活性炭负载银吸附剂的制备与脱除苯并噻吩的研究

Studies of adsorbent preparation of activated carbon loaded silver for removal of benzothiophene

采用浓硝酸氧化改性的活性炭为载体负载金属Ag制备了Ag/AC系列吸附剂,并进行了模型柴油中苯并噻吩(BT)的吸附脱除性能研究。采用N2吸附、SEM、FT-IR及XRD技术对吸附剂进行了表征。结果表明,氧化改性增加了活性炭表面酸性基团,有利于脱除弱碱性的BT。以HNO3氧化改性后的活性炭为载体负载AgCl所制备的吸附剂具有最高脱硫率达91.8%。最后探讨了AgNO3在活性炭上的吸附行为及金属Ag对BT的吸附脱除机理。

Activated carbon（AC） loaded silver as adsorbent was prepared using impregnation method to investigate its desulfurization performance for benzothiophene（BT） in model diesel.N2 adsorption,scanning electron microscope（SEM）,Fourier transform infrared spectroscopy（FT-IR） and X-ray diffraction（XRD） were adopted to characterize the prepared adsorbents.Surface acidic groups increased by HNO3 oxidation,which is conducive to the removal of weak alkaline BT.The adsorbent that AC modified with HNO3 as the carrier loaded AgCl has the highest desulfurization rate 91.8%.Finally,the adsorption behavior of AgNO3 on AC and metallic silver on the adsorption removal of BT were discussed.