TY - JOUR

T1 - A new insight to the assessment of asphaltene characterization by using fortier transformed infrared spectroscopy

AU - Taherian, Zeinab

AU - Dehaghani, AmirHossein Saeedi

AU - Ayatollahi, Shahab

AU - Kharrat, Riyaz

N1 - Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/10

Y1 - 2021/10

N2 - This research aims to present asphaltene fraction of oil by FTIR spectrum technique. For this purpose, threedifferent oil samples with various SARA contents and almost identical API degrees were utilized in this research.Two asphaltenic oil samples were referred to as ‘A’ and ‘B’, and the aliphatic oil sample was named as ‘C’. First ofall, the asphaltene fraction was extracted through the IP-143 test. The possible chemical bonds and functionalgroups were identified through NMR tests. Then, the FTIR spectrums of the oil samples and the extracted correspondingasphaltene fractions were taken. The interpretations were used to find the functional groups in theFTIR of the oil samples that belong to the asphaltene fractions. Among the investigated oil samples, noasphaltene related peak with a unique assignment was observed for the FTIR for sample ‘A’. The FTIR of oilsample ‘C’ showed amine related peaks, which belonged to the asphaltene fraction. Also, the alcohol and aminerelated peaks, which correspond to the asphaltene fraction, were detected in the FTIR of the oil sample ‘B’.According to the oil samples’ SARA contents, the ratio of the asphaltene content to the aromatic-based fractionseems to have a key role in this method.In other words, to detect the functional groups attached to the asphaltene fraction from the FTIR spectrum, theasphaltene fraction should have enough concentration compared to other aromatic-based components in the oil.The method’s applicability is initially based on the specific functional groups existence in the asphaltene fraction.

AB - This research aims to present asphaltene fraction of oil by FTIR spectrum technique. For this purpose, threedifferent oil samples with various SARA contents and almost identical API degrees were utilized in this research.Two asphaltenic oil samples were referred to as ‘A’ and ‘B’, and the aliphatic oil sample was named as ‘C’. First ofall, the asphaltene fraction was extracted through the IP-143 test. The possible chemical bonds and functionalgroups were identified through NMR tests. Then, the FTIR spectrums of the oil samples and the extracted correspondingasphaltene fractions were taken. The interpretations were used to find the functional groups in theFTIR of the oil samples that belong to the asphaltene fractions. Among the investigated oil samples, noasphaltene related peak with a unique assignment was observed for the FTIR for sample ‘A’. The FTIR of oilsample ‘C’ showed amine related peaks, which belonged to the asphaltene fraction. Also, the alcohol and aminerelated peaks, which correspond to the asphaltene fraction, were detected in the FTIR of the oil sample ‘B’.According to the oil samples’ SARA contents, the ratio of the asphaltene content to the aromatic-based fractionseems to have a key role in this method.In other words, to detect the functional groups attached to the asphaltene fraction from the FTIR spectrum, theasphaltene fraction should have enough concentration compared to other aromatic-based components in the oil.The method’s applicability is initially based on the specific functional groups existence in the asphaltene fraction.

KW - Asphaltene characterization

KW - Fourier-transform infrared spectroscopy

KW - Functional groups

KW - Aromatic compounds

KW - IP-143

UR - http://www.scopus.com/inward/record.url?scp=85105078840&partnerID=8YFLogxK

U2 - 10.1016/j.petrol.2021.108824

DO - 10.1016/j.petrol.2021.108824

M3 - Article

VL - 205

JO - Journal of Petroleum Science and Engineering

JF - Journal of Petroleum Science and Engineering

M1 - 108824

ER -