Direct Synthesis of Aluminosilicate SSZ-39 Zeolite Using Colloidal Silica as a Starting Source

For the first time, SSZ-39 zeolite has been directly prepared using conventional colloidal silica and sodium aluminate instead of using FAU zeolite as the raw material in the alkaline media. The adjustment of the Si/Al ratios in the starting materials to the suitable values is a key factor to prepar...

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Veröffentlicht in:ACS applied materials & interfaces Jg. 11; H. 26; S. 23112
Hauptverfasser: Xu, Hao, Zhang, Juan, Wu, Qinming, Chen, Wei, Lei, Chi, Zhu, Qiuyan, Han, Shichao, Fei, Jinhua, Zheng, Anmin, Zhu, Longfeng, Meng, Xiangju, Maurer, Stefan, Dai, Daniel, Parvulescu, Andrei-Nicolae, Müller, Ulrich, Xiao, Feng-Shou
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States 03.07.2019
Schlagworte:
NH-SCR
zeolite
SSZ-39
design synthesis
conventional sources
ISSN:1944-8252, 1944-8252
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Zusammenfassung:For the first time, SSZ-39 zeolite has been directly prepared using conventional colloidal silica and sodium aluminate instead of using FAU zeolite as the raw material in the alkaline media. The adjustment of the Si/Al ratios in the starting materials to the suitable values is a key factor to prepare the aluminosilicate SSZ-39 zeolite. Various characterizations (for instance, X-ray diffraction, scanning electron microscopy, nitrogen sorption, solid Al NMR, and NH -temperature-programmed desorption) display that the aluminosilicate SSZ-39 zeolite owns high crystallinity, uniform cuboid morphology, large surface area, four-coordinated aluminum species, and strong acidic sites. Inductively coupled plasma analysis shows that the SiO /Al O ratios of the SSZ-39 products are ranged from 12.8 to 16.8. Considering the special framework of the SSZ-39 zeolite, the yield of this synthesis is not higher than 21.3%. Moreover, the catalytic performance of Cu-SSZ-39 catalyst synthesized from this route is excellent in the selective catalytic reduction of NO with NH (NH -SCR).
Bibliographie:ObjectType-Article-1
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content type line 23
ISSN:1944-8252
1944-8252
DOI:10.1021/acsami.9b03048