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以燃料油为研究对象进行室外自然风化实验(0~100 d),探讨了金刚烷的风化规律,在同一风化条件下,比较了燃料油和原油中金刚烷组分的风化特征。结果表明:燃料油中单金刚烷在风化60 d内全部被降解,渤海原油1号中单金刚烷在风化45 d内被降解完全,双金刚烷受风化影响较小。通过t检验分析,所选诊断比值中,燃料油中有7个金刚烷指标在风化20 d内保持稳定,双金刚烷指标DMDI-3、DMDI-4和DMDI-5在自然风化100 d内具有较好的稳定性,适合于长时间风化条件下溢油的鉴别。与渤海原油1号相比,燃料油中双金刚烷诊断比值稳定性更好,这可能与燃料油中双金刚烷浓度高、数据信号强、计算过程引入的误差小有关。
Weathered natural weathering experiment (0 ~ 100 d) with fuel oil as the research object, we discussed the weathering regularity of adamantane, and compared the weathering characteristics of the adamantane components in fuel oil and crude oil under the same weathering condition. The results showed that all the monoadamantanes in the fuel oil were all degraded within 60 days of weathering, and the monoadamantanes in Bohai crude oil No. 1 were completely degraded within 45 days of weathering. The biadamantanes were less affected by the weathering. Through the t-test analysis, among the selected diagnostic ratios, seven indicators of adamantane in fuel oil remained stable within 20 days of weathering, and diamantane indicators DMDI-3, DMDI-4 and DMDI-5 had Good stability, suitable for long time weather conditions, the identification of oil spills. Compared with Bohai crude oil No. 1, the stability of the bis-adamantane in the fuel oil is better, which may be related to the high concentration of the biadamantane in the fuel oil, strong data signal and small error introduced in the calculation process.