Past and Present in DeNOx Catalysis:

Past and Present in DeNOx Catalysis: From Molecular Modelling to Chemical Engineering, Volume 171
Past and Present in DeNOx Catalysis:From Molecular Modelling to Chemical Engineering, Volume 171 (Studiesin Surface Science and Catalysis) (Studies in Surface Science andCatalysis)  

Past and Present in DeNOx Catalysis: From Molecular Modellingto Chemical Engineering, Volume 171 (Studies in Surface Science andCatalysis) (Studies in Surface Science and Catalysis)
By Pascal Granger, Vasile Pârvulescu
Publisher: Elsevier Science
Number Of Pages: 418
Publication Date: 2007-11-08
ISBN-10 / ASIN: 0444530584
ISBN-13 / EAN: 9780444530585
Binding: Hardcover

This book offers an overview of the state of the art in thefield of DeNOx catalysis in order to focus novel orientations, newtechnological developments, from laboratory to industrial scale. Aparticular attention has been paid towards the implementation ofcatalytic processes for minimising NOx emissions either from stationaryor mobile sources under lean condition to meet future standardregulations of NOx emissions. In the first part of this book, criticalaspects reported in the literature which usually make difficult theachievement of efficient catalytic technologies in those conditions aresummarised and analysed in order two separate new perspectives. Thesecond part deals with fundamental aspects at molecular level. A betterunderstanding of the reactions involved under unsteady-state conditionsis probably a pre-requisite step for improving the performances of theactual processes or developing original ones. The development ofpowerful in situ spectroscopic techniques is of fundamental interestfor kinetic modelling. Correlations between spectroscopic and kineticdata with those obtained from theoretical calculations are reported.Some illustrations emphasise the fact that these comparisons may helpin determining the nature of the catalytic active sites and buildingpredictive tools for simulations under running conditions. The latterpart of this book will be illustrated by different practical approachescovering various aspects related to the catalysts preparation and thedevelopment of alternative technologies which include industrialconsiderations.
- New technological developments for investigating catalyticreactions in transient conditions (in situ and operando spectroscopictechniques)
- Concerted approaches in DeNOx catalysis
- How academic aspects (kinetic, in situ spectroscopic measurements) can provide useful information for practical applications
- Comparison of different approaches provided by academic and industrial partners

PREFACE
Presently, there is a general consensus that heterogeneous catalytic processes play an
important role in environmental issues regarding their high selectivity towards the
removal of undesired side products, such as atmospheric pollutants, in comparison with
that obtained from non-catalysed processes. However, such a benefit could be disputed in the future with the implementation of severe restrictions on standard emission
of those atmospheric pollutants, particularly nitric oxide, which is a very challenging
aspect.
Nowadays, the pressure to develop more efficient, environmental-friendly propulsion
systems for light and heavy vehicles has dramatically increased. In this particular context,
lean-burn engines, integrating both low consumption and low CO 2 emission, is a suitable
technology. Such systems are already recognised for their greenhouse gas behaviour.
However, other atmospheric pollutants are also under concern in those running conditions. Further, technological development towards meeting future standard regulations
regarding NO x is an important issue, because the current three-way technology using
near stoichiometric conditions will be incompetent to meet the changing regulations in
Europe, United States and Japan. Unfortunately, alternative technologies such as the
selective reduction of NO x and the NO x storage reduction catalyst suffer from strong
limitations regarding selective conversion of NO x into nitrogen at low temperature. In
this challenging technological context, car and catalyst manufacturers are stimulated to
develop noble-metal-free catalysts, which probably represent an important breakthrough
both in the conceptual ideas and original systems developed by academia in order to
fulfil future requirements.
Considering the above-mentioned aspects, this book offers in its introduction an
overview of the state of the art in the field of DeNO x catalysis. The comparison of critical
aspects reported in the literature both for stationary and mobile sources could help to
focus on novel orientations and new technological developments. The first part of this
book deals with fundamental aspects at the molecular level. A better understanding of
the reactions involved in unsteady-state conditions is a prerequisite step for improving
the performances of the existing processes or developing new ones. The development of
powerful in situ spectroscopic techniques is of fundamental interest in kinetic modelling.
Correlations between spectroscopic and kinetic data with those obtained from theoretical
calculations are also reported. Some illustrations are provided to emphasise the fact
that these comparisons may help in determining the nature of the catalytically active
sites and building predictive tools for simulations under running conditions. The second
part of this book illustrates different practical approaches and aspects related to catalyst
preparation and the development of alternative technologies. This part is strongly related
to industrial considerations, and offers some suggestions for future developments in the
field.
Pascal Granger
University of Lille, France
Unité de Catalyse et de Chimie du Solide
UMR CNRS 8181
59655 Villeneuve d’Ascq, France
Vasile
Pˆ
arvulescu
University of Bucharest, Romania
Department of Chemical Technology and Catalysis,
4-12 Regina Elisabeta Bvd.
Bucharest 030016, Romania

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