CHABAZITE TYPE ZEOLITE AND PROCESS FOR PRODUCTION THEREOF, COPPER-CARRYING LOW-SILICA ZEOLITE, NOX REDUCTIVE ELIMINATION CATALYST INCLUDING SAID ZEOLITE, AND METHOD FOR REDUCTIVE ELIMINATION OF NOX EMPLOYING SAID CATALYST

摘要

The chabazite-type zeolite of the present invention has a SiO 2 /Al 2 O 3 molar ratio of less than 15, and an average particle size from 1.0 µm to 8.0 µm. The chabazite-type zeolite of the present invention has excellent durability and heat resistance, and the copper- loaded chabazite-type zeolite has an improved NOx reduction rate at low temperatures compared to conventional copper- loaded chabazite-type zeolite.