活性氧化铝吸附脱除模拟油中吡啶的研究

分别采用碱性、酸性、中性氧化铝吸附脱除氮质量分数为1 732 μg/g的模拟油（吡啶的正十二烷溶液）中的吡啶，确定最佳吸附剂，并探究各因素对其吸附脱氮效果的影响。结果表明：在处理15 mL模拟油时，使用1.2 g碱性氧化铝在303 K下吸附30 min的吸附脱氮效果最佳，氮去除率为61.24%；碱性氧化铝对模拟油中吡啶的吸附行为符合Langmuir-Freundlich混合模型，该吸附过程可自发进行，属于放热物理吸附，吸附过程符合准一级动力学模型；经过高温焙烧和乙醇洗涤的碱性氧化铝吸附剂，再生率分别为72.04%和71.48%，说明碱性氧化铝具有良好的再生性能。

STUDY ON ADSORPTION REMOVAL OF PYRIDINE FROM MODEL FUELS BY THREE KINDS OF ACTIVATED ALUMINA

The pyridine in the model fuel(n-dodecane solution of pyridine)containing nitrogen with mass fraction of 1732μg g was adsorbed by alkaline,acid and neutral alumina,respectively.To determine the best adsorbent,the effects of various adsorption factors on the adsorption efficiency were investigated.The results indicated that the best adsorption effect was obtained by using 1.2 g alkaline alumina at 303 K for 30 min when the 15 mL model fuel was adsorbed,and the nitrogen removal rate was 61.24%.Adsorption behavior of pyridine in simulated fuel by alkaline alumina accords with the Langmuir-Freundlich hybrid model.The adsorption process can be carried out spontaneously and belongs to exothermic physical adsorption,and accords with quasi-first-order kinetic model equation.After high temperature calcination or ethanol washing,the regeneration rates of the adsorbents were 72.04%and 71.48%respectively,which showed that alkaline alumina had good regeneration performance.