01886nas a2200277   4500008004100000022001400041245014000055210006900195260007300264300001200337490000700349520085800356653002101214653001601235653002901251653001801280653003401298100001901332700002801351700002301379700002401402700002101426700002501447700001601472856012001488       2012                        eng d  a1566-736700aDeposition-precipitation versus anionic-exchange Au/Al2O3 catalysts: a comparative investigation towards the selective reduction of NOx0 aDepositionprecipitation versus anionicexchange AuAl2O3 catalysts  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a225-2300 v263 a<p>Catalytic properties of supported gold catalysts on gamma-Al2O3 prepared by a conventional deposition-precipitation method were compared with those obtained by anionic-exchange for the reduction of NOx by hydrocarbon under lean conditions that simulate Diesel engine exhaust gas. Interestingly, a catalytic activity enhancement is observed after thermal ageing under reactive conditions at 500 degrees C on anionic-exchanged samples which make them suitable for practical developments. On the other hand, the reverse trend is observed on the solids prepared by deposition-precipitation which deactivate at low temperature. Such changes in catalytic properties have been tentatively explained on the basis of textural and structural modifications taking place during thermal ageing under wet atmosphere. (C) 2012 Elsevier B.V. All rights reserved.</p>10aAnionic-exchange10aAu catalyst10aDeposition-precipitation10aNOx abatement10aSelective catalytic reduction1 aNguyen, D., L.1 aUmbarkar, Shubhangi, B.1 aDongare, Mohan, K.1 aLancelot, Christine1 aGirardon, J., S.1 aDujardin, Christophe1 aGranger, P.  uhttps://library.ncl.res.in/content/deposition-precipitation-versus-anionic-exchange-aual2o3-catalysts-comparative-0