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CHA-Type Zeolite Prepared by Interzeolite Conversion Method Using FAU and LTL-Type Zeolite: Effect of the Raw Materials on the Crystallization Mechanism, and Physicochemical and Catalytic Properties

1
Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
2
Institute of Geology, Mineralogy und Geophysics, Ruhr-University Bochum, 44780 Bochum, Germany
3
Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(10), 1204; https://doi.org/10.3390/catal10101204
Received: 22 September 2020 / Revised: 11 October 2020 / Accepted: 14 October 2020 / Published: 17 October 2020
The effect of the raw materials including parent zeolite as aluminosilicate sources and organic structure-directing agents (OSDAs) on the crystallization mechanism, and physicochemical and catalytic properties of the CHA-type aluminosilicate zeolite was investigated. For this purpose, the FAU-type and the LTL-type zeolites were used as raw material, and trymethyladamantyl ammonium hydroxide and tetraethyl ammonium hydroxide were used as OSDAs. We firstly found that the CHA-type aluminosilicate zeolite was crystallized from the combination of the LTL-type zeolite and tetraethyl ammonium hydroxide as raw materials. The crystallization behaviors were also monitored in detail. The crystallization was delayed by using the LTL-type zeolite as the starting material regardless of the type of OSDA because of the low solubility of the LTL-type zeolite compared to the FAU-type zeolite. We have found that the Al distribution in the CHA framework was dependent on the raw materials. Thus, the prepared CHA-type aluminosilicate zeolite from the LTL-type zeolite exhibited a high thermal stability and catalytic performance in the methanol to olefins reaction. View Full-Text
Keywords: interzeolite conversion method; CHA-type zeolite; LTL-type zeolite; crystallization mechanism; MTO reaction interzeolite conversion method; CHA-type zeolite; LTL-type zeolite; crystallization mechanism; MTO reaction
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Nishitoba, T.; Nozaki, T.; Park, S.; Wang, Y.; Kondo, J.N.; Gies, H.; Yokoi, T. CHA-Type Zeolite Prepared by Interzeolite Conversion Method Using FAU and LTL-Type Zeolite: Effect of the Raw Materials on the Crystallization Mechanism, and Physicochemical and Catalytic Properties. Catalysts 2020, 10, 1204.

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