Dog conch shells contain carbonate compounds (CaCO3) which can be conversed to CaO through a calcination process at a temperature of 700-900 ºC. CaO is an active catalyst in the transesterification biodiesel reaction. One of the thing that can we do to increase the effectivenes of CaO catalyst in biodiesel production is by impregnated the alkaline metal in CaO. The alkaline metal insertion pro…