Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 255, Issue -, Pages 192-199Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2017.07.042
Keywords
Two-stage synthesis; SSZ-13 zeolite; Nanosize; Hydrothermal stability
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Funding
- Chinese Scholarship Council
- Ministry of Education, Culture, Sports, Science and Technology, Japan
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Improving the hydrothermal stability of zeolites promises attractive benefits for catalytic applications, especially in the case of nanosized zeolite. In the present study, a two-stage synthetic method, conducted at low (95 degrees C) and high (210 degrees C) temperatures sequentially, was developed to prepare nanosized SSZ-13 zeolite with enhanced hydrothermal stability. The crystal size was tuned within 50-300 nm by simply controlling the period in either stage. In addition, compared with the microsized counterparts, the nanosized SSZ-13 zeolite showed remarkably enhanced hydrothermal stability with exhibiting equivalent catalytic performance in the selective catalytic reduction of NOx by ammonia (NH3-SCR). The improved hydrothermal stability of nanosized zeolite was due to the structural healing by the high temperature treatment. (C) 2017 Elsevier Inc. All rights reserved.
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