Preparation of polyacrylonitrile-based activated carbon fiber for CS2 adsorption

Abstract

Polyacrylonitrile (PAN)-based activated carbon fiber (ACF) was prepared by CO2 and KOH activation method, respectively, and used for the adsorption of CS2 at room temperature. The adsorbents were characterized by scanning electron microscope, CO2-temperature-programmed desorption and Fourier transform infrared spectroscopy. The adsorption activity of ACF prepared by different conditions (preoxidation process, carbonization temperature, CO2 activation temperature and time, carbon/KOH ratio, KOH activation temperature and time) was studied. The best breakthrough adsorption capacity of CS2 was 55.63 mgS/g when the ACF was activated by CO2 [ACF(I700)-CO2(900 + 90)]. The best breakthrough adsorption capacity of CS2 was 49.52 mgS/g when the activator was KOH [ACF(I700)-KOH(1:1 + 900 + 60)].