Hall-Héroult Process (Aluminum Smelting)

2Al2O3 + 3C → 4Al + 3CO2

개요

Alumina (Al₂O₃) is dissolved in molten cryolite (Na₃AlF₆) at 960°C and electrolyzed using carbon anodes. Aluminum is deposited at the cathode and oxygen reacts with the carbon anode to form CO₂. Independently invented by Charles Hall and Paul Héroult in 1886, this process reduced aluminum from a precious metal to a commodity.

참여 물질

역할 물질 계수 상태
반응물 Aluminum Oxide Al₂O₃ 2 (l)
반응물 Carbon C 3 (s)
생성물 Carbon Dioxide CO₂ 3 (g)
생성물 Aluminum Al 4 (l)

일상 속 예시

Every piece of aluminum foil, beverage can, and airplane wing was produced by the Hall-Héroult process.

산업적 중요성

전 세계 알루미늄 생산의 표준 공정으로, 연간 7천만 톤 이상의 알루미늄을 생산합니다. 항공우주, 자동차, 건축, 포장재 산업에 필수적인 금속 생산 기술입니다.

성질

유형
Electrochemical
가역 반응
아니오
에너지
흡열
ΔH
2168.0 kJ/mol
촉매
Cryolite (Na₃AlF₆) solvent

관련 반응

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Hall-Héroult Process (Aluminum Smelting)?
The balanced equation is: 2Al₂O₃ + 3C → 4Al + 3CO₂.
What type of reaction is Hall-Héroult Process (Aluminum Smelting)?
Hall-Héroult Process (Aluminum Smelting) is a electrochemical reaction.
Is Hall-Héroult Process (Aluminum Smelting) exothermic or endothermic?
Hall-Héroult Process (Aluminum Smelting) is endothermic (absorbs energy). The enthalpy change (ΔH) is 2168.0 kJ/mol.
What conditions are needed for Hall-Héroult Process (Aluminum Smelting)?
This reaction requires a catalyst (Cryolite (Na₃AlF₆) solvent).