Synthesis and Characterization of Di-Metallic Zeolite Pt-Co Composite as Potential Catalyst for Reforming and Hydro-Desulphurization of Gasoline
Published: 2023-09-23
Page: 720-729
Issue: 2023 - Volume 6 [Issue 4]
Godwin J. Udo *
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
Emmanuel E. Edemumo
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
Joachim J. Awaka-Ama
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
Emmanuel E. Ubuo
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
Emmanuel J. Ukpong
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
Emaime J. Uwanta
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
Aniedi E. Nyong
Department of Chemistry, Akwa Ibom State University, Mkpat Enin, Akwa, Ibom State, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Synthesis and characterization of di-metallic zeolite-Pt-Co composite was carried out via hydrothermal treatment, acid leaching of mesoporous-kaolin and calcination of the acidified mesoporous–kaolin. Pt and Co metals were impregnated into the zeolite matrix through thermal reduction of H2PtCl6. 6H2O and Co(CH3COO)2 at 550 oC for 6 hours using (NaBH4) as reductant with Polyvinylpyrrolidone (PVP) as stabilizer. The results of FTIR indicated absorption bands range of 1062.3-74.671 cm-1 attributed to tetrahedral stretches for AlO3 and SiO. A peak at 779.0 cm-1 stretches assigned to Pt and 650 cm-1due to Co. This may confirm the impregnation of Co and Pt- into the composite. Also, muscovite and quartz interloping where confirmed at 1031-1038 cm-1. The XRD analysis indicated 35 % sanidine [(K, Na) (Si,Al)4O8], 27 % quartz (SiO2), 24 % Orthoclase (KAlSi3O8), 8 % Albite (NaAlSi 3O 8) and 6.3% Muscuvite (KAl2(Si3Al)O10(OH)2 with sharp peaks of quartz at 20.8o 2θ, implying crystalline. The results of the Transmission Electron Microscope (TEM) results showed 16±4 nm and 7±3 nm for the calcined kaolin and the synthesized zeolite Pt-Co composite respectively. Also, TEM monograph of synthesis Zeolite-Pt-Co indicated a reduced even particle size compared to calcined zeolite clay. Pt enhances isomerization of straight run gasoline with consequent increase in octane number of gasoline while Co aids in hydrodesulphorisation.
Keywords: kaolin, zeolite, catalyst, calcination, hydrosulphorisation, isomerization
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