Effective utilization of useful components present in agricultural Bio-waste materials for different catalytic reactions is the main objective of this thesis book. Among several agricultural Bio-waste materials Rice Husk and Rice straw are maximumly available in Krishna district, Andhra Pradesh. Preparation of high surface area and pore volume initiated activated carbons and silica from Agricultural bio-mass materials like Rice husk(RH). Study of textural properties of AC's and Silica prepared from biowaste materials. Characterization of supports prepared by using XRD, FT-IR, Py-FTIR, TPR, TGA. To find out the efficient catalyst for CO2 capture by using the volumetric method. Comparative studies of CO2 capture over different amine-functionalized rice husk ash samples. Dehydration of alcohols using chromium supported on rice husk ash catalysts. Study of activity of Ni supported on rice husk extracted silica catalysts for conversion of Levulinic acid to gamma-Valerolactone. Comparative study of catalytic functionalities of Ni catalysts supported on activated carbons and silica for hydrogenation of nitrobenzene