Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol
With the development of large molecule hydrocarbon processes, mesoporous alumina which possesses high surface area with narrow pore size distribution has received a great deal of attention. However, its acid properties lack Bronsted acidity and showed only Lewis acid sites, making it an inactive sol...
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Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia
2008
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| Online Access: | http://eprints.utm.my/3364/ http://eprints.utm.my/3364/1/ZainabRamli2008_ReactivityAndReusabilityOfMesoporousAlumina.pdf |
| _version_ | 1848890555144077312 |
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| author | Chandren, Sheela Ramli, Zainab Hadi Nur, Hadi Nur |
| author_facet | Chandren, Sheela Ramli, Zainab Hadi Nur, Hadi Nur |
| author_sort | Chandren, Sheela |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | With the development of large molecule hydrocarbon processes, mesoporous alumina which possesses high surface area with narrow pore size distribution has received a great deal of attention. However, its acid properties lack Bronsted acidity and showed only Lewis acid sites, making it an inactive solid catalyst in the alkylation of resorcinol, a reaction which requires the usage of solid acid catalysts with both Bronsted and Lewis acidity. In this study, in order to introduce Bronsted acidity to mesoporous alumina, sulfuric acid (H2SO4) and niobic acid (Nb2O5.nH2O) are introduced to the alumina. The reactivity of mesoporous alumina nanoparticles (MAN), Nb2O5.nH2O/MAN and H2SO4/MAN were tested out on the alkylation of resorcinol with methyl tert-butyl ether. No product was obtained using pure MAN, while both H2SO4/MAN and Nb2O5.nH2O/MAN managed to produce butylated resorcinol. Mesoporous alumina nanoparticles incorporated with sulfuric acid produced a greater amount of dibutylated resorcinol, which theoretically is a better antioxidant compared to monobutylated resorcinol. The reusability of the H2SO4/MAN catalyst was also better as dibutylated product was still obtained even in the second use. This indicates that sulfuric acid has created a more stable and also higher strength of Bronsted acidity in alumina as compared to niobic acid |
| first_indexed | 2025-11-15T20:43:56Z |
| format | Article |
| id | utm-3364 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:43:56Z |
| publishDate | 2008 |
| publisher | Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia |
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| spelling | utm-33642010-10-11T05:27:58Z http://eprints.utm.my/3364/ Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol Chandren, Sheela Ramli, Zainab Hadi Nur, Hadi Nur QD Chemistry With the development of large molecule hydrocarbon processes, mesoporous alumina which possesses high surface area with narrow pore size distribution has received a great deal of attention. However, its acid properties lack Bronsted acidity and showed only Lewis acid sites, making it an inactive solid catalyst in the alkylation of resorcinol, a reaction which requires the usage of solid acid catalysts with both Bronsted and Lewis acidity. In this study, in order to introduce Bronsted acidity to mesoporous alumina, sulfuric acid (H2SO4) and niobic acid (Nb2O5.nH2O) are introduced to the alumina. The reactivity of mesoporous alumina nanoparticles (MAN), Nb2O5.nH2O/MAN and H2SO4/MAN were tested out on the alkylation of resorcinol with methyl tert-butyl ether. No product was obtained using pure MAN, while both H2SO4/MAN and Nb2O5.nH2O/MAN managed to produce butylated resorcinol. Mesoporous alumina nanoparticles incorporated with sulfuric acid produced a greater amount of dibutylated resorcinol, which theoretically is a better antioxidant compared to monobutylated resorcinol. The reusability of the H2SO4/MAN catalyst was also better as dibutylated product was still obtained even in the second use. This indicates that sulfuric acid has created a more stable and also higher strength of Bronsted acidity in alumina as compared to niobic acid Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia 2008 Article NonPeerReviewed application/pdf en http://eprints.utm.my/3364/1/ZainabRamli2008_ReactivityAndReusabilityOfMesoporousAlumina.pdf Chandren, Sheela and Ramli, Zainab and Hadi Nur, Hadi Nur (2008) Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol. Journal of Fundamental Sciences, 4 (1). pp. 321-327. ISSN 1823-626X http://jfs.ibnusina.utm.my/index.php/jfs/article/view/42/34 |
| spellingShingle | QD Chemistry Chandren, Sheela Ramli, Zainab Hadi Nur, Hadi Nur Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| title | Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| title_full | Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| title_fullStr | Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| title_full_unstemmed | Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| title_short | Reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| title_sort | reactivity and reusability of mesoporous alumina nanoparticles modified with sulfuric acid and niobic acid in the alkylation of resorcinol |
| topic | QD Chemistry |
| url | http://eprints.utm.my/3364/ http://eprints.utm.my/3364/ http://eprints.utm.my/3364/1/ZainabRamli2008_ReactivityAndReusabilityOfMesoporousAlumina.pdf |