采用混捏法制备了添加不同质量分数氧化钼的Raney Ni-Al₂O₃吸附剂，并利用XRD、BET、SEM、XPS等手段对吸附剂进行表征，采用连续固定床反应装置评价吸附剂的脱硫性能。结果表明，当氧化钼负载量为1%时，Raney Ni-Al₂O₃吸附剂吸附活性最强，比表面积和孔径均达到最大，分别为68.45 m²/g、15.24 nm。此时Raney Ni-Al₂O₃吸附剂在固定床反应器中对苯中噻吩的脱硫性能最高，饱和硫容达到最大，为35.17 mg/g。MoO₃添加量过高时会使吸附剂中的镍产生NiMoO₄晶相，堵塞吸附剂表面孔道，骨架镍海绵状结构特征不再明显，吸附活性大大降低。与未改性的Raney Ni-Al₂O₃吸附剂相比，添加1% MoO₃后的吸附剂表面分布更多的金属镍和氧化镍。

Raney Ni-Al₂O₃ adsorbents with different molybdenum oxide contents are prepared via the kneading method,and characterized by XRD,BET,SEM,XPS,H₂-TPR and other means.Using benzene containing 100 mg·kg^-1 thiophene as the target,the desulfurization performances of the adsorbents are evaluated in WFD-3030 fixed bed reactor.The result shows that the adsorption activity of Raney Ni-Al₂O₃ adsorbent is the strongest and its specific surface area and pore size reach the largest,which are 68.45 m²·g^-1 and 15.24 nm,respectively when the loading of MoO₃ is 1%.Such an adsorbent has the best adsorption activity for thiophene in benzene in the fixed bed reactor,with the saturated sulfur capacity reaching the maximum,35.17 mg·g^-1.XRD and SEM results show that too high amount of MoO₃ can cause NiMoO₄ crystal phase to form in nickel in the adsorbent,which will block the pores on the surface of the adsorbent.The sponge-like structure of the framework nickel will no longer be obvious,resulting in a decrease in adsorption activity.XPS characterization results also show that compared with the unmodified Raney Ni-Al₂O₃,the 1% MoO₃/Raney Ni-Al₂O₃ adsorbent has more metallic nickel and nickel oxide distributed on its surface.

瞿颖男(1997-),女,硕士研究生,研究方向为催化新材料及新工艺,2232498721@qq.com