Contact Process SO₂ Oxidation

2SO2 + O2 ⇌ 2SO3

概要

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.

参加者

役割 物質 係数 状態
反応物 Oxygen O 1 (g)
反応物 Sulfur Dioxide SO₂ 2 (g)
生成物 Sulfur Trioxide SO₃ 2 (g)

日常の例

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

産業上の重要性

接触法により年間2億6,000万トン以上の硫酸が生産されています。V₂O₅触媒は、もともと使用されていたより高価な白金触媒に代わるものです。

特性

タイプ
Redox
可逆的
はい
エネルギー
発熱性
ΔH
-198.0 kJ/mol
触媒
Vanadium(V) oxide (V₂O₅)

関連する反応

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)).