IHI's flue gas NOx removal plant, which is one of the prominent products in the domain of conservation of air quality, is the fruit of extended research and experimentation in IHI Research Institute and Works, as well as tests using actual industrial flue gas. This NOx removal plant incorporates the dry selective catalytic reduction process using ammonia as reducing agent, which is simple yet extremely effective in reducing NOx content.
Since IHI Supplied the first NOx removal plant covering 180,000 Nm3/h flue gas flow in 1978, IHI has been installing a lot of NOx removal plants.

PRINCIPLE OF NOx REMOVAL BY SELECTIVE CATALYTIC REDUCTION

The principle adopted for the NOx removal is the extremely simple process of adding ammonia to flue gas which passes through catalyst layers, by which NOx is decomposed into harmless nitrogen(N2) and steam(H2O):

Special Features

• Easy to operate: No specialized knowledge required for operation.
• Compact design: Low installation cost.
• Perfect matching with flue gas source.
• Catalyst and reactor selectable to suit the gas characteristics.
• Stable supply of catalysts.
• No risk of secondary pollution.