contct process Flashcards
1
Q
what raw materials are needed in the contact process?
A
sulfur, air / source of oxygen and water
2
Q
what happens in stage 1?
A
sulfur is burned in oxygen/air to produce sulfur dioxide
3
Q
what happens in stage 2?
A
sulfur dioxide is then reacted with oxygen to produce sulfur trioxide, which is a reversible reaction
4
Q
what are the conditions for the reversible reaction of sulfur dioxide and oxygen
A
a pressure of 2 atm
a temperature of 450C
vanadium oxide catalyst
5
Q
what happens in stage 3?
A
sulfur trioxide is converted to sulfuric acid
6
Q
why is the pressure so low in stage two
A
in the reaction the equilibrium position is already too far to the right so there is no need for high pressures
7
Q
what is added to sulfuric trioxide to for sulfuric acid?
A
H20 (water)
