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GEA Bischoff GmbH
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GEA Bischoff - Model DeNOx -Denitrification of Waste Gases

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For the denitrification of waste gases from glass furnaces or fluid catalytic crackers (FCC) plants GEA Bischoff offers the SCR DeNOx process. Selective catalytic reduction (SCR) is considered the most efficient commercially proven method of removing nitrogen oxides (NOx) from off-gases.

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In the SCR DeNOx process the nitrogen oxides (NO2 and NO) are reacting with ammonia (NH3) over a catalyst to form harmless and naturally occurring nitrogen (N2) and water vapor (H2O). The SCR process basically consists of a catalytic reactor and an ammonia storage and injection system. The reducing agent can be either liquid, water-free ammonia under pressure or an aqueous ammonia solution at atmospheric pressure.

A solution of urea can be used as well. In case liquid ammonia is used, the ammonia is votalized and subsequently diluted with air before being injected into the exhaust gas duct.