Bianchi, Enrico

Cristiani, Cinzia

Finocchio, Elisabetta

Groppi, Gianpiero

Latorrata, Saverio

Pollesel, Paolo

Tronconi, Enrico

Visconti, Carlo Giorgio

CRISTIANI, CINZIA

LATORRATA, SAVERIO

VISCONTI, CARLO GIORGIO

BIANCHI, ENRICO

TRONCONI, ENRICO

GROPPI, GIANPIERO

Archivio istituzionale della ricerca - Politecnico di Milano

EUROMAT2013European Congress and Exhibition onAdvanced Materials and Processessociedad española dematerialesmatsocie http:/ /www.euromat2013.fems.euWashcoat deposition of Ni/MgAl2O4 catalysts for steam reforming reaction on  metallic open-cell foams Cinzia Cristiania,1, Elisabetta Finocchiob, Saverio Latorrataa, Carlo Giorgio Viscontic, Enrico Bianchic, Enrico Tronconic, Gianpiero Groppic, Paolo Polleseld  aPolitecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, P.zza Leonardo da Vinci 32, 20133 Milano, Italy bDipartimento di Ingegneria Civile, Chimica e Ambientale, DICCA, P.le Kennedy 1, Università di Genova, 16129 Genova, Italy  cPolitecnico di Milano, Dipartimento di Energia, P.zza Leonardo da Vinci 32,  20133 Milano, Italy dENI Spa, Divisione Refining & Marketing, Via Maritano 26, 20097 San Donato Milanese, Italy cinzia.cristiani@polimi.it  Preparation of active washcoats of Ni/MgAl2O4 steam-reforming catalysts on FeCrAlloy foams is reported in this work. The MgAl2O4 powdered support was prepared via a co-precipitation method, and Ni/MgAl2O4 was obtained via dry impregnation of 10% (w/w) of Ni.  The support geometry determines the washcoating technique, which requires a proper slurry rheology, obtained by proper formulation, while the properties of the final washcoats: loading, thickness and adhesion, depend on the physico-chemical and rheological properties of the suspensions and on the nature of the surface of the geometrical support.  Accordingly, after full characterization of the powders, the deposition of the catalyst over the foams was performed (Figure 1). The washcoat layer can be deposited on FeCrAlloy foams via both dip- and percolation-blowing techniques, however, the highly reproducible percolation-blowing process seems the technique of choice for future industrial applications.  The proportions of the slurry components have been evaluated “a priori” by analyzing pore volume, surface nature and surface charging of the catalyst powders.  Good washcoat loadings can be obtained that result in an acceptable catalytic covering of the metallic foam matrix and in a good adhesion of the active layer. The so prepared catalysts were found to be active in the methane steam reforming process, having performances similar to those reported in the literature for state-of-the-art Ni/MgAl2O4 powdered catalysts, prepared according to different procedures.  Figure 1 – Washcoating procedure  Symposium: C4I- Protective Coatings and Thin Films  Rheological measurementsDeposition: Dip-Blowing or Percolation-BlowingLoadAdhesionWashcoatPowdersFoam pre-treatment:Calcination at 900°C (10h) Determinationof surfacesites and pores volumeSlurry preparation:Powder +   Acid    +  Water+ ball-milling 24 hFlash dryingThermaltreatments

Washcoat deposition of Ni/MgAl2O4 catalysts for steam reforming reaction on metallic open-cell foams

https://re.public.polimi.it/retrieve/handle/11311/971671/73789/euromatAbstract00717.pdf

Washcoat deposition of Ni/MgAl2O4 catalysts for steam reforming reaction on metallic open-cell foams

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