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Dealuminasi Zeolit Alam Menggunakan Asam (HCl dan H2SO4) untuk Katalis pada Proses Sintesis Biodiesel

Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia

Published: 1 Aug 2016.
Open Access Copyright 2016 Jurnal Kimia Sains dan Aplikasi under http://creativecommons.org/licenses/by-sa/4.0.

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Abstract
Telah dilakukan dealuminasi zeolit alam menggunakan asam (HCl dan H2SO4) untuk katalis pada proses sintesis biodiesel. Zeolit dianalisis dengan AAS dan FTIR serta uji aktivitas katalis pada sintesis biodiesel dengan metode GC-MS. Didapatkan bahwa H2SO4 lebih efektif mendealuminasi zeolite dibandingkan dengan HCl. Hasil spektrogram FTIR menunjukkan bahwa proses dealuminasi asam mengakibatkan perubahan bilangan gelombang dan rasio Si/Al yang cukup signifikan, di mana pada rasio Si/Al zeolit meningkat dari 4,57 menjadi 5,41 pada zeolit alam dealuminasi HCl dan menjadi 6,42 pada zeolit alam dealuminasi H2SO4. Zeolit terdealuminasi mampu bekerja sebagai katalis dalam sintesis biodiesel di mana katalis zeolit dealuminasi H2SO4 menghasilkan metil ester dengan senyawa dominan asam 9-oktadekenoat dengan persentase luas area sebesar 63,21% lebih banyak dibandingkan pada katalis zeolit dealuminasi HCl dan zeolite belum didealuminasi.
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Keywords: zeolit; dealuminasi; katalis; minyak jelantah; biodiesel; GC-MS

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