Hamon Research-Cottrell was awarded the supply and installation of a ReACT project by Wisconsin Public Service in 2013. ReACT(Regenerative Activated Coke Technology) is an advanced multipollutant technology that achieves simultaneous capture of SOx, NOx, and mercury in one vessel
1) Adsorption - In the adsorber, flue gas and ammonia pass through a slowly moving bed of activated coke. The activated coke adsorbs SOx and mercury at high efficiency and reduces NOx as a co-benefit.
Activated Coke (AC) is produced from coal and activated by steam. It has high mechanical strength against abrasion and crushing and high specific surface area for adsorption.
2) Regeneration - AC with adsorbed SOx and mercury is conveyed to the regenerator. Here, sulfuric acid or ammonium salts in the AC are thermally desorbed and decomposed to form a sulfur-rich gas steam for by-product recovery by thermal desorption.
After desorption the AC is cooled and passed through a vibrating screen to remove undersized particles. Replacement AC is added to the system, and the regenerated AC returns to the adsorber for use.
3) By-Product Recovery - The sulfur-rich gas from the regenerator is converted into a marketable sulfuric acid.
The ReACT™ system will reduce plant SO2 emissions by more than 90%, mercury by 90% or more, and provide additional cobenefit NOx reduction, while producing approximately 50 MTD of industrial grade sulfuric acid for the market.