The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology
Sol-gel/oil-drop granulation technique was used to prepare mesoporous γ-Al2O3 granules of 1.5-2mm with high specific surface area and pore volume of 295m2/g and 0.47 cm3/g, respectively. The structure of granules was studied using powder XRD, DTA, TEM and N2 adsorption/desorption techniques. A respo...
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| Format: | Article |
| Language: | English |
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University of Novi Sad
2022-09-01
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| Series: | Processing and Application of Ceramics |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312203267M.pdf |
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| author | Mohammadi Behnam Shabani Shaghayegh Mirkazemi Seyed Mohammad Vahidshad Yaser Dorani Akram |
| author_facet | Mohammadi Behnam Shabani Shaghayegh Mirkazemi Seyed Mohammad Vahidshad Yaser Dorani Akram |
| author_sort | Mohammadi Behnam |
| collection | DOAJ |
| description | Sol-gel/oil-drop granulation technique was used to prepare mesoporous γ-Al2O3 granules of 1.5-2mm with high specific surface area and pore volume of 295m2/g and 0.47 cm3/g, respectively. The structure of granules was studied using powder XRD, DTA, TEM and N2 adsorption/desorption techniques. A response surface methodology (RSM) holding CCD approach was used for modelling the influence of process variables on the granule pore structure, having a quadratic function relating the independent variables (calcination temperature, acid amount and ammonia concentration) to the responses (specific surface area, mean pore diameter and pore volume). The interaction effect of variables on each response was studied and all were in acceptable accordance with experimental values. Accordingly, the granules synthesized using 20ml of nitric acid, aged in a 9.25wt.% ammonia solution and calcined at 450°C showed the best properties. The predicted values for the specific surface area and pore volume were 315.64m2/g, 7 nm and 0.53 cm3/g, respectively, which were compatible with experimental values. |
| first_indexed | 2024-04-11T19:46:13Z |
| format | Article |
| id | doaj.art-a8263bd428114f45b2b4d9857652506f |
| institution | Directory Open Access Journal |
| issn | 1820-6131 2406-1034 |
| language | English |
| last_indexed | 2024-04-11T19:46:13Z |
| publishDate | 2022-09-01 |
| publisher | University of Novi Sad |
| record_format | Article |
| series | Processing and Application of Ceramics |
| spelling | doaj.art-a8263bd428114f45b2b4d9857652506f2022-12-22T04:06:28ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312406-10342022-09-0116326727510.2298/PAC2203267MThe effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodologyMohammadi Behnam0Shabani Shaghayegh1Mirkazemi Seyed Mohammad2Vahidshad Yaser3Dorani Akram4School of Metallurgy and Materials Engineering, Iran University of Science & Technology (IUST), Narmak, Tehran, IranSchool of Metallurgy and Materials Engineering, Iran University of Science & Technology (IUST), Narmak, Tehran, IranSchool of Metallurgy and Materials Engineering, Iran University of Science & Technology (IUST), Narmak, Tehran, IranSpace Transportation Research Institute, Tehran, IranSpace Transportation Research Institute, Tehran, IranSol-gel/oil-drop granulation technique was used to prepare mesoporous γ-Al2O3 granules of 1.5-2mm with high specific surface area and pore volume of 295m2/g and 0.47 cm3/g, respectively. The structure of granules was studied using powder XRD, DTA, TEM and N2 adsorption/desorption techniques. A response surface methodology (RSM) holding CCD approach was used for modelling the influence of process variables on the granule pore structure, having a quadratic function relating the independent variables (calcination temperature, acid amount and ammonia concentration) to the responses (specific surface area, mean pore diameter and pore volume). The interaction effect of variables on each response was studied and all were in acceptable accordance with experimental values. Accordingly, the granules synthesized using 20ml of nitric acid, aged in a 9.25wt.% ammonia solution and calcined at 450°C showed the best properties. The predicted values for the specific surface area and pore volume were 315.64m2/g, 7 nm and 0.53 cm3/g, respectively, which were compatible with experimental values.http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312203267M.pdfsol-geloil dropγ-aluminaexperimental designmesoporous |
| spellingShingle | Mohammadi Behnam Shabani Shaghayegh Mirkazemi Seyed Mohammad Vahidshad Yaser Dorani Akram The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology Processing and Application of Ceramics sol-gel oil drop γ-alumina experimental design mesoporous |
| title | The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology |
| title_full | The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology |
| title_fullStr | The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology |
| title_full_unstemmed | The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology |
| title_short | The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology |
| title_sort | effects of processing parameters on structure of mesoporous γ alumina granules synthesized by sol gel oil drop method modelling via response surface methodology |
| topic | sol-gel oil drop γ-alumina experimental design mesoporous |
| url | http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312203267M.pdf |
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