4.6 Review

An Application of Steady-state Isotopic-transient Kinetic Analysis (SSITKA) in DeNOx Process

期刊

CHEMCATCHEM
卷 13, 期 3, 页码 818-827

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202001317

关键词

DeNO(x); isotopes; SSITKA; DRIFTS; reaction mechanisms

资金

  1. Projekt DEAL

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This review provides an overview of the application of steady-state isotopic transient kinetic analysis in the selective catalytic reduction of NOx, focusing on identifying active species in different SCR reactions. It discusses the formation rates of adsorbed species and their role in elementary steps on the catalyst's surface, emphasizing on the optimization and design of industrial catalysts.
This Minireview presents an overview of the advancement and capabilities of the steady-state isotopic transient kinetic analysis in the selective catalytic reduction of NOx. Firstly, a brief overview of the method and the kinetic parameters of catalyst-surface reaction intermediates, including concentration and coverage of surface intermediates, surface residence time and intrinsic turnover frequency (TOF), is provided. Furthermore, the focus is on the application of SSITKA or a unique combination of SSITKA-DRIFTS for the identification of active and/or inactive (spectators) species in NH3-SCR, H-2-SCR and HCs-SCR. Different forms of adsorbed species and their formation rates revealing the main elementary steps on the catalyst's surface involving labeled molecules are discussed. The emphasis is laid on the optimization and design of industrial catalysts.

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