Study on Modification of Activated Carbon in Adsorptive Desuifurization

Activated carbon was modified by ash removal,oxidation and impregnating with metal activated components to investigate its desulfurization performance for thiophene in model,BET,SEM,TEM and FTIR methods were used to characterize the pore structure and micro-nature of the activated carbon.The effect of the loading amounts and immersion time of adsorbents on desulfurization performance were studied.The optimum preparation conditions for the AC were obtained as follows:the activated carbon based adsorbents which were de-ashed by HCl,oxidized with HNO3 and impregnated with Co(NO3)2 molarity of 20% for 12 hours show the best desulfurization performance with 88.6% desulfurization rate.Possible adsorptive mechanism that Co has a stronger adsorption removal ability with thiophene through M-S complexion effect which was also studied at last.