The sea sand was sieved (0.42 mm) to remove larger particles,
which were crushed and the material passed through the same
sieve before being subjected to heat treatment in a furnace to
transform the CaCO3 (sand major component) into CaO. The effect
of heat treatment on catalyst crystallinity was studied. Three calcination
temperatures (700, 800 and 900 C) were evaluated. The
time of calcination was kept constant (2 h) at all treatments.