加氢处理温度对渣油中杂质脱除率的影响

摘要

The reside hydro-processing pilot plant was used to investigate property changes of residue before and after hydrotreatment at different temperatures, and removal rates and distribution laws of sulfur, nitrogen, nickel, vanadium and carbon residue were studied. The result shows that, at constant temperature, contents of sulfur, nitrogen, nickel, vanadium and carbon residue in hydrotreated residue decrease as the activity of catalysts is enhanced; impurity contents in hydrotreated residue decrease as the reaction temperature rises. The total removal efficiency of sulfur, nitrogen, nickel, vanadium and carbon residue increases as the reaction temperature rises. But, removal efficiency of impurities in different reactors is different. 50% of nickel and 60% of vanadium are removed in reactor No.1 and reactor No.2. Sulfur is mainly removed in reactor No.3 and reactor No.4. Nitrogen is mainly removed in reactor No.4 and reactor No.S. Carbon residue is removed in reactor No.l, reactor No.3 and reactor No.4. The removal efficiency of different impurities presents respective regulation with the temperature change.%利用渣油加氢中试装置,考察了原料渣油在不同反应温度下经级配催化剂加氢处理前后渣油性质的变化,揭示了硫、氮、镍、钒和残炭的脱除分布规律.结果表明,在恒定温度下,随催化剂活性增加,加氢处理渣油中硫、氮、镍、钒和残炭的含量降低；随反应温度升高,同一反应器得到的渣油杂质含量降低.硫、氮、镍、钒和残炭的总脱除率随反应温度增加而增加,但杂质在各反应器中的脱除率分布不同,50%的镍和60%的钒在前两个反应器中脱除,硫主要在R3和R4反应器中脱除,氮主要在R4和R5反应器中脱除,而残炭则在R1、R3和R4反应器中脱除,随温度变化杂质的脱除率分布呈现各自的变化趋势.