Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites
Synthetic large-port mordenite samples with different framework SiO 2 /Al 2 O 3 ratios (ranging from 10 to 35) obtained by direct hydrothermal crystallization were studied using different probe molecules. The influence of the framework aluminium content on the BET surface area and the micropore void...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
1998-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/026361749801600703 |
| _version_ | 1826818278339641344 |
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| author | A.A. Shaikh P.N. Joshi H.S. Soni V.P. Shiralkar |
| author_facet | A.A. Shaikh P.N. Joshi H.S. Soni V.P. Shiralkar |
| author_sort | A.A. Shaikh |
| collection | DOAJ |
| description | Synthetic large-port mordenite samples with different framework SiO 2 /Al 2 O 3 ratios (ranging from 10 to 35) obtained by direct hydrothermal crystallization were studied using different probe molecules. The influence of the framework aluminium content on the BET surface area and the micropore void volume in large-port mordenites was examined using low-temperature nitrogen sorption. Sorption uptake using different probe molecules such as water, benzene, n-hexane and cyclohexane was measured on the protonic form of the mordenite samples. The sorption energetics in large-port mordenites as a function of framework SiO 2 /Al 2 O 3 ratio was discussed on the basis of the isotherms for water sorption over the temperature range 303–403 K. The sorption data were analyzed in terms of different models of sorption isotherm equations. The wide variation in the isosteric heats of sorption of polar but amphoteric water molecules exhibited by mordenite samples with different framework Si/Al ratios demonstrate the heterogeneous character of the surface. |
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| id | doaj.art-1210c194ce394497aadc7a98a448f1cd |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2025-02-16T05:49:32Z |
| publishDate | 1998-07-01 |
| publisher | SAGE Publishing |
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| series | Adsorption Science & Technology |
| spelling | doaj.art-1210c194ce394497aadc7a98a448f1cd2025-02-03T10:07:58ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40381998-07-011610.1177/026361749801600703Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port MordenitesA.A. ShaikhP.N. JoshiH.S. SoniV.P. ShiralkarSynthetic large-port mordenite samples with different framework SiO 2 /Al 2 O 3 ratios (ranging from 10 to 35) obtained by direct hydrothermal crystallization were studied using different probe molecules. The influence of the framework aluminium content on the BET surface area and the micropore void volume in large-port mordenites was examined using low-temperature nitrogen sorption. Sorption uptake using different probe molecules such as water, benzene, n-hexane and cyclohexane was measured on the protonic form of the mordenite samples. The sorption energetics in large-port mordenites as a function of framework SiO 2 /Al 2 O 3 ratio was discussed on the basis of the isotherms for water sorption over the temperature range 303–403 K. The sorption data were analyzed in terms of different models of sorption isotherm equations. The wide variation in the isosteric heats of sorption of polar but amphoteric water molecules exhibited by mordenite samples with different framework Si/Al ratios demonstrate the heterogeneous character of the surface.https://doi.org/10.1177/026361749801600703 |
| spellingShingle | A.A. Shaikh P.N. Joshi H.S. Soni V.P. Shiralkar Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites Adsorption Science & Technology |
| title | Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites |
| title_full | Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites |
| title_fullStr | Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites |
| title_full_unstemmed | Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites |
| title_short | Influence of Framework Silica to Alumina Ratio on the Sorption Characteristics of Synthetic Large-Port Mordenites |
| title_sort | influence of framework silica to alumina ratio on the sorption characteristics of synthetic large port mordenites |
| url | https://doi.org/10.1177/026361749801600703 |
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