Contact Process SO₂ Oxidation

2SO2 + O2 ⇌ 2SO3

ภาพรวม

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.

ผู้เข้าร่วม

บทบาท สาร สัมประสิทธิ์ สถานะ
สารตั้งต้น Oxygen O 1 (g)
สารตั้งต้น Sulfur Dioxide SO₂ 2 (g)
ผลิตภัณฑ์ Sulfur Trioxide SO₃ 2 (g)

ตัวอย่างในชีวิตประจำวัน

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

ความสำคัญทางอุตสาหกรรม

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

คุณสมบัติ

ประเภท
Redox
ย้อนกลับได้
ใช่
พลังงาน
คายความร้อน
ΔH
-198.0 kJ/mol
ตัวเร่งปฏิกิริยา
Vanadium(V) oxide (V₂O₅)

ปฏิกิริยาที่เกี่ยวข้อง

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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)).