摘要：采用膜分散微反应器,利用共沉淀法研究镁铝尖晶石介孔材料的制备条件,考察合成条件对镁铝尖晶石纯度、晶粒尺寸、晶体相态和孔结构的影响,并成型得到Ni-Mo-MgAl₂O₄-γ-Al₂O₃催化剂;以质量分数为20%的小桐籽油为反应原料,在高温、高压加氢脱氧装置中对催化剂的加氢脱氧性能进行评价。结果表明:原料金属盐溶液浓度总和为0. 5 mol/L(其中镁、铝金属的物质的量比为1∶2)、反应pH为11、表面活性剂CTAB浓度为0. 001 mol/L、焙烧温度为1 000℃时,制备得到的镁铝尖晶石介孔材料具有较大的介孔面积和介孔体积;Ni-Mo-MgAl₂O₄-γ-Al₂O₃催化剂具有较大的比表面积和良好的机械稳定性、水热稳定性;在温度为360～390℃、压力为4. 0 MPa、空速为5. 0 h-1、氢油质量比为200的工艺条件下,加氢脱氧油的收率大于79%。

关键词：膜分散微反应器；共沉淀法；镁铝尖晶石；加氢脱氧

Abstract: The preparation conditions of magnesium－alumina spinel mesoporous materials were studied by co-precipitation method in a membrane dispersion micro-reactor．The effects of preparation conditions on purity，grain size，crystal phase and pore structure of magnesium－alumina spinel were investigated，and Ni－Mo /MgAl₂O₄ －γ-Al₂O₃ catalyst was formed; The hydrodeoxidized performance of the catalyst was evaluated in a high temperature and high pressure hydrogenation plant with 20% tung seed oil as feed．The results show that the magnesium－alumina spinel mesoporous materials with high mesoporous area and mesoporous volume are obtained under the concentration of raw material concentration 0．5 mol /L ( the ratio of Magnesium and aluminum was 1∶2) ，solution pH of 11，the concentration of CTAB 0．001 mol /L，and the calcination temperature 1 000 ℃．Ni－Mo /MgAl₂O₄－γ-Al₂O₃ catalyst has high specific surface area and good mechanical and hydrothermal stability．Under the conditions of temperature from 360 to 390 ℃，pressure 4．0 MPa，airspeed 5．0 h － 1 ，hydrogen-oil ratio 200，the yield of hydrodeoxidized oil is over 79% ． 

Keywords: membrane dispersion microreactor; co-precipitation method; magnesium－alumina spinel; hydrogenation deoxidization