TY - JOUR

T1 - Selective Catalytic Reduction of Nitrogen Oxides by Hydrocarbons in an Excess of Oxygen

AU - Sadykov, V. A.

AU - Matyshak, V. A.

N1 - Funding Information: This work was supported in part by the USSR Ministry of Industry and Energy, RAO Unified Energy Systems of Russia, the Russian Foundation for Basic Research, INTAS, and integration project 8.17 of the Presidium of the Russian Academy of Sciences. Publisher Copyright: © 2021, Pleiades Publishing, Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/3

Y1 - 2021/3

N2 - Abstract: An analysis is performed of results from works performed with the active participation of V.V. Lunin on the selective catalytic reduction of nitrogen oxides by hydrocarbons in the presence of an excess of oxygen. The main characteristics of the mechanism of the reactions, which includes the key step of interaction between nitrite–nitrate complexes and hydrocarbons, are determined using a unique set of spectral and kinetic means. This forms the basis for designing active components of catalysts of these processes that ensure high surface coverages by nitrite–nitrate complexes under actual conditions of catalysis, high rates of hydrocarbon activation on such sites, and their effective interaction with the nitrite–nitrate complexes. This is achieved by changing the transition metal cation on the surface of the support, its nearest coordination environment, its degree of clustering, and the basicity of the support. This approach ensures high activity, selectivity, and stability in desirable reactions under actual conditions for active components based on cations of copper, cobalt, nickel, and iron, along with such supports as high-silica zeolites, partially stabilized zirconia, zirconia-pillared natural clays, and framework zirconium phosphates, including ones promoted with silver or platinum. For the practical use of these active components, procedures are developed to deposit them on cellular honeycomb substrates using binders, creating efficient catalysts protected by RF patents.

AB - Abstract: An analysis is performed of results from works performed with the active participation of V.V. Lunin on the selective catalytic reduction of nitrogen oxides by hydrocarbons in the presence of an excess of oxygen. The main characteristics of the mechanism of the reactions, which includes the key step of interaction between nitrite–nitrate complexes and hydrocarbons, are determined using a unique set of spectral and kinetic means. This forms the basis for designing active components of catalysts of these processes that ensure high surface coverages by nitrite–nitrate complexes under actual conditions of catalysis, high rates of hydrocarbon activation on such sites, and their effective interaction with the nitrite–nitrate complexes. This is achieved by changing the transition metal cation on the surface of the support, its nearest coordination environment, its degree of clustering, and the basicity of the support. This approach ensures high activity, selectivity, and stability in desirable reactions under actual conditions for active components based on cations of copper, cobalt, nickel, and iron, along with such supports as high-silica zeolites, partially stabilized zirconia, zirconia-pillared natural clays, and framework zirconium phosphates, including ones promoted with silver or platinum. For the practical use of these active components, procedures are developed to deposit them on cellular honeycomb substrates using binders, creating efficient catalysts protected by RF patents.

KW - cellular honeycomb catalysts

KW - design of catalysts

KW - efficiency and stability

KW - intermediates

KW - mechanism of reactions

KW - mesoporous zirconia

KW - nitrogen oxides

KW - pillared clays

KW - platinum

KW - selective reduction by hydrocarbons

KW - silver

KW - transition metal cations

KW - zeolites

UR - http://www.scopus.com/inward/record.url?scp=85103973476&partnerID=8YFLogxK

U2 - 10.1134/S0036024421030183

DO - 10.1134/S0036024421030183

M3 - Article

AN - SCOPUS:85103973476

VL - 95

SP - 475

EP - 491

JO - Russian Journal of Physical Chemistry A

JF - Russian Journal of Physical Chemistry A

SN - 0036-0244

IS - 3

ER -