载体制备方法对Ni/ZrO_2催化剂顺酐液相加氢性能的影响  

Effect of zirconia preparation methods on catalytic performance of Ni/ZrO_2 catalysts for liquid phase hydrogenation of maleic anhydride

作　　者：梁二艳 张因[1] 赵丽丽[1] 武瑞芳[1] 王杰[1] 赵永祥[1] 

机构地区：[1]山西大学化学化工学院精细化学品教育部工程研究中心,山西太原030006

出　　处：《工业催化》2017年第3期18-24,共7页Industrial Catalysis

基　　金：国家自然科学基金青年科学基金项目(21303097);国家国际科技合作专项(2013DFA40460)

摘　　要：分别以水和甲醇为溶剂制备晶粒尺寸基本一致的四方相ZrO_2,通过浸渍法制备Ni质量分数10%的Ni/ZrO_2-W(水为溶剂)与Ni/ZrO_2-M(甲醇为溶剂)催化剂,考察其催化顺酐液相加氢性能。采用BET、XRD、H_2-TPR、H_2-TPD和in situ FT-IR对催化剂进行表征。结果表明,以甲醇为溶剂制备的ZrO_2比表面积明显小于以水为溶剂制备的ZrO_2,但Ni/ZrO_2-M催化剂存在强的金属-载体相互作用,其活性金属分散度以及C=O加氢活性明显高于Ni/ZrO_2-W催化剂。在反应温度210℃和氢压5 MPa条件下反应3 h,Ni/ZrO_2-M催化剂上顺酐转化率几乎100%,γ-丁内酯选择性为22.8%,Ni/ZrO_2-W催化剂上γ-丁内酯选择性仅为2.5%。Two kinds of ZrO2 with tetragonal phase and the same crystalline size were prepared by using water and methanol as the solvents respectively. Ni/ZrO2 catalysts with Ni mass fraction of 10% were pre- pared by impregnation method and applied in the liquid phase hydrogenation of maleic anhydride. The as- prepared catalysts were characterized by BET, XRD, H2-TPR, H2-TPD and in situ FT-IR. The results showed that although the specific surface area of ZrO2 prepared by using methanol as the solvent was obvi- ously smaller than that prepared by using water as the solvent, Ni/ZrO2-M catalyst prepared by using methanol as the solvent had stronger metal-support interaction, higher active metal dispersion and higher C=O hydrogenation activity than Ni/ZrO2-W catalyst prepared by using water as the solvent. Under the condition of reaction temperature 210 ℃, hydrogen pressure 5 MPa and reaction time 3 h, the conversion of maleic anhydride on Ni/ZrO2-M catalyst was 100% and the selectivity to γ-butyrolactone was 22.8%, while the selectivity to γ-butyrolactone on Ni/ZrO2-W catalyst was only 2.5% under the same reaction condition.

关 键 词：催化化学 顺酐加氢 Ni/Zr02催化剂 ZrO2制备方法 Γ-丁内酯 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]