Preparation of densified activated carbons and their methanol vapor adsorption characteristics

Abstract

An activated carbonmethanol pair is one of the most promising working-pair of adsorption cooling systems. Densified activated carbons had been prepared as new adsorbents by mechanical compression through the addition of small amount of polytetrafluoroethylene (PTFE) powders. The present study dealt with the preparation of high-density activated carbon fiber (HDACF), and experimental and theoretical investigations of the adsorption behaviors of methanol vapor on the HDACFs. Under the experimental conditions employed in this study, the molded ACF with a larger apparent density adsorbed more rapidly methanol vapor. This adsorption behavior is attributed to a faster removal of heat of adsorption from the HDACF. The numerical analysis results showed a rough agreement with the experimental results on transient behaviors of adsorption uptake and temperature of HDACF.