Contact Process SO₂ Oxidation

2SO2 + O2 ⇌ 2SO3

Genel Bakış

Sulfur dioxide is oxidized to sulfur trioxide over a vanadium pentoxide catalyst in the contact process for sulfuric acid manufacture. Sulfur changes from +4 to +6 oxidation state. The equilibrium is favored by low temperature but requires high temperature for adequate reaction rate, so 400-450 C with V₂O₅ catalyst provides optimal yield.

Katılımcılar

Rol Madde Katsayı Hal
Reaktan Oxygen O 1 (g)
Reaktan Sulfur Dioxide SO₂ 2 (g)
Ürün Sulfur Trioxide SO₃ 2 (g)

Günlük Örnek

Sulfuric acid produced by this process is the world's most produced chemical, used in everything from fertilizers to batteries to detergents.

Endüstriyel Önemi

The contact process produces over 260 million tonnes of sulfuric acid annually. V₂O₅ catalyst replaced the original, more expensive platinum catalyst.

Özellikler

Tür
Redox
Geri Dönüşümlü
Evet
Enerji
Ekzotermik
ΔH
-198,0 kJ/mol
Katalizör
Vanadium(V) oxide (V₂O₅)

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Frequently Asked Questions

What is the equation for Contact Process SO₂ Oxidation?
The balanced equation is: 2SO₂ + O₂ ⇌ 2SO₃.
What type of reaction is Contact Process SO₂ Oxidation?
Contact Process SO₂ Oxidation is a redox reaction. It is reversible under certain conditions.
Is Contact Process SO₂ Oxidation exothermic or endothermic?
Contact Process SO₂ Oxidation is exothermic (releases energy). The enthalpy change (ΔH) is -198.0 kJ/mol.
What conditions are needed for Contact Process SO₂ Oxidation?
This reaction requires a catalyst (Vanadium(V) oxide (V₂O₅)).