The chemical coupling between moist CO oxidation and gas-phase potassium sulfation

In the present work, chemical coupling between moist CO oxidation and transformation of gaseous potassium salts (KCl or KOH) in presence absence SO2 was investigated experimentally through kinetic modeling. The experiments were performed a laminar flow quartz reactor at temperatures ranging from 873 to 1473 K. experimental results showed that both KCl KOH inhibited oxidation, but addition reduced inhibiting effect by sulfating potassium. degree sulfation evaluated EDX analysis aerosols collected downstream filter. Also, consumption and, for KCl, formation HCl indications level sulfation. indicated only sulfated small degree, consistent with observation had little on inhibition KCl. Contrary this, captured particles fully according results; however, most surface, forming silicates. interpreted terms model. Thermodynamic data key intermediates re-evaluated ab initio methods mechanism updated recent results. modeling predictions qualitative agreement K/Cl/S strongly overpredicted Analysis calculations indicates pathways model involving KOSO3 contribute overprediction, thermodynamic properties rate constants involve significant uncertainties more work is required resolve discrepancy.