Contact Process SO₂ Oxidation

2SO2 + O2 ⇌ 2SO3

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Oxygen O 1 (g)
반응물 Sulfur Dioxide SO₂ 2 (g)
생성물 Sulfur Trioxide SO₃ 2 (g)

일상 속 예시

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

산업적 중요성

접촉 공정은 연간 2억 6천만 톤 이상의 황산을 생산합니다. V₂O₅ 촉매는 원래의 더 비싼 백금 촉매를 대체했습니다.

성질

유형
Redox
가역 반응
예
에너지
발열
ΔH
-198.0 kJ/mol
촉매
Vanadium(V) oxide (V₂O₅)

관련 반응

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

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)).