Wang, Guanchen and AlMasoud, Najla and Alomar, Taghrid S. and Azman, Yasmin Nadhirah and Maireles-Torres, Pedro and Chia, Stephen and Juan, Joon Ching and Ling, Tau Chuan and El-Bahy, Zeinhom M. and Ng, Eng-Poh (2024) Direct evidence of time-dependent crystallization evolution of SAPO-34 and SAPO-20 zeolites directed by trimethylbenzylammonium hydroxide for microwave-assisted ethanolysis of furfuryl alcohol. New Journal of Chemistry, 48 (15). pp. 6875-6885. ISSN 1144-0546, DOI https://doi.org/10.1039/d4nj00875h.
Full text not available from this repository.Abstract
Time-dependent crystallization evolution for synthesizing SAPO34 and SAPO-20 zeolites from a very active hydrogel is followed and reported where the XRD, FTIR, TGA/DTG, SEM/EDX, N2 adsorption-desorption and TPD-NH3 techniques are used. During the crystallization process, the hydrophobic trimethylbenzylammonium cation (BTMA+) has shown its ability as an effective structure-directing and pore filling agent. The resulting pure SAPO-34 and SAPO-20 show high crystallinity, where SAPO-34 exhibits higher porosity (393 m2 g-1, 0.24 cm3 g-1) and acidity (1.20 mmol g-1) than SAPO-20 (29 m2 g-1, 0.16 cm3 g-1, 0.02 mmol g-1), and these features are highly beneficial in the microwave-assisted ethanolysis of furfuryl alcohol. SAPO-34 shows outstanding catalytic activity (100% conversion, 72.5 +/- 0.3% yield of ethyl levulinate) and its performance is much superior to that of SAPO-20 and other classical catalysts thanks to its medium pore size that induces molecular sieving effect. The spent SAPO-34 catalyst has high recyclability with stable activity, making it a superior and cost-effective catalyst for various selective petrochemical reactions. Time-dependent crystallization evolution for synthesizing SAPO34 and SAPO-20 zeolites from a very active hydrogel is followed and reported where the XRD, FTIR, TGA/DTG, SEM/EDX, N2 adsorption-desorption and TPD-NH3 techniques are used.
| Item Type: | Article |
|---|---|
| Funders: | Princess Nourah bint Abdulrahman University (FRGS/1/2022/STG05/USM/02/12), Ministry of Education, Malaysia (PNURSP2024R18), Princess Nourah bint Abdulrahman University |
| Uncontrolled Keywords: | Selective Catalytic-Reduction; Nanocrystal Growth; Methanol; Parameters; Conversion; Stability; Acidity; Olefins; Layers |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Institute of Biological Sciences Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 21 Oct 2024 03:29 |
| Last Modified: | 21 Oct 2024 03:29 |
| URI: | http://eprints.um.edu.my/id/eprint/45411 |
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