Modification of Pyrogallol with Palmitic Acid as a Soluble Biodiesel Additive

Hery Sutanto, Rosa Belinda, Silvya Yusri, Akhmad Darmawan, Evita H. Legowo, Mohammad Nasikin

Research output: Contribution to journalConference articlepeer-review


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 1H 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 slightly lower than pyrogallol as the IC50 value of the new product was 18.44 ppm, and pyrogallol's was 3.07 ppm.

Original languageEnglish
Article number012004
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 9 Mar 2020
Event2019 International Conference on Chemical Engineering, ICCE 2019 - Bandung, Indonesia
Duration: 28 Nov 201929 Nov 2019


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