外加磁场对催化裂化柴油氧化脱硫作用的研究

以石油醚为溶剂，二苯并噻吩为模型硫化物，配制成模拟油，在螺线管磁场中对油品进行氧化脱硫实验。结果表明，在外加磁场作用下，以30%过氧化氢为氧化剂，当电流强度为11 A、剂油比3.0、反应温度0 ℃、反应时间60 min时，模拟油中的硫含量可以从1 000μg/g降至118 μg/g。对于硫含量为5 647μg/g的催化裂化柴油（25 mL），在氧化剂过氧化氢（30%）用量5 mL、反应时间60 min、反应温度0 ℃、螺线管电流强度为11 A的条件下，催化裂化柴油的平均脱硫率为70.3%；而无磁场时催化裂化柴油的平均脱硫率为67.2%。

THE EFFECT OF MAGNETIC FIELD ON THE OXIDATIVE DESULPHURIZATION OF FCC DIESEL FUEL

Without the presence of catalyst, the oxidation of sulfur-containing compounds in model oil and FCC diesel fuel was conducted using 30% hydrogen peroxide as oxidant and a DC magnetic field was involved. The effect of reaction conditions such as the intensity of magnetic field, the ratio of oxidant to sulfur in oil (O/S), reaction temperature and reaction time on the sulfur removal rate was investigated, and the corresponding sulphone was removed from the system by extraction using acetonitrile as extractant. Results showed that under the conditions of a magnetic field intensity of 21mT, an O/S ratio of 3, a reaction temperature of 0 C and a reaction time of 60 min, the sulfur content of model oil could be reduced to 118 μg/g from the original 1 000 μg/g. Under these optimum reaction conditions, when 5ml 30% hydrogen peroxide was added into 25ml FCC diesel fuel, the average sulfur removal rate of FCC diesel fuel reached 70.3%; if without the presence of magnetic field the average sulfur removal rate of FCC diesel fuel was 67.2%.