| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 75117 | Microporous and Mesoporous Materials | 2011 | 6 Pages |
The influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA type zeolite was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions. Pure and highly crystalline CHA type zeolites with a wide range of Si/Al ratios were obtained in a shorter crystallization time as compared with those obtained without seed crystals. Furthermore, we achieved the first successful synthesis of high-silica CHA type zeolite in the absence of Na+ cations by increasing the seed content. The protonated CHA type zeolite with a Si/Al ratio of ca. 15 yielded the highest propylene yield of ca. 48 C-% in ethanol conversion into light olefins.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Influence of seeding on FAU–CHA interzeolite conversion was investigated. ► The range of Si/Al ratios and crystallization rate of CHA type zeolite were improved. ► Na+ cation-free CHA type zeolite was synthesized. ► A maximum propylene yield of ca. 48 C-% in ethanol conversion was achieved.
