The Desulfurization and Removal of Sulfurous and Organo-phosphurous Compounds via Using MnO2 Nanoparticles/Zeolite AgYComposite Catalyst



In this research, zeolite NaY molecular sieve was prepared by a hydrothermal method. Then, silver ions
were replaced in the zeolite NaY with silver nitrate (AgNO3) solution viausingion exchange (IE) method for the
preparation of zeolite AgY. In the next step, the Manganese dioxide (MnO2) nanoparticles (9.3 and 15.8 wt %) as
guest were deposited in the zeolite AgY(as host) structure with Mn(NO3)2 aqueous and KMnO4 solutions via
confined space synthesis (CSS) method. Synthesized samples were studied and characterized via SEM/EDAX,
XRD and FTIR techniques. The desulfurizationand removalreactions of sulfurous compounds ofchloroethyl ethyl
sulfide (CEES), chloroethyl phenyl sulfide (CEPS) and organo-phosphurouscompounds ofdemeton and dimethyl
methyl phosphonate (DMMP)have been investigated by 15.8 wt% Nano MnO2/Zeolite AgY composite via the
influences of various parameters such as solvent and time by using gas chromatography (GC) and 31PNMR.
Then, products of the elimination and destruction reactions were identificated via gas chromatography-mass
spectrometry (GC-MS). These products have less toxic to compare sulfurous and organo-phosphurous
compounds under reaction.