Heat-resistant catalyst carrier moldings and catalysts for combustion.

摘要

The present invention relates to a heat-resistant catalyst carrier or molding thereof comprising silica and alumina, in which the silica content is in a range of 2 % by weight to 30 % by weight, and an overall pore volume is at least 0.3 ml/g and the volume of pores having a diameter of 100 ANGSTROM or larger accounts for at least 60 % of the overall pore volume, or which have a specific surface area of at least 20 m<2>/g after firing at 1200 DEG C in air, or which show a peak area at - 110 ppm to - 130 ppm which is 0 to 10 % with respect to a peak area at - 50 ppm to - 130 ppm, as measured by the nuclear magnetic resonance (<2><9> Si-NMR) method using silicone rubber (- 21.9 ppm) as a reference peak after firing at 500 DEG C in air. By admixture therewith of a metal catalyst there is obtained a catalyst for combustion. The catalyst carriers and moldings can retain large pore volume and specific surface area even upon being held under high-temperature and -humidity conditions over an extended period of time, while the catalysts for combustion can retain high reactivity with reduced or limited deactivation.