Abstract
Metalloporphyrins are a compound that leads the contaminant in catalytic cracking of crude oil. This study aims to investigate the metalloporphyrin in crude oil from Duri, Riau, Indonesia. The extraction process yielded maltene and asphaltene up to 71.87 % and 1.07%, respectively. Asphaltene fraction was extracted by soxhlet using methanol solvent. The separation of asphaltene fraction was perfomed by column chromatography using mixing of toluene: chloroform: methanol (5:5:1) eluents. The Fourier Transform Infrared (FTIR) spectrum of asphaltene indicated the presence of a pyrolle ring at 800 cm−1 in the fingerprint region as a porphyrin-formed group. The UV-Vis absorption spectra of methanol separation showed free porphyrin at 580 nm and metalloporphyrins at 500–700 nm. The Microwave Plasma-Atomic Emission Spectrometer (MP-AES) qualitative analysis of asphaltene fraction showed the presence of vanadium, nickel, and iron. The Liquid Chromatography-Mass Spectrometry (LC-MS) analysis on asphaltene 15th fraction showed the presence of C34H39N4VO2 compound.
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