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在温度为 2 90～ 360K、氧气压力为 0 .10～ 0 .2 5MPa、无光照和Cu催化条件下详细考察了温度和氧气压力对大庆直馏柴油和焦化加氢柴油吸氧氧化性能的影响。在给定的试验条件下随温度或氧气压力的升高 ,柴油的吸氧量迅速增加 ;氧气压力或温度越高或时间越长 ,柴油的吸氧量越大 ;在短的吸氧时间下柴油吸氧量的变化幅度较小 ,而在长的时间下柴油吸氧量的变化幅度较大 ;低温对直馏柴油的吸氧量影响较大 ,而高温对焦化加氢柴油的吸氧量影响较显著 ;氧气压力对直馏柴油的吸氧量有较大的影响 ,而对焦化加氢柴油的吸氧量影响较小 ;低温或高氧气压力下焦化加氢柴油的吸氧量小于直馏柴油 ,而在高温或低氧气压力下焦化加氢柴油的吸氧量反而大于直馏柴油。柴油中含有某些不饱和烃 ,特别是共轭二烯烃、环烷、芳香烃类等不安定组分的种类越多及含量越高 ,就越容易发生吸氧氧化反应 ,安定性能或质量下降越明显。
Effects of temperature and oxygen pressure on the oxygen uptake performance of Daqing Straight-run diesel and coker hydrogenated diesel oil were investigated in detail at temperatures of 2 90 ~ 360K and oxygen pressures of 0 ~ 10 ~ 0. 25MPa in the absence of sunlight and Cu catalysis . Under the given experimental conditions, with the increase of temperature or oxygen pressure, the oxygen uptake of diesel oil increases rapidly. The higher the oxygen pressure or temperature or the longer the oxygen uptake of diesel oil, The change of oxygen uptake of diesel is smaller, while the change of oxygen uptake of diesel under a long time is larger. Low temperature has a great influence on the oxygen uptake of straight-run diesel, while the oxygen uptake of hydrogenated diesel at high temperature The oxygen pressure has a greater impact on the oxygen uptake of straight-run diesel oil, but less on the oxygen uptake of coker hydrogenated diesel oil; the oxygen uptake of coker hydrogenated diesel oil under low or high oxygen pressure is less than that of straight Distillate diesel oil, while under high temperature or low oxygen pressure hydrogenated coker hydrogen oxygen but greater than straight-run diesel. Diesel contains some unsaturated hydrocarbons, especially conjugated diolefins, naphthenes, aromatic hydrocarbons and other types of instability more species and the higher the content, the more prone to oxygen absorption oxidation reaction, stability or quality degradation The more obvious.