The present work reports the effect of different functionalization methodologies on surface modification of porous carbon and its efficacy for benzene adsorption. The virgin and surface-modified adsorbents were characterized by FTIR, N₂ sorption analysis, SEM, and Boehm titration. The adsorption isotherms were measured at different temperatures using a highly sensitive magnetic suspension microbalance. At lower benzene concentration, the virgin carbon was found to possess reasonable adsorption capacity, while at higher benzene concentration, the surface-modified carbon tends to perform better. The maximum benzene adsorption capacity at 25 °C and vapor pressure of 90 mbar is as follows: 467 mg/g (NORIT-AC), 227 mg/g (AC-APS (1 M)), 388 mg/g (Norit-AC-HT), 492 mg/g (AC-HNO₃), and 531 mg/g (AC-H₂SO₄).

本工作报告了不同功能化方法对多孔碳表面改性及其吸附苯的功效的影响。通过FTIR，N ₂吸附分析，SEM和Boehm滴定对未吸附和表面改性的吸附剂进行表征。使用高度灵敏的磁悬浮微量天平在不同温度下测量吸附等温线。在较低的苯浓度下，发现原始碳具有合理的吸附能力，而在较高的苯浓度下，表面改性的碳趋于表现更好。在25°C和90 mbar的蒸气压下，最大苯吸附量如下：467 mg / g（NORIT-AC），227 mg / g（AC-APS（1 M）），388 mg / g（Norit- AC-HT），492 mg / g（AC-HNO ₃）和531 mg / g（AC-H ₂ SO ₄）。