kg.0C

CV=0.485 KJ/Kg.0C

CP/CV=1.28

Critical temperature 157.4 0C
Critical pressure 7880 KPa(a)
Solubility in water 22.97 vol.(gas)/Vol.(Water) at 00C and 1 atm
Boiling point -10.0  0C
Explosion / ignition range in air Poison Gas

 

 

Material Compatibility of Sulfur dioxide

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

Viton® Buna-N Neoprene Polyurethane

Updating

Kalrez

GAS Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1079 UN 1079 UN 1079 UN NUMBER
Sulfur dioxide Sulfur dioxide Sulfur dioxide UN SHIPPING NAME
2.3 2.3 2.3 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD
0 0 امتیاز ها
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