渣油固定床加氢处理油中镍和钒的分布研究

Nickel and vanadium distribution in the residue during hydrotreating in a fixed bed reactor

对混合渣油原料油在固定床连续加氢处理过程中镍和钒的质量分数及分布进行了研究,讨论了不同反应温度、不同加氢处理反应器生成油样中镍、钒分布的变化及原因。结果表明,原料油经固定床连续加氢处理后,镍和钒的质量分数明显降低。在基准反应温度t℃时,镍和钒的总脱除率分别达到了78.9%和85.8%。各段催化剂对镍和钒的脱除影响不同,保护剂段和脱金属段对镍和钒的脱除贡献较大。在各反应处理过程中,弱极性组分中镍和钒质量分数变化受温度影响较大,而强极性组分中镍和钒含量变化较小。

The distribution of nickel and vanadium in the residue feedstock and various products obtained from fixed bed hydrotreating was investigated.The contents of nickel and vanadium in three fractions（low polar,polar,and strong polar） obtained under different temperatures and from various catalytic sections were determined.The results showed that the contents of nickel and vanadium in the residue feedstock are reduced significantly after hydrotreating.The removal ratios of nickel and vanadium at the base temperature reach 78.9% and 85.8%,respectively.Moreover,both the nickel and vanadium compounds are mainly removed by the protecting catalyst and demetalization catalyst.The contents of nickel and vanadium in low polar fractions are obviously affected by the hydrotreating process and reaction temperature;however,the contents of nickel and vanadium in strong polar fractions are less sensitive to these processing parameters.