CHABAZITE ZEOLITE CATALYSTS HAVING LOW SILICA TO ALUMINA RATIOS

摘要

Disclosed are zeolite catalysts having the CHA crystal structure with a low silica to alumina ratio, as well as articles and systems incorporating the catalysts and methods for their preparation and use. The catalysts can be used to reduce NOx from exhaust gas streams, particularly those emanating from gasoline or diesel engines.