Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol
In contrast to high silica zeolites, it is difficult to obtain mesoporosity in zeolites with low Si/Al ratio (e.g., <20) via conventional NaOH-based treatment, making the obtainment of hierarchical zeolites with high acidity a challenging target. In this paper, we report the preparation of hierar...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/3084356 |
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| author | Enrico Catizzone Massimo Migliori Alfredo Aloise Rossella Lamberti Girolamo Giordano |
| author_facet | Enrico Catizzone Massimo Migliori Alfredo Aloise Rossella Lamberti Girolamo Giordano |
| author_sort | Enrico Catizzone |
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| description | In contrast to high silica zeolites, it is difficult to obtain mesoporosity in zeolites with low Si/Al ratio (e.g., <20) via conventional NaOH-based treatment, making the obtainment of hierarchical zeolites with high acidity a challenging target. In this paper, we report the preparation of hierarchical FER-type zeolite at low Si/Al molar ratio (about 10) by postsynthesis etching involving a sequence of three treatments with NaAlO2, HCl, and NaOH solutions and investigate the effect of both NaAlO2 solution concentration and time of treatment on the textural properties. The obtained materials exhibit a mesoporous volume higher than the parent ferrierite with no significant effect on the sample acidity. The catalytic activity of some samples was investigated in vapour-phase methanol dehydration to dimethyl ether, revealing the superiority of hierarchical zeolites in terms of methanol conversion, although the presence of mesopores causes formation of light hydrocarbons at high temperatures. |
| format | Article |
| id | doaj-art-3f236702d0f84e9ba569704ee808fe52 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
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| series | Journal of Chemistry |
| spelling | doaj-art-3f236702d0f84e9ba569704ee808fe522025-02-03T07:24:28ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/30843563084356Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of MethanolEnrico Catizzone0Massimo Migliori1Alfredo Aloise2Rossella Lamberti3Girolamo Giordano4Department of Environmental and Chemical Engineering, University of Calabria, Rende 87036, ItalyDepartment of Environmental and Chemical Engineering, University of Calabria, Rende 87036, ItalyDepartment of Environmental and Chemical Engineering, University of Calabria, Rende 87036, ItalyDepartment of Environmental and Chemical Engineering, University of Calabria, Rende 87036, ItalyDepartment of Environmental and Chemical Engineering, University of Calabria, Rende 87036, ItalyIn contrast to high silica zeolites, it is difficult to obtain mesoporosity in zeolites with low Si/Al ratio (e.g., <20) via conventional NaOH-based treatment, making the obtainment of hierarchical zeolites with high acidity a challenging target. In this paper, we report the preparation of hierarchical FER-type zeolite at low Si/Al molar ratio (about 10) by postsynthesis etching involving a sequence of three treatments with NaAlO2, HCl, and NaOH solutions and investigate the effect of both NaAlO2 solution concentration and time of treatment on the textural properties. The obtained materials exhibit a mesoporous volume higher than the parent ferrierite with no significant effect on the sample acidity. The catalytic activity of some samples was investigated in vapour-phase methanol dehydration to dimethyl ether, revealing the superiority of hierarchical zeolites in terms of methanol conversion, although the presence of mesopores causes formation of light hydrocarbons at high temperatures.http://dx.doi.org/10.1155/2019/3084356 |
| spellingShingle | Enrico Catizzone Massimo Migliori Alfredo Aloise Rossella Lamberti Girolamo Giordano Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol Journal of Chemistry |
| title | Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol |
| title_full | Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol |
| title_fullStr | Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol |
| title_full_unstemmed | Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol |
| title_short | Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol |
| title_sort | hierarchical low si al ratio ferrierite zeolite by sequential postsynthesis treatment catalytic assessment in dehydration reaction of methanol |
| url | http://dx.doi.org/10.1155/2019/3084356 |
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