Naila, Diva Tristia (2025) Transesterifikasi WCO (Waste Cooking Oil) Menggunakan Katalis Koh/Zeolit Dengan Analisis Nilai Turnover Pada Katalis Dan Sifat Fisik Biodiesel. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Permintaan energi yang terus meningkat dan dampak negatif bahan bakar fosil terhadap lingkungan mendorong pengembangan sumber energi terbarukan seperti biodiesel. Penelitian ini bertujuan untuk memanfaatkan limbah minyak goreng bekas (Waste Cooking Oil/WCO) sebagai bahan baku biodiesel dengan katalis heterogen KOH/Zeolit. Proses dilakukan dengan rasio molar minyak terhadap metanol sebesar 1:12 pada suhu 65°C dengan variasi konsentrasi katalis sebesar 5 wt%, 8 wt%, dan 11 wt%. Karakterisasi katalis dilakukan menggunakan TPD-CO₂ dan FESEM-EDX untuk mengevaluasi kebasaan dan distribusi unsur. Analisis lebih lanjut menggunakan Response Surface Methodology (RSM) dilakukan untuk mempelajari hubungan antara parameter reaksi dan yield biodiesel, serta menentukan Turnover Number (TON) dan Turnover Frequency (TOF) katalis setelah digunakan berulang hingga lima siklus. Biodiesel yang dihasilkan dianalisis menggunakan GC-MS untuk mengonfirmasi keberadaan metil ester dan diuji kualitasnya melalui parameter fisikokimia seperti viskositas, densitas, dan Free Fatty Acid (FFA). Hasil penelitian menunjukkan bahwa katalis KOH/Zeolit mampu menghasilkan biodiesel dengan yield tertinggi sebesar 98% pada konsentrasi katalis 8 wt% di siklus pertama. Namun, efisiensi katalis menurun secara bertahap dengan siklus penggunaan, di mana nilai TOF dan TON mengalami penurunan akibat pencucian dan kehilangan aktivitas katalitik. Katalis dengan konsentrasi 5% menunjukkan stabilitas yang lebih baik dibandingkan konsentrasi yang lebih tinggi. Selain itu, sifat fisik biodiesel, seperti densitas dan viskositas, memenuhi SNI 7182:2015, menunjukkan kompatibilitas produk untuk penggunaan sebagai bahan bakar.
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The increasing demand for energy and the negative impact of fossil fuels on the environment encourage the development of renewable energy sources such as biodiesel. This research aims to utilize waste cooking oil (WCO) as raw material for biodiesel with a KOH/Zeolit heterogeneous catalyst. The process was carried out with a molar ratio of oil to methanol of 1:12 at a temperature of 65°C with variations in catalyst concentration of 5 wt%, 8 wt% and 11 wt %. Catalyst characterization was carried out using TPD-CO₂ and FESEM-EDX to evaluate basicity and element distribution. Further analysis using Response Surface Methodology (RSM) was carried out to study the relationship between reaction parameters and biodiesel yield, as well as determining the Turnover Number (TON) and Turnover Frequency (TOF) of the catalyst after repeated use for up to five cycles. The resulting biodiesel was analyzed using GC-MS to confirm the presence of methyl esters and tested for quality through physicochemical parameters such as viscosity, density and Free Fatty Acid (FFA). The research results showed that the KOH/Zeolit catalyst was able to produce biodiesel with the highest yield of 98% at a catalyst concentration of 8 wt% in the first cycle. However, the efficiency of the catalyst decreases gradually with the use cycle, where TOF and TON values decrease due to leaching and loss of catalytic activity. Catalyst with a concentration of 5% shows better stability than a higher concentration. In addition, the physical properties of biodiesel, such as density and viscosity, qualify SNI 7182:2015 indicating the product's compatibility for use as a fuel.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Transesterifikasi, Waste Cooking Oil (WCO), Biodiesel, Turnover Number (TON), Turnover Frequency (TOF). |
| Subjects: | Q Science > QD Chemistry > QD501 Catalysis. Catalysts. |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Diva Tristia Naila |
| Date Deposited: | 01 Feb 2025 08:55 |
| Last Modified: | 01 Feb 2025 08:55 |
| URI: | http://repository.its.ac.id/id/eprint/117424 |
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