difference between the two systems is presumably due to the nature
of cellulosic materials present in coffee ground and olive solid
wastes. Moreover, Reffas performed the activation under air,
whereas inert atmosphere was used in this work. Under air, the
carbonized charcoal undergoes oxidation and burning, which may
wash it away, whereas under inert atmosphere such a burning
process does not occur. The challenge in this work is to produce AC
materials with high surface areas while avoiding charcoal burnout.
The phosphoric acid examined here seems not a good activating
agent for the stated objectives of this work.
The ZnCl2/450-AC, showed more porous structure than
the H3PO4/450-AC. Activation at higher temperatures, 600 or
750 _C did not cause significant enhancement in porosity, and was
thus avoided for cost and energy saving purposes. A closer look at
the SEM image for the ZnCl2/450-AC shows that the solid has
difference between the two systems is presumably due to the natureof cellulosic materials present in coffee ground and olive solidwastes. Moreover, Reffas performed the activation under air,whereas inert atmosphere was used in this work. Under air, thecarbonized charcoal undergoes oxidation and burning, which maywash it away, whereas under inert atmosphere such a burningprocess does not occur. The challenge in this work is to produce ACmaterials with high surface areas while avoiding charcoal burnout.The phosphoric acid examined here seems not a good activatingagent for the stated objectives of this work.The ZnCl2/450-AC, showed more porous structure thanthe H3PO4/450-AC. Activation at higher temperatures, 600 or750 _C did not cause significant enhancement in porosity, and wasthus avoided for cost and energy saving purposes. A closer look atthe SEM image for the ZnCl2/450-AC shows that the solid has
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