Application of disordered mesoporous molecular sieve KIT-1 as a support for energy/environmental catalysts

摘要

A disordered mesoporous material, KIT-I was applied as a catalyst support for Ni, Pd and Pt. These catalysts were tested for carbon dioxide reforming of methane, and catalytic combustion of methyl isobutyl ketone and methane, respectively. Ni/Ca/KIT- 1 which contains 10 % Ni with 3% Ca showed conversions approaching equilibrium levels above 650°C and maintained constant activity over 20 h. For methane combustion, Pd impregnated on mesoporous supports showed higher activity than Pd/Al{sub}2O{sub}3, Pd/SiO{sub}2, or Pd/ZSM-5. For methyl isobutyl ketone combustion, Pt supported on mesoporous materials showed light-off temperature lower than other supports by 30-35 °C. It was consistently demonstrated that the large surface area and mesopore structure of M41S type material can result in improvements in catalytic activity as well as enhanced poison resistance in some applications. Long term hydrothermal stability remained to be evaluated.