Assessment on the Effect of Sulfuric Acid Concentration on Physicochemical Properties of Sulfated-Titania Catalyst and Glycerol Acetylation Performance

Mohamad Rasid Shera Farisya and Ramli Irmawati and Ishak Nor Shafizah and Yap, Taufiq Yun Hin and Ernee Noryana Muhamad and Siew, Ling Lee and Nurrulhidayah Salamun (2021) Assessment on the Effect of Sulfuric Acid Concentration on Physicochemical Properties of Sulfated-Titania Catalyst and Glycerol Acetylation Performance. Catalysts, 11. pp. 1-18. ISSN 2073-4344

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URL: https://www.mdpi.com/2073-4344/11/12/1542

Abstract

In this research, a solid acid catalyst was synthesized to catalyze glycerol acetylation into ace tins. The sulphated-Titania catalysts were prepared via the wet impregnation method at different sulfuric acid concentrations (5%, 10%, 15%, and 20%) and denoted as 5SA, 10SA, 15SA, and 20SA, respectively. The synthesized catalysts were characterized using FTIR, XRD, TGA, BET, NH3 -TPD, XRF, and SEM-EDX. The synthesized catalysts were tested on glycerol acetylation reaction at conditions: 0.5 g catalyst loading, 100–120 ◦C temperature, 1:6 glycerol/acetic acid molar ratios, and 2–4 h reaction time. The final product obtained was analyzed using GC-FID. An increment in sulfuric acid concentration reduces the surface area, pore volume, and particles size. However, the increment has increased the number of active sites (Lewis acid) and strong acid strength. 15SA catalyst exhibited excellent glycerol conversion (>90%) and the highest selectivity of triacetin (42%). Besides sufficient surface area (1.9 m² g˗¹) and good porosity structure, the great performance of the 15SA catalyst was attributed to its high acid site density (342.6 µmol g ˗¹) and the high active site of metal oxide (95%).

Item Type:	Article
Keyword:	Glycerol acetylation , Glycerol esterification , Titanium dioxide , solid acid catalyst , Triacetin
Subjects:	Q Science > Q Science (General) > Q1-390 Science (General) Q Science > QD Chemistry > QD1-999 Chemistry
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	30 Mar 2022 13:32
Last Modified:	30 Mar 2022 13:32
URI:	https://eprints.ums.edu.my/id/eprint/32096

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