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 al.