CAJ | 학술논문

使用共沉淀法制备了担载量很高的Ni/Al2O3催化剂,通过正丁醇干燥处理,提高了催化剂的表面积和担载镍的分散度.实验发现,镍的担载量和干燥过程刘催化剂的表面积、孔结构及金属镍的还原度和分散度影响很大.经过正丁醇处理的80%Ni/Al2O3-B催化剂具有较高的表面积,而担载镍的还原度和分散度也显著提高,使得催化剂具有很高的活性金属镍表面积(90m2/g-催化剂),该催化剂对甲苯有较强的吸附作用,在甲苯和苯酚的芳环加氢反应中表现出了很高的催化活性.
사용공침정법제비료담재량흔고적Ni/Al2O3최화제,통과정정순간조처리,제고료최화제적표면적화담재얼적분산도.실험발현,얼적담재량화간조과정류최화제적표면적、공결구급금속얼적환원도화분산도영향흔대.경과정정순처리적80%Ni/Al2O3-B최화제구유교고적표면적,이담재얼적환원도화분산도야현저제고,사득최화제구유흔고적활성금속얼표면적(90m2/g-최화제),해최화제대갑분유교강적흡부작용,재갑분화분분적방배가경반응중표현출료흔고적최화활성.
Highly loaded and dispersed Ni/Al2O3-B catalysts were prepared by the co-precipitation method with an n-butanol drying process.The loading of nickel and drying process were found to be the two key factors in determining the surface area and pore structures of catalysts as well as the reducibility and dispersion of supported nickel. The 80%Ni/Al2O3-B treated with n-butanol during the drying process exhibited the high surface area and high reducibility and dispersion of supported nickel, leading to the high active nickel surface area (90 m2/g-catalyst). It adsorbed toluene strongly and thus exhibited high activity for the hydrogenation of aromatic rings in toluene and phenol.