CD Tesis

proses fraksionasi biodiesel melalui metode urea inclusion compounds (uic)

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Biodiesel is an alternative fuel derived from renewable resources such as
vegetable oils and animal fats. Its quality is highly influenced by the composition
of its fatty acids, which include saturated fatty acids (SFA), monounsaturated fatty
acids (MUFA), and polyunsaturated fatty acids (PUFA). A high PUFA content
can reduce the oxidative stability of biodiesel and accelerate degradation during
storage.
This study aims to improve biodiesel quality through a fractionation
process using the Urea Inclusion Compound (UIC) method, a separation
technique based on the ability of urea to form inclusion compounds with SFA and
some MUFA, while PUFA remains uncomplexed. Through this process, it is
expected to obtain a biodiesel fraction (UCF – Urea-Complexed FAME) with
lower iodine value and better oxidative stability, in accordance with biodiesel
quality standards.The process conditions were optimized using Response Surface
Methodology (RSM) with a Central Composite Design (CCD) to evaluate the
effects of the urea-to-methanol molar ratio, crystallization temperature, and
crystallization time on two main responses: the yield of the UCF fraction and its
iodine value (IV). Experimental data were statistically analyzed to develop
predictive models and determine the optimal process conditions.
The results showed that the UIC method effectively separated the PUFA
fraction from raw biodiesel. An appropriate combination of urea-to-methanol
ratio, crystallization temperature, and time yielded a UCF fraction with a high
yield (>70%) and an iodine value within the range of 30–40 g I₂/100 g, meeting
the criteria for oxidatively stable biodiesel. The best conditions obtained in this
study were a urea-to-methanol ratio of 1:2, crystallization temperature of 18 °C,
and crystallization time of 5 hours, resulting in a UCF yield of 85.88% and an
iodine value of 33.23 g I₂/100 g. Furthermore, this method offers a relatively
simple, efficient, and scalable approach for improving biodiesel quality in a
sustainable manner
Keywords: Iodine Value, Biodiesel, Response Surface Methodology, Urea
Inclusion

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2010241784

Penerbit

Pekanbaru : UNRI – PASCA – Magister Teknik Kimia., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2010241784

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

Magister Teknik Kimia

Info Detail Spesifik

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Pernyataan Tanggungjawab

Rahmat

Versi lain/terkait

Lampiran Berkas

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