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Several batches of chars were prepared from palm shell by carbonization in a¯ow of nitrogen using a ®xed-bed reactor. Palm shell was carbonized at temperatures of 500, 600, 700, 800 and 900°C for 1 h to study the effects of carbonization temperature on char yield and its porosity. The prepared chars were characterized for the micropore volume using CO 2 adsorption while the meso-and macropore volumes were analyzed using a mercury porosimeter. The char yield was around 25% and is comparable with yields reported from other lignocellulosic materials. The results show that carbonization temperature has a signi®cant effect on the micro-and mesopore volumes. However, it has negligible effect on the macropore volume.

A series of experiments were conducted to investigate the effect of activation temperature on pore development of activated carbon produced from palm shell. Activation of the samples was carried out at 800, 850 and 900°C for different durations ranging from 10 to 180 min. The samples were characterized using N 2 adsorption for evaluation of micropores and the mercury intrusion technique for mesopore and macropore analysis. Within the range of activation temperatures studied, high burnoff products derived from high activation temperatures tend to have larger micropore development. However, an increase in the activation temperature has no remarkable effect on mesopore and macropore development.

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