CAJ | 학술논문

采用溶胶-凝胶法制备了不同 Ti？Si 比的 TiO2-SiO2复合载体，其负载的磷化镍催化剂采用等体积浸渍法和 H2原位还原法制备，以喹啉为模型化合物，考察了活性组分负载量、Ni？P 比、Ti？Si 比对催化剂加氢脱氮性能的影响。采用 N2吸附、XRD、TPR、NH3-TPD 和 FT-IR 等技术对载体和催化剂进行了表征。结果表明：溶胶-凝胶法制成的复合载体具有较大的比表面积，其负载的磷化镍催化剂具有较好的可还原性，Ni？P 摩尔比小于1.0时，还原后所形成的物相为 Ni2 P；当 Ti？Si 摩尔比为1？2、Ni？P 摩尔比为1.0、Ni-P 负载量（w）为25％时，Ni2 P？TiO2-SiO2催化剂具有最佳的加氢脱氮效果。
채용용효-응효법제비료불동 Ti？Si 비적 TiO2-SiO2복합재체，기부재적린화얼최화제채용등체적침지법화 H2원위환원법제비，이규람위모형화합물，고찰료활성조분부재량、Ni？P 비、Ti？Si 비대최화제가경탈담성능적영향。채용 N2흡부、XRD、TPR、NH3-TPD 화 FT-IR 등기술대재체화최화제진행료표정。결과표명：용효-응효법제성적복합재체구유교대적비표면적，기부재적린화얼최화제구유교호적가환원성，Ni？P 마이비소우1.0시，환원후소형성적물상위 Ni2 P；당 Ti？Si 마이비위1？2、Ni？P 마이비위1.0、Ni-P 부재량（w）위25％시，Ni2 P？TiO2-SiO2최화제구유최가적가경탈담효과。
TiO2-SiO2 composite support was prepared by sol-gel method,and the supported nickel phosphide catalysts,Ni2 P?TiO2-SiO2 ,were prepared by incipient wetness impregnation and in situ H 2 reduction method. The samples were characterized by N2 adsorption-desorption,XRD,TPR,NH 3-TPD and FT-IR. Their hydrodenitrogenation (HDN)performance was evaluated in a continuous-flow fixed-bed reactor using quinoline as a model molecule to investigate the effect of the active component loading, Ni?P molar ratio and Ti?Si molar ratio. The results show that TiO2-SiO2 composite support has a larger specific surface area. The Ni2 P?TiO2-SiO2 catalyst precursor has a better reducibility,which helps the formation of Ni2 P phase. Ni2 P phase appears for the Ni2 P?TiO2-SiO2 catalyst at n(Ni)?n(P)≤1.0. The optimal HDN activity occurs for the Ni2 P?TiO2-SiO2 with Ti?Si molar ratio of 1?2,Ni?P molar ratio of 1.0 and the loading of (NiO+P2 O5 )of 25%.