The increasing demand for sustainable and low-cost catalysts for biofuel upgrading has stimulated research into the utilization of agricultural wastes such as rice husk and eggshell for catalyst synthesis. This seminar discusses the preparation, characterization, and catalytic potential of NiCo/SiO₂and CaO/Al₂O₃. Catalysts synthesized from rice husk and eggshell, respectively. Rice husk serves as an abundant renewable source of silica, while eggshell is a rich source of calcium carbonate that can be converted into calcium oxide through calcination. The synthesized catalysts were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer–Emmett–Teller (BET) surface area analysis, and thermogravimetric analysis (TGA) to evaluate their structural, thermal, and surface properties. Results revealed that the catalysts possess high surface area, mesoporous structures, and good thermal stability suitable for heterogeneous catalytic applications. NiCo/SiO₂ catalyst exhibited enhanced surface area and porosity due to silica derived from rice husk, while The CaO/Al₂O₃ catalyst showed excellent basic characteristics. The study highlights the importance of converting agricultural waste into valuable catalytic materials for biofuel production and environmental sustainability. The utilization of waste-derived catalysts offers economic, environmental, and industrial benefits by reducing waste disposal problems and promoting sustainable energy development.