PUTRI, QODRIA UTAMI and Hasanudin, Hasanudin and ASRI, WAN RYAN and Mara, Ady and Maryana, Roni and Gea, Saharman and Wijaya, Karna (2023) Production of levulinic acid from glucose using nickel phosphate‑silica catalyst (Similarity). Universitas sriwijaya. (Submitted)
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Turnitin hasanudin-Artikel REAC vol 136 hal. 287-309 2023.pdf Download (4MB) | Preview |
Abstract
A combination of nickel-silica and nickel phosphate is hypothesized to provide a synergistic effect on catalytic processes of LA production from glucose. This research aims to produce LA from glucose by employing nickel phosphate-silica catalysts. The effect of different phosphate catalyst precursors on the yield of LA was investigated. Catalysts were assessed by using FT-IR, SEM–EDX, XRD, and N2 adsorption–desorption isotherms. Acidity analysis for the catalysts was performed by the gravimetric method. The product of levulinic acid was examined by HPLC. The study exhibited that the incorporation of phosphate ions into nickel-silica increased the acidity of the catalyst and inherently provided an increase in LA yield. It was found that the hydrogen atoms number from different phosphate precursors showed a positive correlation to the increase in LA yield as well. Ni(H2PO4)–2SiO2 catalyst had the highest activity compared to the others catalysts on LA formation, whereas Ni3(PO4)2–SiO2 dominantly promoted formic acid formation. Further opti- mization by RSM-CCD showed that the optimum condition was achieved at a tem- perature of 113.20 °C, a reaction time of 120 min, and a catalyst weight of 0.4573 g with an LA yield of 40.89%. The quadratic model as derived from RSM-CCD dem- onstrated good accuracy in estimating the output parameter. This catalyst was still active at 5 consecutive runs with a slight decrease toward LA formation.
| Item Type: | Other |
|---|---|
| Subjects: | #3 Repository of Lecturer Academic Credit Systems (TPAK) > Results of Ithenticate Plagiarism and Similarity Checker |
| Divisions: | 08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1) |
| Depositing User: | Dr. Hasanudin Hasanudin |
| Date Deposited: | 27 Feb 2023 08:28 |
| Last Modified: | 27 Feb 2023 08:28 |
| URI: | http://repository.unsri.ac.id/id/eprint/89773 |
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