Effect of Precious Metals on NO Reduction by CO in Oxidative Conditions

Applied Sciences

Pirault-Roy Laurence¹  DamienP. Debecker²  François Devred²  Stéphane Siffert³  Joudia Akil³  Renaud Cousin³  Christophe Poupin³ 

[1] Institute of Chemistry of Poitiers, Materials and Natural Resources (IC2MP) UMR-CNRS 7285, University of Poitiers, 4, rue Michel Brunet (Bât B27), 86073 Poitiers Cedex, France;Institute of Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain, Place Louis Pasteur, 1, Box L4.01.09, 1348 Louvain la-Neuve, Belgium;Unité de Chimie Environnementale et Interactions sur le Vivant, UR 4492, UCEIV, Univ. Littoral Côte d’Opale, 149 Avenue Maurice Schumann, 59140 Dunkerque, France;

关键词: environmental chemistry;    oxyfuel combustion;    NO-CO reaction;    heterogeneous catalysis;   

DOI  :  10.3390/app10093042

来源: DOAJ

【 摘 要 】

Carbon dioxide has become an environmental challenge, where the emissions have reached higher level than can be handled. In this regard, conversion of CO₂ to value-added chemicals and thus recycling of CO₂ appear a viable option. Prior to valorization, CO₂ must be purified. Among several opportunities, oxyfuel combustion is a process in rapid development. However, the gases resulting from this process contain some traces of impurities that can hinder the recovery of CO₂ such as NO and CO. This work has, therefore, focused on the study of the NO-CO reaction in an oxidizing medium, using heterogeneous catalytic materials based on various supported noble metals. These materials were extensively characterized by a variety of methods including Brunauer–Emmett–Teller (BET) surface area measurements, hydrogen chemisorption, transmission electron microscopy (TEM) and H₂ temperature programmed reduction (H₂-TPR). The results obtained show that the catalytic behavior of M/Al₂O₃ catalysts in CO oxidation and NO reduction with CO in oxidative conditions depends mainly on the nature of the metal. The best result for both reactions is obtained with Pt/Al₂O₃ catalyst. The Pt nanoparticles in their metallic form (Pt°) as evidenced by TPR could explain the activity.

【 授权许可】

Unknown