Novel Approach for Preparation of Raw Powder Materials toward Flexible Zeolite Synthesis

Abstract

FAU-type zeolites, which are one of large-pore zeolites with 12-membered rings, are widely used industrially as catalysts, adsorbents and separation membranes for various molecules. In general, conventional FAUs are synthesized under hydrothermal synthesis conditions of around 100°C and several days’ heating. In this study, high-silica FAU was succeeded in synthesis under the condition of higher temperature (180°C) and short heating time (3 h) by combining highly reactive dealuminated amorphous matters, prepared by acid-treatment, with a seed-directed approach. In addition, it was found that the obtained FAU-type zeolites have unique Al distribution compared with previous FAUs.