WASTE EGGSHELLS AS CATALYSTS: AN ENVIRONMENTALLY-FRIENDLY APPROACH

Sustainability is crucial for the survival of mankind, ecosystem for the development of society. There have been huge amount of waste have been dumped which creates pollutions. Hence, from Green chemistry perspective it is a protocol to design heterogeneous catalysts which can yield products from waste products with minimization of wastes pollution with environmentally friendly heterogeneous catalytic process for the developed environmentally friendly products with longevity. Such green synthesized heterogeneous catalysts will replace the existing homogeneous process to heterogeneous catalysts being developed from waste materials. This abstract highlight key aspects on the preparation of heterogeneous catalysts derived from waste materials such as egg shell, rice husk for synthesis of Ag Nanoparticles developed, which can applied for biomass conversions, to environmental remediation, heterogeneous catalysts for organic transformations. These egg shell CaO catalysts are characterized using analytical techniques, such as: X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), Thermogravimetric-Differential Thermal Analyzer (TG-DTA), Scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET) surface area, which gives its complete picture of its structure, porosity, morphology, thermal stability, reusability, and activity of catalysts. Hence heterogeneous catalysts developed from egg shell wastes and medical plants will become increasingly popular since two decades. Since, the egg shell waste is developed into egg shell CaO catalysts for cleaner, reusable, eco-friendly catalysts for economic growth for Namibia and other developing and underdeveloped countries.