Platinum catalysts
C&CS #1394 – Platinum catalyst for SO2 oxidation
This platinum catalyst for the oxidation of SO₂ to SO₃ in the sulfuric acid production process represents a novel and environmentally friendly solution.The platinum-based washcoat
The oxidation of sulfur dioxide (SO₂) to sulfur trioxide (SO₃) is a key step in the contact process for the production of sulfuric acid. In this process, SO₂ is oxidized with oxygen in the presence of a platinum-containing catalyst at elevated temperatures. To achieve a high yield, the reaction is carried out in multiple stages under controlled temperature conditions. The platinum-based washcoat technology developed by P&P Industries ensures a particularly efficient and reliable conversion of SO₂ to SO₃.
The SO₃ produced does not react directly with water, as this would lead to the formation of fine sulfuric acid mist. Instead, it is absorbed in concentrated sulfuric acid, producing oleum (fuming sulfuric acid). This can then be converted to sulfuric acid by dilution with water.
For regeneration, spent sulfuric acid is thermally decomposed, whereby SO₂ is recovered and fed back into the oxidation process. In this way, a closed cycle is enabled, which reduces emissions and makes the process more sustainable.
This platinum catalyst for the oxidation of SO₂ to SO₃ in the sulfuric acid production process represents a novel and environmentally friendly solution.The platinum-based washcoat
