Synthesis of Nitric Oxide (Ostwald Process Step 1)

4NH3 + 5O2 → 4NO + 6H2O

概要

Ammonia is catalytically oxidized over a platinum-rhodium gauze at 850 C to form nitric oxide and water. This is the first and critical step of the Ostwald process for nitric acid production. The catalyst operates at about 95% selectivity for NO.

参加者

役割 物質 係数 状態
反応物 Ammonia NH₃ 4 (g)
反応物 Oxygen O 5 (g)
生成物 Water H₂O 6 (g)

日常の例

The nitric acid used in fertilizer production and numerous industrial processes begins with this reaction.

産業上の重要性

オストワルト法は世界の硝酸のほぼ全量（年間約6,000万トン）を生産しており、肥料、爆薬、化学合成に不可欠である。

特性

タイプ
Synthesis
可逆的
いいえ
エネルギー
発熱性
ΔH
-905.2 kJ/mol
触媒
Platinum-rhodium gauze

関連する反応

Formation of Calcium Hydroxide Formation of Carbon Monoxide Formation of Nitrogen Dioxide Formation of Potassium Chloride Formation of Sodium Bicarbonate Formation of Sodium Peroxide Formation of Silicon Dioxide Formation of Tungsten Carbide Formation of Copper(II) Sulfide Fischer-Tropsch Synthesis (General)

Frequently Asked Questions

What is the equation for Synthesis of Nitric Oxide (Ostwald Process Step 1)?
The balanced equation is: 4NH₃ + 5O₂ → 4NO + 6H₂O.
What type of reaction is Synthesis of Nitric Oxide (Ostwald Process Step 1)?
Synthesis of Nitric Oxide (Ostwald Process Step 1) is a synthesis reaction.
Is Synthesis of Nitric Oxide (Ostwald Process Step 1) exothermic or endothermic?
Synthesis of Nitric Oxide (Ostwald Process Step 1) is exothermic (releases energy). The enthalpy change (ΔH) is -905.2 kJ/mol.
What conditions are needed for Synthesis of Nitric Oxide (Ostwald Process Step 1)?
This reaction requires a catalyst (Platinum-rhodium gauze).