Downstream continuous catalyst regeneration

The process is continuous, very low in operating costs. Catalyst is regenerable. However, such plants are much more capital intensive and will call for much higher cresols production. These plants will be attractive only if a few downstream derivatives based on pure meto-cresol and para-cresol (if cresols are separated) apart from BHT are integrated with the mother plant. 

The continuously regenerating trap (CRT) system (by Johnson Matthey) con-skts of a DPF filter located downstream of a Pt-containing DOC catalyst. CO and HC are oxidized in the DOC, which ako oxidizes NO to NO2. NO2 k much more active in its oxidizing reactions than NO and O2 and reacts rapidly with the soot and initiates its ignition. 

---