BET analysis was performed on Egg shell-CaO-900, Egg shellCaO-900-600
and commercial CaO to determine the specific
surface area. The surface area of a solid catalyst has direct impact
on its catalytic activity, and hence the higher surface area
catalyst is expected to have higher catalytic activity [13].
Hydration and dehydration treatments play a vital role in
improving the surface area of a catalyst [27]. As shown in Table
2, the surface area of the commercial CaO and Egg shellCaO-900
was found to be 3.0022 m2
/g and 3.7262 m2
/g, respectively.
However the surface area of CaO obtained from the calcination–hydration–dehydration
treatment of egg shell (Egg
shell-CaO-900-600) was determined as 8.6401 m2
/g. These results
are in accordance with the findings of Yoosuk et alThe surface area of the CaO obtained from the calcinations
of calcium carbonate subjected to hydration–dehydration
treatment was twice that of CaO obtained from the calcination
of calcium carbonate