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采用共沉淀法成功制备了NiO-ZnO、NiO-ZnO/凹凸棒石(ATP)和NiO-ZnO/TiO_2/ATP纳米复合吸附剂。通过N2吸附-脱附、透射电镜及X射线衍射和程序升温还原技术对3种吸附剂进行表征,并通过动态吸附实验研究3种吸附剂对苯并噻吩的吸附性能。结果表明:NiO-ZnO/TiO_2/ATP纳米复合吸附剂具有较高的比表面积、较小的颗粒尺寸、更好的NiO分散,而且NiO与ATP之间的相互作用较弱,易被还原成脱硫活性更高的Ni。该吸附剂在压强0.5MPa,H2流量为60mL/min,400℃纯氢气氛下还原5h后,在反应压力1.0MPa,温度400℃,进料液体速率为20mL/h,氢油比为200的条件下可将模拟油中硫含量从80×10-6降至10×10-6,其穿透硫容为161.3mg/g,比NiO-ZnO吸附剂提高14.5%。
NiO-ZnO, NiO-ZnO / attapulgite (ATP) and NiO-ZnO / TiO_2 / ATP nanocomposite adsorbents were successfully prepared by coprecipitation method. Three adsorbents were characterized by N2 adsorption-desorption, transmission electron microscopy, X-ray diffraction and temperature programmed reduction. The adsorption properties of benzothiophene by three adsorbents were studied by dynamic adsorption experiments. The results show that the NiO-ZnO / TiO_2 / ATP nanocomposite adsorbent has higher specific surface area, smaller particle size and better dispersion of NiO, and the interaction between NiO and ATP is weaker and easily reduced to desulfurization More active Ni. Under the conditions of pressure 0.5MPa, H2 flow rate 60mL / min and pure hydrogen atmosphere at 400 ℃ for 5h, the reaction was carried out at a pressure of 1.0MPa, a temperature of 400 ℃, a feed liquid rate of 20mL / h and a hydrogen-to-oil ratio of 200 Under the conditions, the sulfur content in simulated oil can be reduced from 80 × 10-6 to 10 × 10-6, and the penetrating sulfur capacity is 161.3mg / g, which is 14.5% higher than that of NiO-ZnO adsorbent.