N. Wijayati, N. Yusellina, F.W. Mahatmanti, N.D. Amalina, T. Sulistyaningsih, S.K. Rakainsa, R.A. Lusiana
D-limonene is the main component of essential oil in citrus oil which has low economic value. D-limonene can be increased in value by being converted into derivative compounds through the transformation of D-limonene compounds. The transformed compound D-limonene has a high economic value, but there are no studies using TCA impregnation catalysts on TiO2. The compound D-limonene which is the main focus of this research is the carvonee compound. D-limonene is transformed into its derivatives through oxidation and epoxidation reactions using a catalyst to accelerate the reaction. TiO2 was chosen as a catalyst because it is more environmentally friendly and the price is economical. The performance of the TiO2 catalyst was improved by the impregnation of TCA on TiO2. TCA-TiO2 catalyst was made with variations in the concentration of the addition of TCA used, namely (0, 15, and 35) %. The addition of TCA concentrations was varied to determine the best activity. Characterization of TCA-TiO2 in Scanning Electron Microscopy (SEM), X-ray diffractometer (XRD), BET, and acidity test using ammonia gas absorption gravimetric method is needed to determine the morphology, crystallinity, surface area, and acidity of the catalyst. The transformation of D-limonene is carried out by reacting D-limonene by reacting D-limonene and aquadest with the help of isopropyl alcohol as a solvent and a TCA-TiO2 catalyst. The transformation results were characterized using Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS) to calculate the conversion rate and product selectivity. The conversion and optimum selectivity of carvonee are 100% and 20.91% obtained at a reaction temperature of 40℃ TCA35-TiO2 catalyst as much as 0.4 g with a ratio of 13:2 mol of reactant D-limonene with aquadest. © 2024 Author(s).
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Semarang, Indonesia; Department of Chemistry, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. H. Soedarto, S.H., Tembalang, Semarang, 50275, Indonesia
