RESEACHING THE ADSORPTION SO2 IN GAS BY COCONUT SHELL ACTIVATED CARBON

Abstract

A mixture  contained  SO2 3000 ppm (model  gas) was adsorbed  by using  a fixed  layer of two types of coconut shell activated carbon  in different  spesific area and  particle sizes. With the volume of the  layer coconut  being 70 ml (30 -  35 g), the average de-sulfur  grade was reached 98%  within  early  60  minutes,  and  was  decreased  to  50%  after  280  minutes.  The  dynamic adsorption  capacity  was  reached  40  mg/g  after  300  minutes.  The  adsorption  capacity,  the adsorption  rate  and  the  effect  of  de-sulfur  process  are  higher  for  the  adsorbents  with  higher specific  surface  area  and  for  smaller  particle  sizes. It  indicated  that  the  internal  transportation plays an important roll in the adsorption process.