FCC汽油馏分在Ni/Al_2O_3催化剂上加氢脱硫醇的研究
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摘要
以改性氧化铝为载体,采用等体积浸渍法制备Ni/改性Al_2O_3催化剂。以FCC选择加氢脱硫后的重汽油馏分加正庚硫醇为原料,在100 m L固定床加氢评价装置上对所制备催化剂进行加氢脱硫改质活性评价。结果表明,加氢脱硫后重FCC汽油馏分在加氢脱硫醇过程中除脱硫醇和脱硫反应外,还存在烯烃加氢饱和反应、烯烃环化脱氢反应以及烯烃的异构化反应等,这些反应与工艺条件密切相关,并影响加氢生成油的辛烷值和改质效果。对所研制的重汽油馏分加氢脱硫醇改质催化剂适宜的工艺参数为:压力2. 0 MPa、反应温度340～360℃、反应氢油体积比200～250∶1、体积空速3. 5～4. 5 h-1。
Ni/Al_2O_3 catalyst is prepared through impregnation method by using modified alumina as carrier. Its activity is evaluated in a 100 m L fixed bed hydrogenation evaluation reactor by using N-heptanoic mercaptan-added heavy FCC gasoline fraction as raw materials. Hydrogeneration sweetening process of heavy FCC gasoline fractions after hydrodesulfurization exists not only sweetening reaction and desulfurization reaction but also hydrogenation saturation reaction,alkenes dehydrocyclization reaction and alkenes isomerization reaction.These reactions are closely related to the process conditions and affect the octane number and hydrogenation upgrading effect of the hydrogenated oil.The suitable process parameters for Ni/Al_2O_3 catalyst in the hydrogeneration sweetening process of heavy FCC gasoline fractions include 2 MPa,340-360℃,H2/oil radio of 200-250 ∶1 and space velocity of 3. 5-4. 5 h~(-1).
Ni/Al_2O_3 catalyst is prepared through impregnation method by using modified alumina as carrier. Its activity is evaluated in a 100 m L fixed bed hydrogenation evaluation reactor by using N-heptanoic mercaptan-added heavy FCC gasoline fraction as raw materials. Hydrogeneration sweetening process of heavy FCC gasoline fractions after hydrodesulfurization exists not only sweetening reaction and desulfurization reaction but also hydrogenation saturation reaction,alkenes dehydrocyclization reaction and alkenes isomerization reaction.These reactions are closely related to the process conditions and affect the octane number and hydrogenation upgrading effect of the hydrogenated oil.The suitable process parameters for Ni/Al_2O_3 catalyst in the hydrogeneration sweetening process of heavy FCC gasoline fractions include 2 MPa,340-360℃,H2/oil radio of 200-250 ∶1 and space velocity of 3. 5-4. 5 h~(-1).
引文
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[4]佘浩滨,夏树海,龚朝兵,等.全馏分催化汽油选择性加氢脱硫工艺升级改造运行分析[J].中外能源,2016,21(3):78-82.
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