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采用离子交换法,将不同价态的金属离子Ag+,Ni2+,Ce3+交换到铝化的大孔径SBA-15介孔材料(SBA-15-L)上,制备了吸附剂Ag/Al-SBA-15-L,Ni/Al-SBA-15-L,Ce/Al-SBA-15-L。脱硫实验表明,所制备的吸附剂可将硫含量为0.015(wt)%的模拟航空煤油,脱硫至硫含量低于0.0001(wt)%,并且Ag/Al-SBA-15-L的吸附脱硫能力强于Ni/Al-SBA-15-L和Ce/Al-SBA-15。通过ICP-AES分析表明,在铝化的大孔SBA-15上,Ag+的交换量分别是Ni2+和Ce3+的13和65倍。达到吸附饱和时,每个活性中心离子Ag+、Ni2+、Ce3+上可分别吸附0.027,0.570,0.752个硫原子,即金属离子固有的吸附脱硫能力为Ce3+>Ni2+>Ag+。
Adsorption of Ag / Al-SBA-15 onto the aluminized macroporous SBA-15 mesoporous material (SBA-15-L) was achieved by the ion exchange method, using different valences of Ag +, Ni2 + and Ce3 + -L, Ni / Al-SBA-15-L, Ce / Al-SBA-15-L. Desulfurization experiments show that the prepared adsorbents can desulfurize simulated aviation kerosene having a sulfur content of 0.015 wt% to less than 0.0001 wt% and the adsorption desulfurization capacity of Ag / Al-SBA-15-L Stronger than Ni / Al-SBA-15-L and Ce / Al-SBA-15. Analysis by ICP-AES showed that the exchanged amount of Ag + was 13 and 65 times that of Ni2 + and Ce3 +, respectively, on the aluminized macroporous SBA-15. When the adsorption saturation is reached, 0.027, 0.570 and 0.752 sulfur atoms can be adsorbed on each of the active center ions Ag +, Ni2 + and Ce3 +, that is, the intrinsic adsorption desulfurization ability of the metal ions is Ce3 +> Ni2 +> Ag +.