Sulfuric Acid | Wet gas Sulfuric Acid (WSA)

The WSA process is a wet gas catalytic process. The concentrated sulfuric acid is produced by condensation from a wet process gas. Drying of the process gas prior to treatment in a WSA plant, therefore, becomes superfluous, hence generation of wastewater and loss of sulfur are avoided. The purpose of the first step in the process is to produce an SO2 gas at the operating temperature of the oxidation catalyst in the SO2 converter. If the sulfur in the feed is SO2, only a simple preheating is required. Other sulfurous feeds are oxidized to SO2 by combustion and then cooled to the optimum catalytic conversion temperature in a waste heat boiler. The excess heat from this operation is recovered as steam. The catalytic conversion of SO2 to SO3 takes place in one or more catalyst beds. Reaction heat is recovered between the catalyst beds by superheating of steam. After the last conversion step, the gas is cooled and the SO3 reacts with water vapor to form gas-phase sulfuric acid. The process gas is finally cooled by a countercurrent flow of air in the proprietary WSA condenser. Clean gas exits at the top of the WSA condenser and the sulfuric acid is collected in the bottom section from where it is cooled and sent to storage. Hot air generated in the WSA condenser may be used as preheated combustion air to ensure optimal energy efficiency.

VK-WD

VK-WD is optimized for lean SO2+SO3 gases, such as in a SNOX™ plant or in the bed(s) after the ...

VK-WH

VK-WH is a cesium-promoted catalyst designed for continuous operation down to 370°C/700°F in ...

VK-WL

VK-WL is a cesium-promoted catalyst designed for continuous operation down to 370°C/700°F in lean ...

VK-WSA

The VK-WSA formulation offers excellent activity over a wide range of operating conditions and can ...

VK-WSX

The VK-WSX formulation was developed to offer higher activity in SO2 gasses that are more than 90% ...

Integrated Sulfuric Acid Concentrator (ISAC)

The ISAC is a small, packed column placed underneath the WSA condensers in WSA and SNOX™ plants. ...

Sulfur Oxides Low VElocity filter (SOLVE)

The SOLVE filter is a special acid mist filter with an injection of hydrogen peroxide solution that ...

Sulfuric acid condenser

The WSA condenser in WSA and SNOX™ plants cools the process gas with atmospheric air, typically ...

Sulfuric acid cooling System

The acid cooling system of WSA and SNOX™ The acid cooling system of WSA and SNOX™ plants performs a ...

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