000134956 001__ 134956 000134956 005__ 20240509150148.0 000134956 0247_ $$2doi$$a10.1007/s11244-013-0004-7 000134956 0248_ $$2sideral$$a81934 000134956 037__ $$aART-2013-81934 000134956 041__ $$aeng 000134956 100__ $$aGálvez, M.E. 000134956 245__ $$aInfluence of the alkali promoter on the activity and stability of transition metal (Cu, Co, Fe) based structured catalysts for the simultaneous removal of soot and NOx 000134956 260__ $$c2013 000134956 5203_ $$aStructured catalysts prepared by means of coating cordierite monoliths with alumina-based suspensions containing transition metals such as Cu, Co and Fe and alkali/alkali-earth promoters such as K and Ba. Textural and structural features of these catalysts were analyzed by means of N2 adsorption and SEM. Their activity in the simultaneous removal of soot and NOx was assayed in a lab-scale installation, using a carbon black as diesel surrogate. Catalysts exhibited significant activity in deNOx and soot oxidation. K and Ba enhanced both NOx adsorption and soot–catalyst contact. However Ba contributed to a greater extent to the adsorption of N-species, which moreover presented higher thermal stability than on K-catalysts, and K showed higher mobility than Ba. Thus, Ba-containing catalysts showed increased activity towards NOx reduction but shifted to higher temperatures in comparison to K-catalysts, which on the other hand resulted more active towards soot oxidation than Ba-ones. Fe-based catalyst turned out to be less active both in soot oxidation and NOx reduction than Co and Cu-based ones. Intensive calcination of the catalysts at 800 °C for 5 h resulted in substantial loss of K and Ba. Loss of promoter depends, however, on the metal contained in the catalyst. In this sense Fe-containing catalysts showed higher stability. Calcination has a substantial effect on catalytic activity. Catalyst significantly lost their NOx adsorption capacity and showed similar activity than a catalyst prepared in absence of promoter, pointing to a substantial change in reaction mechanism and reaction predominantly occurring on metallic sites upon the loss of alkali/alkali-earth compound. 000134956 536__ $$9info:eu-repo/grantAgreement/ES/DGA/GA-LC-030-2008 000134956 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000134956 590__ $$a2.22$$b2013 000134956 591__ $$aCHEMISTRY, PHYSICAL$$b65 / 134 = 0.485$$c2013$$dQ2$$eT2 000134956 591__ $$aCHEMISTRY, APPLIED$$b20 / 70 = 0.286$$c2013$$dQ2$$eT1 000134956 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000134956 700__ $$0(orcid)0000-0003-4202-9437$$aAscaso, S. 000134956 700__ $$aMoliner, R. 000134956 700__ $$aLázaro, M.J.$$uUniversidad de Zaragoza 000134956 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química 000134956 773__ $$g56, 1-8 (2013), 493-498$$pTop. catal.$$tTOPICS IN CATALYSIS$$x1022-5528 000134956 8564_ $$s486796$$uhttps://zaguan.unizar.es/record/134956/files/texto_completo.pdf$$yVersión publicada 000134956 8564_ $$s592375$$uhttps://zaguan.unizar.es/record/134956/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000134956 909CO $$ooai:zaguan.unizar.es:134956$$particulos$$pdriver 000134956 951__ $$a2024-05-09-13:05:46 000134956 980__ $$aARTICLE