Alumina/silica aerogel with zinc chloride as an alkylation catalyst
The alumina/silica with zinc chloride aerogel alkylation catalyst was obtained using a one step sol-gel synthesis, and subsequent drying with supercritical carbon dioxide. The aerogel catalyst activity was found to be higher compared to the corresponding xerogel catalyst, as a result of the...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2001-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2001/0352-51390110685O.pdf |
| _version_ | 1818560061782360064 |
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| author | Orlović Aleksandar M. Janaćković Đorđe T. Drmanić Saša Marinković Zorica Skala Dejan U. |
| author_facet | Orlović Aleksandar M. Janaćković Đorđe T. Drmanić Saša Marinković Zorica Skala Dejan U. |
| author_sort | Orlović Aleksandar M. |
| collection | DOAJ |
| description | The alumina/silica with zinc chloride aerogel alkylation catalyst was
obtained using a one step sol-gel synthesis, and subsequent drying with
supercritical carbon dioxide. The aerogel catalyst activity was found to be
higher compared to the corresponding xerogel catalyst, as a result of the
higher aerogel surface area, total pore volume and favourable pore size
distribution. Mixed Al-O-Si bonds were present in both gel catalyst types.
Activation by thermal treatment in air was needed prior to catalytic
alkylation, due to the presence of residual organic groups on the aerogel
surface. The optimal activation temperature was found to be in the range
185-225 ºC, while higher temperatures resulted in the removal of zinc
chloride from the surface of the aerogel catalyst with a consequential
decrease in the catalytic activity. On varying the zinc chloride content,
the catalytic activity of the aerogel catalyst exhibited a maximum. High
zinc chloride contents decreased the catalytic activity of the aerogel
catalyst as the result of the pores of the catalyst being plugged with this
compound, and the separation of the alumina/silica support into Al-rich and
Si-rich phases. The surface area, total pore volume, pore size distribution
and zinc chloride content had a similar influence on the activity of the
aerogel catalyst as was the case of xerogel catalyst and supported zinc
chloride catalysts. |
| first_indexed | 2024-12-14T00:33:34Z |
| format | Article |
| id | doaj.art-7341fe1b51f44d429d8000cfe04c55fc |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-14T00:33:34Z |
| publishDate | 2001-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-7341fe1b51f44d429d8000cfe04c55fc2022-12-21T23:24:45ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212001-01-01661068569510.2298/JSC0110685O0352-51390110685OAlumina/silica aerogel with zinc chloride as an alkylation catalystOrlović Aleksandar M.0Janaćković Đorđe T.1Drmanić Saša2Marinković Zorica3Skala Dejan U.4Faculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeCenter for Multidisciplinary Studies, BelgradeFaculty of Technology and Metallurgy, BelgradeThe alumina/silica with zinc chloride aerogel alkylation catalyst was obtained using a one step sol-gel synthesis, and subsequent drying with supercritical carbon dioxide. The aerogel catalyst activity was found to be higher compared to the corresponding xerogel catalyst, as a result of the higher aerogel surface area, total pore volume and favourable pore size distribution. Mixed Al-O-Si bonds were present in both gel catalyst types. Activation by thermal treatment in air was needed prior to catalytic alkylation, due to the presence of residual organic groups on the aerogel surface. The optimal activation temperature was found to be in the range 185-225 ºC, while higher temperatures resulted in the removal of zinc chloride from the surface of the aerogel catalyst with a consequential decrease in the catalytic activity. On varying the zinc chloride content, the catalytic activity of the aerogel catalyst exhibited a maximum. High zinc chloride contents decreased the catalytic activity of the aerogel catalyst as the result of the pores of the catalyst being plugged with this compound, and the separation of the alumina/silica support into Al-rich and Si-rich phases. The surface area, total pore volume, pore size distribution and zinc chloride content had a similar influence on the activity of the aerogel catalyst as was the case of xerogel catalyst and supported zinc chloride catalysts.http://www.doiserbia.nb.rs/img/doi/0352-5139/2001/0352-51390110685O.pdfaerogel catalystfriedel-crafts alkylation catalystsol-gel derived catalyst |
| spellingShingle | Orlović Aleksandar M. Janaćković Đorđe T. Drmanić Saša Marinković Zorica Skala Dejan U. Alumina/silica aerogel with zinc chloride as an alkylation catalyst Journal of the Serbian Chemical Society aerogel catalyst friedel-crafts alkylation catalyst sol-gel derived catalyst |
| title | Alumina/silica aerogel with zinc chloride as an alkylation catalyst |
| title_full | Alumina/silica aerogel with zinc chloride as an alkylation catalyst |
| title_fullStr | Alumina/silica aerogel with zinc chloride as an alkylation catalyst |
| title_full_unstemmed | Alumina/silica aerogel with zinc chloride as an alkylation catalyst |
| title_short | Alumina/silica aerogel with zinc chloride as an alkylation catalyst |
| title_sort | alumina silica aerogel with zinc chloride as an alkylation catalyst |
| topic | aerogel catalyst friedel-crafts alkylation catalyst sol-gel derived catalyst |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2001/0352-51390110685O.pdf |
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