CHABAZITE-TYPE ZEOLITE AND METHOD FOR PRODUCING THE SAME, LOW-SILICA ZEOLITE HAVING COPPER SUPPORTED, NITROGEN OXIDE REDUCTION REMOVAL CATALYST INCLUDING THE ZEOLITE, AND METHOD FOR REDUCTION REMOVING NITROGEN OXIDE USING THE CATALYST

摘要

PROBLEM TO BE SOLVED: To provide a chabazite-type zeolite having a high Al content as a substrate of a catalyst support or an adsorbent from the standpoint of the number of ion exchange sites or the solid acid amount, and having high durability and heat resistance; a method for producing the same; and a new chabazite-type zeolite having copper supported.

SOLUTION: In the chabazite-type zeolite, the mole ratio of SiO2/Al2O3is less than 15 and the average particle diameter is ≥1.0 and ≤8.0 μm. The chabazite-type zeolite has excellent durability and heat resistance. In the chabazite-type zeolite having copper supported, the rate of reduction of the nitrogen oxide at low temperature is improved compared to the conventional chabazite-type zeolite having copper supported.

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