Describes the Physical Properties of the Catalysts Obtained on the Basis of the Characterization Techniques. the Cation Exchange Capacity (Cec) of Fly Ash Was Enhanced After Acidalkali Treatment and Metal Impregnation and This Has Been Attributed to Creation of Defect Sites and Broken Bonds on the Oxide Surfaces. Overall the Order of Increasing Cec Is As Follows
F2 > N2 > C2 > M2 > F1 >N1 > C1 > M1 > F3 > C3 > N1 > M3 >> O
Aas Measurements Showed That the Amount of Fe(Iii), Co(Ii), Ni(Ii) and Mn(Ii) Entering into the Fly Ash Material Was Different and Follow the Order of Fe(Iii) > Co(Ii) > Ni(Ii) > Mn(Ii). Xrf Results Confirm That Silica Is the Major Oxide and All the Fly Ash Catalysts Belong to Class F Type Fly Ash. the Loi Value (Ww ) Also Increased After Metal Impregnation.
The Xrd Spectra Could Show the Differences In Crystallinity and Other Properties In Terms of the Changes In the Diffraction Bands of the Fly Ash Catalysts Before and After Acidalkali or Metal Impregnation Treatment. These Results Were Supplemented With the Ft–Ir Study. It Was Observed That the M–O Stretching Band Shifted After Acid and Alkali Treatment of the Fly Ash For All the Eight Catalysts. However, Formation of New Bonds Was Not Observed In any of the Cases, Indicating Little Change In Chemical Properties of the Metal Oxides.
Scanning Electron Micrographs Showed That the Surfaces Became Rough and More Porous After Treatment of the Fly Ash With Acid and Alkali. After Metal Impregnation, the Grai ...