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采用铝阳极氧化法制备了Al2O3-Al一体型多孔氧化铝载体,再采用电沉积技术将TiO2沉积到氧化铝多孔的纳米孔道内,制备了催化精馏专用SO42-/TiO2-Al2O3-Al型固体酸催化剂,并以乙酸乙酯合成为模型反应,考察了水封条件,电沉积电压、电沉积时间等制备工艺条件对催化剂活性的影响.实验结果表明,适宜的制备条件为水封温度为50℃,水封时间为1 h,电沉积电压为6V,电沉积时间为30 min,在此制备条件下,醋酸转化率为31.34%.采用扫描电镜(SEM),X射线衍射分析(XRD)手段对所制备催化剂进行了表征.结果表明:阳极氧化铝膜的结构为无定型结构,TiO2在载体上呈高度分散状态.
Al 2 O 3 -Al porous alumina carrier was prepared by aluminum anodic oxidation method, and then TiO 2 was deposited into porous alumina pores by electrodeposition technology to prepare SO42- / TiO2-Al2O3-Al solid solution Acid catalyst and ethyl acetate synthesis as a model reaction, the effects of preparation conditions such as water-seal conditions, electrodeposition voltage and electrodeposition time on the catalyst activity were investigated.The experimental results show that the suitable preparation conditions are as follows: water seal temperature is 50 ℃, the time of water sealing was 1 h, the electrodeposition voltage was 6V, the electrodeposition time was 30 min, the conversion rate of acetic acid was 31.34% .Using scanning electron microscopy (SEM), X-ray diffraction (XRD) The prepared catalyst was characterized.The results show that the structure of anodic aluminum oxide is amorphous and TiO2 is highly dispersed on the support.