Preparation and Adsorptive Desulfurization Performance of Modified Activated Carbons

The activated carbon was modified by different mass fraction of acid,treatment time,calcination temperature and other conditions.The adsorption performance for thiophene with the modified activated carbons was investigated by static equilibrium method.The specific surface area for three activated carbon adsorbents were detected and analyzed by BET characterization method.The experimental results show that: the desulfurization performance of the modified activated carbons is optimal(about 71.0%) at HNO3 mass fraction of 50%,100℃ and 6 h.Compared with the untreated groups,the desulfurization rate of modified activated carbon increased(about 20%) through high calcination temperature under inert atmosphere,the analysis results indicate that the impact of the physical microstructure is not a major factor.