Effect of CaO on the selective non-catalytic reduction deNO x process: Experimental and kinetic study.

Highlights: [•] CaO catalyzes NH3 decomposition, NO reduction by NH3, and NH3 oxidation by O2. [•] NH3 dissociation to NH2 is the rate-controlling step of NH3 conversion. [•] NH3 conversion on the CaO surface is mainly influenced by O2. [•] The selectivity of NH3 conversion is influenced by both O2 and NO. [•] Mechanism and kinetic model are proposed to describe the CaO-involved SNCR process. [ABSTRACT FROM AUTHOR]