The additives for reducing the olefins in the fluid catalytic cracking（FCC） gasoline were prepared by peptization.The effect of additives for reducing the olefins in the gasoline was evaluated in the micro reactor.T...The additives for reducing the olefins in the fluid catalytic cracking（FCC） gasoline were prepared by peptization.The effect of additives for reducing the olefins in the gasoline was evaluated in the micro reactor.The additive with the molar ratio of Mg and Al（n/n）,1∶1,had the best olefins reducing reaction activity.XRD result showed that MgAl2O4·MgO spinel was formed in the additive.Studied by Infrared Ray,it was found that the amount of total L acid decreased by adding the content of rare earth.Meanwhile the amounts of weak L acid and the total weak acid increased.Thereby,the hydrogen migration activity of FCC catalyst increased.When the content of the rare earth was 20%,the olefins reducing activity was 45.45%.Studied by XRD,it was thought that the effect of reducing the olefins of the FCC gasoline was the result of the cooperative efforts of MgAl2O4 and ReO2.展开更多
The influence of active metal components of catalyst, additives and catalyst preparation method on the reactivity of catalyst for selective hydrodesulfurization (HDS) of FCC naphtha was investigated, and the RSDS-21 c...The influence of active metal components of catalyst, additives and catalyst preparation method on the reactivity of catalyst for selective hydrodesulfurization (HDS) of FCC naphtha was investigated, and the RSDS-21 catalyst with high HDS performance and the RSDS-22 catalyst with high selectivity were developed by RIPP. The composite loading of a new series of catalysts for selective HDS of FCC gasoline has demonstrated excellent desulfurization activity and selectivity and can under conventional hydrotreating conditions manufacture clean gasoline product meeting the national IV emission standard and the Euro V emission standard with less loss in antiknock index. The finalized new series of FCC catalysts upon being adopted for selective HDS of FCC naphtha have good adaptability to different feedstocks along with good stability.展开更多
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...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。展开更多
文摘The additives for reducing the olefins in the fluid catalytic cracking（FCC） gasoline were prepared by peptization.The effect of additives for reducing the olefins in the gasoline was evaluated in the micro reactor.The additive with the molar ratio of Mg and Al（n/n）,1∶1,had the best olefins reducing reaction activity.XRD result showed that MgAl2O4·MgO spinel was formed in the additive.Studied by Infrared Ray,it was found that the amount of total L acid decreased by adding the content of rare earth.Meanwhile the amounts of weak L acid and the total weak acid increased.Thereby,the hydrogen migration activity of FCC catalyst increased.When the content of the rare earth was 20%,the olefins reducing activity was 45.45%.Studied by XRD,it was thought that the effect of reducing the olefins of the FCC gasoline was the result of the cooperative efforts of MgAl2O4 and ReO2.
文摘The influence of active metal components of catalyst, additives and catalyst preparation method on the reactivity of catalyst for selective hydrodesulfurization (HDS) of FCC naphtha was investigated, and the RSDS-21 catalyst with high HDS performance and the RSDS-22 catalyst with high selectivity were developed by RIPP. The composite loading of a new series of catalysts for selective HDS of FCC gasoline has demonstrated excellent desulfurization activity and selectivity and can under conventional hydrotreating conditions manufacture clean gasoline product meeting the national IV emission standard and the Euro V emission standard with less loss in antiknock index. The finalized new series of FCC catalysts upon being adopted for selective HDS of FCC naphtha have good adaptability to different feedstocks along with good stability.
