Mahadi, Bahari and Aishah, Abdul Jalil and Nurul Sahida, Hassan and Madzlan, Abd Aziz and Izzudin, N. M. and Arezudin, A. and Rahman, A. F.A. and Rajendran, Saravanan and Kamarizan, Kidam and Herma Dina, Setiabudi (2025) Precursor-driven acidity enhancement in Titania-modified KCC-1 for efficient n-Hexane hydroisomerization. Molecular Catalysis, 574 (114867). pp. 1-9. ISSN 2468-8231. (Published)
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Abstract
The catalytic activity of titania-loaded fibrous silica (KCC-1) catalysts synthesized using different titania (Ti) precursor compounds was first explored for the hydroisomerization of n-hexane. The Ti crystallite sizes reveal a descending order: TiSO4/KCC-1 (9.70 nm) > Ti-Iso/KCC-1 (4.86 nm) > TiCl4/KCC-1 (3.64 nm), indicating the lower Ti distribution for TiSO4/KCC-1. A decline in surface area is observed as Ti-Iso/KCC-1 (549 m2 g−1) < TiSO4/KCC-1 (599 m2 g−1) < TiCl4/KCC-1 (619 m2 g−1) < KCC-1 (644 m2 g−1), resulted from partial blockage of TiO2 particles and structural disruption of KCC-1 support. The NH3-TPD analysis reveals the total area acid amount of Ti-Iso/KCC-1 surpassed the other Ti-loaded KCC-1 catalysts, attributed to the presence of acidic protons on isopropoxide ligands. Among the n-hexane hydroisomerization catalysts, Ti-Iso/KCC-1 stands out with the most substantial isomer production, achieving a notable 59.7 % yield, followed by TiCl4/KCC-1 (54.5 %) > TiSO4/KCC-1 (54.1 %) > KCC-1 (23.1 %). This trend corresponds with the sequence of total area acid amount from NH3-TPD desorption peaks, highlighting the enhanced isomer activity in Ti-Iso/KCC-1 compared to others due to higher amounts of acidity.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Hydroisomerization; N-hexane; Titania; Fibrous silica; Acidity |
| Subjects: | Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical and Process Engineering Technology |
| Depositing User: | Mr Muhamad Firdaus Janih@Jaini |
| Date Deposited: | 12 Feb 2025 08:55 |
| Last Modified: | 12 Feb 2025 08:55 |
| URI: | http://umpir.ump.edu.my/id/eprint/43802 |
| Download Statistic: | View Download Statistics |
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