P123模板剂用量对超细镍钼加氢催化剂结构及性能的影响

以三嵌段共聚物P123为模板剂，采用溶胶-凝胶法制得不同P123用量(以 n(P123)/n(Ti+Si)计)的Ni-Mo/TiO₂-SiO₂催化剂前躯体；采用 TG-DTA、N₂吸附-脱附、XRD、H₂-TPR 和 HRTEM 对催化剂进行表征；在固定床连续流动微反装置上，以200^#低硫煤油为原料，考察催化剂的加氢脱芳烃性能。结果表明，P123用量对催化剂活性组分晶粒尺寸和孔结构参数有明显的影响；催化剂的活性组分分布均匀，没有明显的团聚现象，粒径在4～5 nm；催化剂适宜的比表面积和孔结构有利于煤油的加氢脱芳烃；经过工艺优化，采用 P123模板剂的 Ni-Mo/TiO₂-SiO₂系列催化剂中，n(P123)/n(Ti+Si)为0.005的催化剂能将煤油中的烷基苯质量分数降至0.41%， 萘质量分数降至280 μg/g，芳烃脱除率达到95.98%，产品的芳烃含量达到 JLD-40脱芳烃溶剂油的产品标准要求。

Influence of P123 Addition on Structure and Properties of Ultra Fine Nickel-Molybdenum Hydrogenation Catalysts

With triblock copolymer P123 as template,four Ni-Mo/TiO2-SiO2 catalyst precursors with different P123 additive amount(n(P123)/n(Ti+Si)) were prepared by sol-gel method.The physical properties of the four catalysts were characterized by TG-DTA,N2 adsorption-desorption,XRD,H2-TPR and HRTEM.In the continuous fixed bed reactor,the hydrodearomatization activities of the four catalysts were evaluated with 200# low-sulphur content kerosene as raw material.The results showed that the addition of P123 affected grain...