FARADILLA SYANI, 1017011030 (2014) SINTESIS ZEOLIT BERBASIS SILIKA SEKAM PADI DENGAN METODE ELEKTROKIMIA SEBAGAI KATALIS TRANSESTERIFIKASI MINYAK KELAPA. FAKULTAS MIPA, UNIVERSITAS LAMPUNG.
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Abstract
ABSTRAK Telah dilakukan transesterifikasi minyak kelapa dengan metanol menggunakan zeolit sintetik yang dihasilkan dengan metode elektrokimia. Untuk membuat zeolit dengan komposisi yang berbeda, percobaan sintesis dilakukan dengan pH yang berbeda yakni 4, 5, 6, 8, 10 dan waktu elektrolisis yang berbeda yakni 15, 30, 45, 60 menit dengan potensial tetap sebesar 8V. Uji katalis pada reaksi transesterifikasi dilakukan dengan variabel kinetis yakni waktu reaksi transesterifikasi. Kondisi optimum percobaan adalah penggunaan zeolit sebesar 5% terhadap berat reaktan, dengan perbandingan mol minyak kelapa dan metanol 1:4, pada suhu 70 oC selama 2 jam dengan persen konversi sebesar 100%. Analisis GC-MS menunjukkan adanya sepuluh puncak utama dengan komposisi tertinggi adalah metil miristat dengan jumlah relatif sebesar 21,03%. Berdasarkan analisis parameter biodiesel diperoleh produk transesterifikasi yang memenuhi standar SNI 04-7182-2006 yakni massa jenis 0,8895 g/mL, angka cetana 73,4, dan viskositas 5,49 mm2/s. Zeolit dengan unjuk kerja terbaik dikarakterisasi dengan SEM-EDX, BET dan XRD. Kata kunci: zeolit sintetis, elektrokimia, minyak kelapa, transesterifikasi. ABSTRACT This study was carried out to invistigate transesterification of coconut oil with methanol using synthetic zeolite produced by electrochemical method as catalyst. Preparation of synthetis zeolites was undertaken at varied pHs of 4, 5, 6, 8, 10 and electrolysis times of 15, 30, 45, 50 minutes, with specified potential of 8V. A series of transesterification reaction was performed to select the zeolites capable to catalyse transesterification, and reaction time. The optimum conditions obtained for the transesterification reaction are the use of zeolite 5% by weight of reactant, the mole ratio of coconut oil to methanol of 1: 4, temperature of 70 ° C, and reaction time of 2 hours with the percent conversion of 100%. GC-MS analysis showed the presence of ten major peaks with the highest peak belongs to methyl myristate with relative amount of 21.03%. Transesterification product was found to meet some of the standards of SNI 04-7182-2006 for biodiesel, includes density (0.8895 g/mL), cetane number (73.4), and viscosity (5.49 mm2/s). Zeolite with the best performance was characterized by SEM-EDX, BET, and XRD techniques. Key Word: synthetic zeolite, electrochemical, coconut oil, transesterification
| Item Type: | Other |
|---|---|
| Subjects: | A General Works = Karya Karya Umum |
| Divisions: | Fakultas MIPA > Prodi Kimia |
| Depositing User: | A.Md Cahya Anima Putra . |
| Date Deposited: | 12 Dec 2014 02:37 |
| Last Modified: | 12 Dec 2014 02:37 |
| URI: | http://digilib.unila.ac.id/id/eprint/5591 |
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