Polvara Elisa, Legnani Vittoria, Invernizzi Marzio, Sironi Selena
Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
Molecules. 2025 Mar 1;30(5):1136. doi: 10.3390/molecules30051136.
This study focuses on the olfactometric and chemical characterisation of gaseous and vapour emissions from different crude oils. To investigate this topic, laboratory experiments were set up to obtain comparable gaseous samples: they were estimated in terms of odour concentration (C), via dynamic olfactometry, and chemical-specific characterisation. It was found that, even if considered similar in regard to physical properties and chemical composition, the gaseous emissions of different crude oils are significantly different in terms of odorous potential. The observed discrepancy appears to be associated with the presence of volatile organic sulphur compounds (VOSCs), and the highest values of C were found in samples containing mercaptans and sulphides. In addition, from the conducted comparison, it appeared that crude odorous potential, in terms of C, is not strictly linked to the quantity of the volatile organic compounds (VOCs), HS concentration, or a priori knowledge of the percentage of elemental sulphur in the crude; on the contrary, the presence of volatile organic sulphur compounds in the gaseous emissions is the most influential parameter for the odour potential of this matrix.
本研究聚焦于不同原油气态和蒸汽排放物的嗅觉测定和化学特性。为研究该主题，开展了实验室实验以获取可比较的气态样品：通过动态嗅觉测定法对其气味浓度（C）进行评估，并进行化学特性分析。研究发现，即便不同原油在物理性质和化学成分方面被认为相似，但其气态排放物在气味潜力方面却存在显著差异。观察到的差异似乎与挥发性有机硫化合物（VOSCs）的存在有关，且在含有硫醇和硫化物的样品中发现了最高的C值。此外，通过所进行的比较发现，就C而言，原油的原始气味潜力与挥发性有机化合物（VOCs）的量、HS浓度或原油中元素硫百分比的先验知识并无严格关联；相反，气态排放物中挥发性有机硫化合物的存在是该基质气味潜力最具影响力的参数。
