In Situ Spectroscopic Studies of Proton Transport in Zeolite Catalysts for NH3-SCR
AbstractProton transport is an elementary process in the selective catalytic reduction of nitrogen oxides by ammonia (DeNOx by NH3-SCR) using metal-exchanged zeolites as catalysts. This review summarizes recent advancements in the study of proton transport in zeolite catalysts using in situ electrical impedance spectroscopy (IS) under NH3-SCR reaction conditions. Different factors, such as the metal cation type, metal exchange level, zeolite framework type, or formation of intermediates, were found to influence the proton transport properties of zeolite NH3-SCR catalysts. A combination of IS with diffuse reflection infrared Fourier transformation spectroscopy in situ (in situ IS-DRIFTS) allowed to achieve a molecular understanding of the proton transport processes. Several mechanistic aspects, such as the NH3-zeolite interaction, NO-zeolite interaction in the presence of adsorbed NH3, or formation of NH4+ intermediates, have been revealed. These achievements indicate that IS-based in situ methods as complementary tools for conventional techniques (e.g., in situ X-ray absorption spectroscopy) are able to provide new perspectives for the understanding of NH3-SCR on zeolite catalysts. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Chen, P.; Simon, U. In Situ Spectroscopic Studies of Proton Transport in Zeolite Catalysts for NH3-SCR. Catalysts 2016, 6, 204.
Chen P, Simon U. In Situ Spectroscopic Studies of Proton Transport in Zeolite Catalysts for NH3-SCR. Catalysts. 2016; 6(12):204.Chicago/Turabian Style
Chen, Peirong; Simon, Ulrich. 2016. "In Situ Spectroscopic Studies of Proton Transport in Zeolite Catalysts for NH3-SCR." Catalysts 6, no. 12: 204.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.