Fajrin, Alifah Nur Aini (2024) Kesetimbangan Cair-Cair Sistem Terner Geraniol/Citronellol + Etanol + Air dan Sistem Quaterner Geraniol + Citronellol + Etanol + Air pada 303,15 & 323,15 K dan Tekanan Atmosferik. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Minyak atsiri serai wangi merupakan salah satu komoditas minyak atsiri terbesar Indonesia. Sementara itu, salah satu persyaratan ekspor minyak atsiri serai wangi adalah total geraniol sebesar 85% sedangkan minyak atsiri serai wangi di pasaran memiliki geraniol sebesar 17-30% yang membuatnya memiliki mutu rendah sehingga harga jualnya rendah pula. Geraniol dan citronellol yang merupakan komponen utama minyak atsiri serai wangi banyak digunakan dalam industri parfum, kosmetik, serta memiliki berbagai properti biokimia dan farmakologi. Geraniol memiliki titik didih yang sangat dekat dengan citronellol yaitu masing-masing 230 °C dan 224,25 °C sehingga sulit jika dilakukan isolasi menggunakan distilasi, sehingga ekstraksi pelarut dapat digunakan untuk proses isolasi geraniol dan citronellol dengan tujuan mendapat minyak atsiri serai wangi dengan mutu dan harga jual yang tinggi. Etanol digunakan sebagai pelarut karena sifatnya yang tidak beracun, mudah didapat, dan selektif. Dalam desain proses ekstraksi, diperlukan data kesetimbangan cair-cair (LLE) dari komponen-komponen yang akan diekstraksi. Dalam penelitian ini, dilakukan pengukuran data kesetimbangan cair-cair untuk sistem terner geraniol (1) + etanol(2) + air(3) dan citronellol(1) + etanol(2) + air(3), serta sistem quaterner geraniol(1) + citronellol(2) + etanol(3) + air(4) pada suhu 303,15 & 323,15 K dan tekanan atmosferik. Digunakan satu set equilibrium cell yang dilengkapi jaket pemanas dan magnetic stirrer dalam penelitian ini dengan pengadukan selama 4 jam dan settling time 20 jam untuk mendapat komposisi fasa aqueous dan organik melalui analisa Gas Chromatography. Data hasil analisa kemudian dikorelasikan dengan model koefisien aktivitas NRTL dan UNIQUAC. Hasil dari penelitian ini adalah didapatkannya data kesetimbangan-cair cair eksperimental sistem terner geraniol (1) + etanol (2) + air (3) dan citronellol (1) + etanol (2) + air (3), serta sistem quaterner geraniol (1) + citronellol (2) + etanol (3) + air (4) pada suhu 303,15 & 323,15 K yang telah teruji konsisten menggunakan korelasi Bachman-Brown serta parameter interaksi biner hasil korelasi model koefisien aktivitas NRTL dan UNIQUAC dengan rentang RMSD 0,0086-0,0164 untuk sistem terner dan 0,0161-0,0181 untuk sistem quaterner. Penelitian ini diharapkan dapat dijadikan dasar pengembangan proses pemurnian senyawa-senyawa dalam minyak atsiri serai wangi agar memiliki nilai tambah yang dapat dimanfaatkan, serta sebagai bahan referensi untuk merancang proses ekstraksi sehingga diperoleh minyak serai wangi dengan kemurnian tinggi
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emongrass essential oil is one of Indonesia's largest essential oil commodities. Meanwhile, one of the export requirements for citronella essential oil is a total of 85% geraniol, while citronella essential oil on the market has 17-30% geraniol, which makes it of low quality so the selling price is also low. Geraniol and citronellol, which are the main components of citronella essential oil, are widely used in the perfume and cosmetics industries, and have various biochemical and pharmacological properties. Geraniol has a boiling point that is very close to citronellol, namely 230 °C and 224.25 °C respectively, making it difficult to isolate using distillation, so solvent extraction can be used for the isolation process of geraniol and citronellol with the aim of obtaining quality citronella essential oil. and high selling prices. Ethanol is used as a solvent because it is non-toxic, easily available, and selective. In the design of the extraction process, liquid-liquid equilibrium (LLE) data is needed for the components to be extracted. In this study, liquid-liquid equilibrium data were measured for the ternary systems geraniol (1) + ethanol(2) + water(3) and citronellol(1) + ethanol(2) + water(3), as well as the quaternary system geraniol(1 ) + citronellol(2) + ethanol(3) + water(4) at temperatures of 303.15 & 323.15 K and atmospheric pressure. A set of equilibrium cells equipped with a heating jacket and magnetic stirrer were used in this research with 4 hours of stirring and 20 hours of settling time to obtain the composition of the aqueous and organic phases through Gas Chromatography analysis. The analysis data was then correlated with the NRTL and UNIQUAC activity coefficient models. The results of this research are the experimental liquid-equilibrium data obtained for the ternary systems of geraniol (1) + ethanol (2) + water (3) and citronellol (1) + ethanol (2) + water (3), as well as the quaternary system of geraniol (1 ) + citronellol (2) + ethanol (3) + water (4) at temperatures of 303.15 & 323.15 K which have been tested consistently using the Bachman-Brown correlation and binary interaction parameters from the correlation results of the NRTL and UNIQUAC activity coefficient models with the RMSD range 0.0086-0.0164 for the ternary system and 0.0161-0.0181 for the quaternary system. It is hoped that this research can be used as a basis for developing a process for refining the compounds in citronella essential oil so that it has added value that can be utilized, as well as as a reference material for designing the extraction process so that high purity citronella oil is obtained.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Air, Citronellol, Etanol, Geraniol, Kesetimbangan cair-cair, Water, Ethanol, Liquid-liquid equilibrium |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry > QD416 Essences and essential oils. Q Science > QD Chemistry > QD63 Extraction Q Science > QD Chemistry > QD63.S4 Separation (Technology) |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis |
| Depositing User: | Alifah Nur Aini Fajrin |
| Date Deposited: | 05 Feb 2024 06:42 |
| Last Modified: | 06 Feb 2024 06:26 |
| URI: | http://repository.its.ac.id/id/eprint/106125 |
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