关键词: 分子磁强化, 碱性氮, 柴油

Abstract: The magnetic adsorbent for separating basic nitrogen compounds (BNC) in diesel fuel was prepared by precipitation method using ammonia as precipitator to react with Fe2+ and Fe3+. The BNC removal rates under various conditions were determined and the influence of additional magnetic field on the removal rate was studied. The results showed that the presence of additional magnetic field could promote the adsorption of BNC to the surface of magnetic adsorbent, thus, the removal of BNC was enhanced. Under the conditions of a reaction temperature of 0℃, a reaction time of 10 min, a mass ratio of adsorbent to oil of 0.06, when treating a model oil with a BNC concentration of 65.6 μg/g, the BNC removal rates were 83.3% and 94.0% for base case and with additional magnetic field (solenoid electric current intensity of 5A), respectively. At the same treating conditions, when a diesel fuel sample with a BNC concentration of 45.4 μg/g was tested, the BNC removal rates were 72.0% and 90.1% for base case and with additional magnetic field (solenoid electric current intensity of 5.0A), respectively; and the oil recovery rates were 98.1% and 98.9%, respectively.

Key words: molecular magnetism aggrandizement, basic nitrogen, diesel oil