Çıtak, AlimeYavru, Celal AlpÖküzoğlu, R. M.2023-02-032023-02-032017Erdem, B. vd. (2017). ''Preparation, characterization and catalytic properties of SBA-15-SO3H supported tungstophosphoric acid for esterification reaction''. Acta Physica Polonica A, 132(3), Special Issue, Part 2, 1041-1044.0587-42461898-794Xhttps://doi.org/10.12693/APhysPolA.132.1041https://www.webofscience.com/wos/woscc/full-record/WOS:000413982900062http://hdl.handle.net/11452/30826Bu çalışma, 19-24 Ekim 2016 tarihleri arasında Antalya[Türkiye]’da düzenlenen 3. International Conference on Computational and Experimental Science and Engineering (ICCESEN)’da bildiri olarak sunulmuştur.SBA-15-SO3H supported tungstophosphoric acid (TPA, H3PW12O40) mesoporous materials were synthesized by impregnation of TPA into the hydrothermally synthesized SBA-15-SO3H and the catalytic performances were compared for the esterification reaction. The physical and chemical properties of the catalysts were characterized by XRD, SEM/EDX, FT-IR and N-2 adsorption/desorption techniques. The characterization results show that TPA/SBA-15-SO3H retained the typical mesoporous structure of SBA-15-SO3H. The experimental results indicated that TPA/SBA-15-SO3H is a more efficient catalyst than SBA-15-O3H for the esterification reaction. The higher activity of TPA/SBA-15-SO3H compared with that of SBA-15-SO3H was consistent with the material having the low pKa value, confirming that the esterification rate was mostly dependent on the acid strength of the additional functional groups of solid acid catalyst. Accordingly, the reason for the catalytic activity difference was simply explicated by the effect of TPA, having low pKa value, affecting the pore structure and the total acidity.eninfo:eu-repo/semantics/openAccessPhysicsFree fatty-acidsMesoporous materialsBiodiesel productionPerformancePyrolysisEfficientSilicaMcm-41Catalyst activityCatalystsCharacterizationEstersMesoporous materialsCatalytic performanceCatalytic propertiesEsterification reactionsHydrothermally synthesizedMesoporous structuresPhysical and chemical propertiesSolid acid catalystsTungstophosphoric acidEsterificationArticle0004139829000622-s2.0-850333895104110441323, Special Issue, Part 2Physics, multidisciplinary12-Tungstophosphoric Acid; Oxidation; Polyoxometalate I