Belinda, Rosa and Sutanto, Hery and Darmawan, Akhmad (2018) Modification of Pyrogallol With Palmitic Acid as a Soluble Biodiesel Additive. Bachelor thesis, Swiss German University.

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Abstract

Biodiesel, as a promising substitute for fossil diesel oil, has nevertheless a main disadvantage, which is oxidized easily. The oxidation degrades its quality and causes disturbances to the machine during operations. Therefore, antioxidant is commonly used in biodiesel. However, the common antioxidant used, namely pyrogallol, has a poor solubility in biodiesel due to the polarity difference. Therefore, this research focused on the modification of pyrogallol by attaching palmitic acid molecule to the benzene ring of pyrogallol molecule through the Friedel-Crafts acylation. The product was characterized by TLC and 1 H NMR spectroscopy. It was found that the reaction produced a new product, 1.1’-(4,5,6-trihydroxy-1,3-phenylene)bis(hexadecane-1-one). The new product was subjected to a solubility test and an antioxidant activity evaluation. The result showed that the solubility limit of the product was at 2500 ppm, which was significantly higher than pyrogallol analyzed using one sample t-test. However, using DPPH method, it was found that the antioxidant activity of the new product was lower than pyrogallol as the IC50 value of the new product was 18.44 ppm, and pyrogallol’s was 3.07 ppm.

Item Type:	Thesis (Bachelor)
Uncontrolled Keywords:	Biodiesel; Pyrogallol; Palmitic Acid; Friedel-Crafts Acylation; Solubility
Subjects:	Q Science > QD Chemistry > QD341 Pyrogallol Q Science > QD Chemistry > QD543 Solubility T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources
Divisions:	Faculty of Life Sciences and Technology > Department of Sustainable and Energy Environment
Depositing User:	Astuti Kusumaningrum
Date Deposited:	29 Sep 2020 03:05
Last Modified:	29 Sep 2020 03:05
URI:	http://repository.sgu.ac.id/id/eprint/869

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