Catalyst for selectively reducing nitrogen oxides from oxygen-containing exhaust gases
AssigneeMitsubishi Jukogyo Kabushiki Kaisha
InventorsMasumi Atsukawa, Yoshihiko Nishimoto, Naruo Yokoyama, Toshikuni Sera
Life of this patent
Estimating the term…
Abstract
A catalyst for the selective catalytic reduction of nitrogen oxides by the use of ammonia as a reducing agent composed of a catalytically active constituent on a carrier having a honeycomb or parallel plate structure, the carrier being prepared from a slurry of crystallized calcium silicate prepared by mixing silicic acid and lime and heating the mixture under pressure, the calcium silicate having the structure of xonotrite and the formula 6 CaO.6 SiO.sub.2. H.sub.2 O.
Claims6
A catalyst for the treatment of exhaust gases containing soot and dust comprising a catalytically active constituent on a carrier in having a honeycomb or parallel plate structure, said carrier being prepared from a slurry of crystallized calcium silicate prepared by mixing silicic acid and lime and treating the mixture under pressure, said calcium silicate having the structure of xonotrite and the formula:
- 6CaO.6SiO.sub.2.H.sub.2 O.
Dependencies are inferred from the claim text.