New method to obtain Al2O3/Al monolith for zeolite coating

OIHANE SANZ; JUAN M. ZAMARO; EDUARDO E. MIRÓ; MARIO MONTES

Sofía, Bulgaria

Congreso; VII European Congress on Catalysis (Europacat); 2005

European Federation of Catalysis Societies (EFCATS)

The most widely used catalytic system in environmental applications is the monolithic reactor. Monoliths offer great advantages over pellet catalysts, the most important one being the low pressure drop associated for high flow rates. The more commonly used monoliths are made of cordierite; nevertheless metallic ones present several advantages: higher mechanical resistance, high thermal conductivity and higher cell density because of lower thickness of the walls. But the preparation of metallic monoliths has a critical point, the adherence of the catalytic coating to the metallic substrate. Several surface treatments of the metals have been proposed to promote this adherence. The aim of this work is to deposit zeolite crystals by the washcoating method onto aluminium monoliths. Anodization, that produces excellent alumina coatings [1], is studied as surface treatment to promote zeolite adhesion.