Encapsulation of N,N-ethylenebis(salicylamide) Metal Complexes In Fly ash Based Zeolite, Characterization and Catalytic Activity

S. Sheeba Thavamani,T. Peter Amaladhas

doi:10.5185/amlett.2012.7380

Abstract

Coal fly ash has been used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment. The synthesized fly ash based zeolite (FAZ) has been characterized by various analytical techniques. Copper(II), Nickel(II) and Zinc(II) complexes of N,N 1 -ethylenebis (salicylamide) encapsulated in the supercages of FAZ have been prepared by flexible ligand method and characterized by Fourier Transform infra red spectroscopy (FTIR), X-ray diffraction (XRD) analysis, Scanning electron microscopy (SEM), Atomic absorption spectrometry (AAS), Ultra Violet – Visible spectroscopy and Thermo gravimetric analysis (TGA). These complexes have been found to catalyze the liquid phase hydroxylation of phenol with hydrogen peroxide to yield catechol. It appears to be the first report of catalysis of metal complex encapsulated in fly ash based zeolite.

Highlights

With the rapid hike in human population and developmental activities, a great threat is caused to the environment due to the industrialization and urbanization
The formation of zeolite from fly ash occurs in three stepsviz., dissolution, deposition and crystallization
As the zeolite crystallization progresses, the surface of the coal fly ash is covered with deposited zeolite in the alkaline solution [18]

Summary

Introduction

With the rapid hike in human population and developmental activities, a great threat is caused to the environment due to the industrialization and urbanization. Thermal power plants are important for generating electricity, they produce huge quantities of fly ash. Fly ash is considered as a hazardous waste and disposed in special landfills. Dumping of fly ash in land produces a great threat to the environment endangering soil, surrounding vegetation as well as ground water around disposal ponds [1]. It is becoming increasingly difficult to obtain more land for land filling purpose due to high population density. For sustainable development of the thermal power projects in India, one of the main considerations should be on efficient disposal of ash and its utilization to avoid environmental pollution and reduce land requirement

Methods

Results

Conclusion