The collected chicken eggshells were rinsed thoroughly with tap water until the organic matter was removed. The washed eggshells were again rinsed twice with distilled water and were dried in hot air oven at 100–120 °C for 24 h. The dried eggshells were powdered in an agate mortar and the powder form was calcined at three different temperatures 500, 700 to 900 °C in muffle furnace for 4 h (heating rate 2° min−1) and then stored in a desiccator. Material thus obtained was the CaO(cesp) and used for transesterification and preparation of metal impregnated CaO(cesp) based catalysts. The incorporation of metals was carried out by impregnation of the metal oxide on CaO support by using wet-incipient method with aqueous solutions of their metal nitrates. 5 gm of CaO(cesp) was suspended in 30 mL of deionized water. To this 5 mL of aqueous solution of 3 wt% of metal nitrate was added. The reaction mixture thus obtained was stirred for 4 h at room temperature. The reaction mixture was filtered and the solid material was dried in air, then in oven at 120 °C for 4 h and finally calcined in a muffle furnace at three different temperatures 500, 700 to 900 °C in muffle furnace for 4 h (heating rate 2° min−1). The catalysts thus prepared were characterized by powder XRD, BET surface area measurement, SEM and FT-IR techniques.