Scanning Electron Microscopy (SEM) analysis was performed
to confirm the morphology of the catalyst using a High Resolution
Scanning Electron Microscope (Model: F E I Quanta
FEG 200). The surface areas of Egg shell-CaO-900, Egg
shell-CaO-900-600 and commercial CaO were determined by
BET analysis using an ASAP 2020 surface area analyzer
(Micromeritics). Basic strength of the catalyst was measured
using the Hammett Indicator Titration.