MnOx supported on metallic monoliths for the combustion of Volatile Organic Compounds

AGUERO FABIOLA N; BARBERO BIBIANA P.; COSTA ALMEIDA, L.; MONTES, M.; CADUS LUIS E.

CHEMICAL ENGINEERING JOURNAL

ELSEVIER SCIENCE SA

Año: 2011 vol. 166 p. 218 - 223

1385-8947

The mostconvenientwaytopreparestructuredmanganeseoxidecatalystforthecombustionofvolatile organic compoundswasstudied.Thepreparationconditions(solidconcentrationintheslurry,theaddi- tion ofasuspensionstabilizer,andtheimmersionnumbers)werestudied.Thecatalyticpropertiesof these catalystswereevaluatedinethanol,ethylacetateandtoluenecombustion.Thesurfaceareaand the catalyticactivityofmonolithsinVOCscombustionincreasedwiththeamountofcatalystretained. A highercatalystloadingandamorehomogeneousandwelladheredlayerwasobtainedusinga30wt% solid contentsuspensionandperformingtwoimmersions.TheadditionofNyacol® is notnecessaryto improve thestabilityofsuspensionsbecausethesearestablebythemselves.Thewashcoatingofmono- liths witha –-Al2O3 suspended inmanganeseacetatesolutionnotonlyreducesthenumberofstages during thepreparationprocedurebutalsoproducesmoreactivecatalysts.