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Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size

To meet the industrial needs for SSZ-13, variable sizes of SSZ-13 with different Si/Al ratios were firstly obtained by conventional hydrothermal synthesis using the seed method. Using a set of characterizations, like X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy...

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Detalles Bibliográficos
Autores principales: Wang, Yibao, Wang, Chen, Wang, Jun, Wang, Jianqiang, Wang, Lei, Xu, Cheng, Shen, Meiqing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7216272/
https://www.ncbi.nlm.nih.gov/pubmed/32295004
http://dx.doi.org/10.3390/ma13081829
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author Wang, Yibao
Wang, Chen
Wang, Jun
Wang, Jianqiang
Wang, Lei
Xu, Cheng
Shen, Meiqing
author_facet Wang, Yibao
Wang, Chen
Wang, Jun
Wang, Jianqiang
Wang, Lei
Xu, Cheng
Shen, Meiqing
author_sort Wang, Yibao
collection PubMed
description To meet the industrial needs for SSZ-13, variable sizes of SSZ-13 with different Si/Al ratios were firstly obtained by conventional hydrothermal synthesis using the seed method. Using a set of characterizations, like X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM), the physicochemical structure and size distribution could be traced. After the specific Si/Al ratio of SSZ-13 zeolites was optimized, synthesized by changing the amounts of structure-directing agents (SDAs) and NaOH, the obtained SSZ-13 showed a high degree of crystallinity. With the limitation of the pH values, the variation of the alkalinity and water content was not helpful to generate different grain sizes of SSZ-13 materials. With the help of ground seed, the various grain sizes of SSZ-13s from 0.4 to 4 μm had a similar degree of crystallinity and size distribution. Moreover, due to the identical intensity of the Al peak in the NMR results, the different grain sizes of SSZ-13s had the same acidity. Our study revealed that using the seed method was an easy and efficient way to synthesize SSZ-13s with different sizes.
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spelling pubmed-72162722020-05-22 Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size Wang, Yibao Wang, Chen Wang, Jun Wang, Jianqiang Wang, Lei Xu, Cheng Shen, Meiqing Materials (Basel) Article To meet the industrial needs for SSZ-13, variable sizes of SSZ-13 with different Si/Al ratios were firstly obtained by conventional hydrothermal synthesis using the seed method. Using a set of characterizations, like X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM), the physicochemical structure and size distribution could be traced. After the specific Si/Al ratio of SSZ-13 zeolites was optimized, synthesized by changing the amounts of structure-directing agents (SDAs) and NaOH, the obtained SSZ-13 showed a high degree of crystallinity. With the limitation of the pH values, the variation of the alkalinity and water content was not helpful to generate different grain sizes of SSZ-13 materials. With the help of ground seed, the various grain sizes of SSZ-13s from 0.4 to 4 μm had a similar degree of crystallinity and size distribution. Moreover, due to the identical intensity of the Al peak in the NMR results, the different grain sizes of SSZ-13s had the same acidity. Our study revealed that using the seed method was an easy and efficient way to synthesize SSZ-13s with different sizes. MDPI 2020-04-13 /pmc/articles/PMC7216272/ /pubmed/32295004 http://dx.doi.org/10.3390/ma13081829 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Yibao
Wang, Chen
Wang, Jun
Wang, Jianqiang
Wang, Lei
Xu, Cheng
Shen, Meiqing
Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size
title Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size
title_full Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size
title_fullStr Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size
title_full_unstemmed Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size
title_short Efficient Hydrothermal Synthesis of SSZ-13 with Variable Grain Size
title_sort efficient hydrothermal synthesis of ssz-13 with variable grain size
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7216272/
https://www.ncbi.nlm.nih.gov/pubmed/32295004
http://dx.doi.org/10.3390/ma13081829
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