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Investigation of Iron Vanadates for Simultaneous Carbon Soot Abatement and NH3-SCR

Dipartimento Politecnico di Ingegneria e Architettura, Università degli Studi di Udine, via Cotonificio 108, 33100 Udine, Italy
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Catalysts 2018, 8(4), 130; https://doi.org/10.3390/catal8040130
Received: 7 March 2018 / Revised: 22 March 2018 / Accepted: 22 March 2018 / Published: 26 March 2018
(This article belongs to the Special Issue Selective Catalytic Reduction of NOx)
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Abstract

FeVO4 and Fe0.5Er0.5VO4 were prepared and loaded over standard Selective Catalytic Reduction (SCR) supports based on TiO2-WO3-SiO2 (TWS) and redox active supports like CeO2 and CeZrO2 with the aim of finding a suitable formulation for simultaneous soot abatement and NH3-SCR and to understand the level of interaction between the two reactions. A suitable bi-functional material was identified in the composition FeVO4/CeZrO2 where an SCR active component is added over a redox active support, to increase carbon oxidation properties. The influence of the presence of ammonia in soot oxidation and the effect of the presence of soot on SCR reaction have been addressed. It is found that the addition of NO and NO/NH3 mixtures decreases at different levels the oxidation temperature of carbon soot, while the presence of carbon adversely affects the NH3-SCR reaction by increasing the oxidation of NH3 to NO, thus lowering the NO removal efficiency. View Full-Text
Keywords: NH3-SCR; soot oxidation; de-soot/deNOx; FeVO4; Titania; Ceria NH3-SCR; soot oxidation; de-soot/deNOx; FeVO4; Titania; Ceria
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Casanova, M.; Colussi, S.; Trovarelli, A. Investigation of Iron Vanadates for Simultaneous Carbon Soot Abatement and NH3-SCR. Catalysts 2018, 8, 130.

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