微反应器制备镁铝尖晶石介孔材料及其性能评价  

Preparation of magnesium-alumina spinel mesoporous materials in micro-reactor and evaluation of it’s properties

作　　者：王玉军[1] 张建辉 李孟华 王东军 贾云刚 姜伟 赵仲阳 金书含 辛颖 WANG Yujun;ZHANG Jianhui;LI Menghua;WANG Dongjun;JIA Yungang;JIANG Wei;ZHAO Zhongyang;JIN Shuhan;XIN Ying(Department of Chemical Engineering,Tsinghua University,Beijing 100195,China;PetroChina Petrochemical Research Institute,Beijing 100195,China)

机构地区：[1]清华大学化学工程系,北京100195 [2]中国石油石油化工研究院,北京100195

出　　处：《中国粉体技术》2020年第3期1-6,共6页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:21878169。

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1000℃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%。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 1000℃.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%.

关 键 词：膜分散微反应器 共沉淀法 镁铝尖晶石 加氢脱氧 

分 类 号：TQ426.65[化学工程]