Contract : BRPR CT97 0545 - Project N° : BE97-4471 The potential use of pillared smectite and phosphate catalysts, topologically related congeners MCMs and FSMs, and HSMs (Silica Monoliths), as de-NOx catalysts has been investigated. Over 250 potential de-NOx catalysts have been prepared and characterised via standard methods : XRPD, BET (N2 and Ar) surface area, chemical and AA analysis. The sorption/diffusion properties of selected catalysts have also been measured at varying pressures and temperatures (on in-house assembled instrumentation) as also the surface acidic properties, via NH3-TPD, IR of adsorbed pyridine, isopropanol conversion and flow microcalorimetry. The highest acidities are found in Ga/Alumina-pillared ?-tin phosphates (1000 - 2000 ?mol g-1) although catalytic activity ranges only between 15 - 45 ?mol g-1s-1. SANS (small-angle neutron scattering) XAFS, local geometry spectroscopies (optical/near uv, epr, Mossbauer) and extensive sorption/diffusion measurements on NO and potential poisons (especially water) measured during the project will provide a structural basis for NOx sorption/catalysis in such systems.
New Micro/meso-porous Catalysts for de-NOx Applications
A De Stefanis;
1997
Abstract
Contract : BRPR CT97 0545 - Project N° : BE97-4471 The potential use of pillared smectite and phosphate catalysts, topologically related congeners MCMs and FSMs, and HSMs (Silica Monoliths), as de-NOx catalysts has been investigated. Over 250 potential de-NOx catalysts have been prepared and characterised via standard methods : XRPD, BET (N2 and Ar) surface area, chemical and AA analysis. The sorption/diffusion properties of selected catalysts have also been measured at varying pressures and temperatures (on in-house assembled instrumentation) as also the surface acidic properties, via NH3-TPD, IR of adsorbed pyridine, isopropanol conversion and flow microcalorimetry. The highest acidities are found in Ga/Alumina-pillared ?-tin phosphates (1000 - 2000 ?mol g-1) although catalytic activity ranges only between 15 - 45 ?mol g-1s-1. SANS (small-angle neutron scattering) XAFS, local geometry spectroscopies (optical/near uv, epr, Mossbauer) and extensive sorption/diffusion measurements on NO and potential poisons (especially water) measured during the project will provide a structural basis for NOx sorption/catalysis in such systems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
