Operando Spectroscopic Studies of Cu-SSZ-13 for NH₃-SCR deNOx Investigates the Role of NH₃ in Observed Cu(II) Reduction at High NO Conversions.

ABSTRACT: The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH₃) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH₃-SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH₃-SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH₃ and the Cu cations located in eight ring sites of the bulk of the zeolite and is ind

SUBMITTER: Greenaway AG 

PROVIDER: S-EPMC6413821 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature