TiO_2改性对α-Al_2O_3负载型磷化镍(Ni_2P)催化植物油加氢脱氧的影响  

Effect of TiO_2 Modifying Nickel Phosphide(Ni_2P)Supported Over α-Al_2O_3 on Catalyzing Vegetable Oil Hydrodeoxygenation

作　　者：李振雨 刘旭光[1] 张宝泉[1,2] 杜芳林[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042 [2]天津大学化工学院,天津300072

出　　处：《青岛科技大学学报（自然科学版）》2017年第6期44-49,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51272115)

摘　　要：Ni_2PRu/α-Al_2O_3是一种新型的催化加氢催化剂。该催化剂可以通过TiO_2进行改性。所得TiO_2-Ni2PRu/α-Al_2O_3中Ni2P晶粒的尺寸约为18nm,明显小于Ni2PRu/α-Al_2O_3中Ni2P晶粒的尺寸(24nm)。这可能与前驱体的还原性能有关。H2-TPR研究表明:Ni2PRu/α-Al_2O_3前驱体的峰顶还原温度位于500℃左右,而TiO_2-Ni2PRuO/α-Al_2O_3前驱体的中峰顶还原温度分别位于380℃和467℃左右。此外,H2-TPD的研究发现,TiO_2-Ni2PRu/α-Al_2O_3和Ni2PRu/α-Al_2O_3催化剂表面都具有丰富的解离氢。但TiO_2-Ni2PRu/α-Al_2O_3对植物油具有更优异的加氢脱氧性能。催化加氢性能的研究表明:Ni2PRu/α-Al_2O_3催化植物油加氢反应液相产物中未完全反应产物的质量分数小于5%,TiO_2-Ni2PRu/α-Al_2O_3对应的液相产物中未完全反应产物的质量分数则小于1%。Ni2PRu/α-Al2O3 is a new type catalyst for hydrodeoxygenation.Modification of Ni2 PRu/α-Al2O3 with TiO2 is investigated.Crystal size of Ni2 P in the obtained catalysts,labelled as TiO2-Ni2 PRu/α-Al2O3,is estimated to be 18 nm,which is smaller than that（24 nm）in Ni2 PRu/α-Al2O3.This behavior may be related with the reductionability of precursor.It is demonstrated by H2-TPR characterization that the reduction peak temperature of TiO2-Ni2 PRu/α-Al2O3 precursor are located around 380℃and 467℃,being lower than that（500 ℃）of Ni2 PRu/α-Al2O3 precursor.Abundant dissociative hydrogen on the surface of TiO2-Ni2 PRu/α-Al2O3 and Ni2 PRu/α-Al2O3 are proved by H2-TPD characterization.However,TiO2-Ni2 PRu/α-Al2O3 shows better catalytic hydrodeoxygenation performance for vegetable oil.During its catalytic hydrodeoxygenation test,mass content of residual reactants in liquid products is calculated to be less than 1%.Such a value for Ni2 PRu/α-Al2O3 is estimated to be less than 5%.

关 键 词：二氧化钛(TiO2) 磷化镍(Ni2P) 加氢脱氧 

分 类 号：O643.32[理学—物理化学]