Single and combined deactivating effect of alkali metals and HCl on commercial SCR catalysts (Articolo in rivista)

Type
Label
  • Single and combined deactivating effect of alkali metals and HCl on commercial SCR catalysts (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.apcatb.2004.01.007 (literal)
Alternative label
  • Lisi L., Lasorella G., Malloggi S., Russo G (2004)
    Single and combined deactivating effect of alkali metals and HCl on commercial SCR catalysts
    in Applied catalysis. B, Environmental (Print); Academic Press Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lisi L., Lasorella G., Malloggi S., Russo G (literal)
Pagina inizio
  • 251 (literal)
Pagina fine
  • 258 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 50 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR ISTITUTO DI RICERCA SULLA COMBUSTIONE Enel Produzione Ricerca, Pisa, Italy (literal)
Titolo
  • Single and combined deactivating effect of alkali metals and HCl on commercial SCR catalysts (literal)
Abstract
  • Two commercial SCR catalysts, with a nominal W content of about 9 wt.% and a V nominal content of 0.55 and 1.8 wt.%, respectively, were contacted with different amounts of Na and K and with HCl vapours in order to simulate poisoning by species more specifically contained in exhaust gases from MSW combustion. Catalysts were characterised using XRD analysis, SEM/EDX analysis, BET and pore size distribution measurements, NH3 TPD, TG analysis. Poisoning agents do not cause loss of surface area nor pore occlusion. A significant loss of surface acidity was observed upon alkali metals poisoning whereas a decreasing of vanadium content was observed for the more concentrated catalysts upon HCl poisoning. Catalysts deactivation is proportional to the number of acid sites neutralised by alkali metals adsorbing ammonia in the temperature range typical of SCR process. HCl promotes the formation of new acid sites showing a lower activity compared to the original one. (literal)
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