Abstract

The photochemical stability of resins and asphaltenes during their photolysis under the influence of radiation from a mercury lamp is investigated by IR spectroscopy. It is found that exposure to UV light leads to a change in the band intensities of the absorption spectrum in the range of 400–3400 cm^–1. The observed trends are explained on the basis of the transfer of excitation energy from polycyclic aromatic hydrocarbon (PAH) molecules to alkane molecules. From the values of the extinction coefficient and the relative concentration of PAHs in crude oil, the fractions of UV light energy absorption by molecules of individual PAH components are calculated.

中文翻译：

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红外光谱研究紫外线辐射对原油树脂和沥青质馏分的影响

摘要

通过红外光谱研究了汞灯辐射下树脂和沥青质在光解过程中的光化学稳定性。结果发现，暴露在紫外线下会导致在400–3400 cm ^–1范围内吸收光谱的谱带强度发生变化。根据将激发能从多环芳烃（PAH）分子转移到烷烃分子的方法来解释观察到的趋势。从消光系数的值和原油中PAHs的相对浓度，可以计算出各个PAH组分的分子吸收的紫外线能量的比例。