Tailoring Properties and Performance of Chromium Oxide based Catalysts for Sorbitol Hydrogenolysis
- Faculty of Applied Sciences, University Technology MARA, Cawangan Johor, Kampus Pasir Gudang, 81750 Masai, Johor, Malaysia
- Department of Chemistry, Faculty of Science, University Technology Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
- Faculty of Applied Sciences, University Technology MARA, 40450, Shah Alam, Selangor, Malaysia
- Industrial Waste Conversion Technology, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia
- Chemical Engineering Studies, College of Engineering, University Technology MARA, Cawangan Johor, Kampus Pasir Gudang, 81750 Masai, Johor, Malaysia
- Fuel Cell Institute, University Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia
- Advanced Biomaterials and Carbon Development Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, 40450, Malaysia
Received: 2025-02-24
Revised: 2025-06-18
Accepted: 2025-10-19
Published in Issue 2025-12-31
Published Online: 2025-11-04
Copyright (c) 2025 Zulaikha Athirah Alexzman, Nurrulhidayah Salamun, Mohd Lokman Ibrahim, Siti Hajar Anaziah Muhamad, Sharifah Najiha Timmiati, Nur Hazirah Ruzali Annuar (Author)

This work is licensed under a Creative Commons Attribution 4.0 International License.
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Abstract
The study highlights the synthesis of Chromium Oxide Silica (CrSi) and Chromium Oxide Alumina (CrAl) catalysts using sol-gel and impregnation methods, respectively, and their evaluation in sorbitol hydrogenolysis. Characterization techniques such as nitrogen physisorption, FTIR spectroscopy, SEM, and TGA analyses were employed. CrSi exhibited a higher surface area (132.47 cm³/g) compared to CrAl (120.71 cm³/g), correlating with its superior catalytic performance. FTIR identified crucial functional groups, while SEM images showed a consistent porous structure for CrSi. TGA indicated thermal stability for both catalysts. Under optimized conditions, CrSi demonstrated superior performance, achieving a sorbitol conversion rate of 70.08% with notable selectivity towards ethylene glycol (33.95%) and propylene glycol (45.66%). In contrast, CrAl displayed a slightly lower conversion rate of 67.59%, with selectivity towards ethylene glycol (20.21%) and propylene glycol (37.56%), highlighting CrSi superior efficiency in sorbitol hydrogenolysis. This study emphasizes the significance of carefully choosing and optimizing catalysts for improving process efficiency and selectivity in sorbitol hydrogenolysis for industrial applications.
Keywords
- Chromium oxide,
- Silica,
- Alumina,
- Glycols,
- Sorbitol hydrogenolysis
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