Catalytic Oxidative Desulfurization of Heavy Naphtha with Hydrogen Peroxide in the presence of Catalyst (PMN550)

ALMhanawi, Najm; Mutar, Mohammed Ali

	Catalytic Oxidative Desulfurization of Heavy Naphtha with Hydrogen Peroxide in the presence of Catalyst (PMN550)
Kerbala Journal for Engineering Sciences
Article 2, Volume 2, Issue 1, March 2022, Pages 11-30 PDF (1.17 M)
Document Type: Research Article
Authors
Najm ALMhanawi^* ¹; Mohammed Ali Mutar²
¹University of Al-Qadisiyah, College of Engineering, Chemical Engineering Department
²College of Sciences, University of Al-Qadisiyah, Al- Qadisiyah, Iraq
Abstract
Catalytic oxidative desulfurization of the heavy naphtha fractions has been researched with the use of the air-assisted formic acid and H2O2 oxidation in the presence of the natural zeolite (PMN 550 )as the catalyst. The catalyst used was synthesized in the lab. and identified through FT-IR, AFM, BET, XRD, XRF, SEM, and TGA thermal analyses showed that the prepared catalyst has an efficient catalyst characteristic. The yield of the desulfurization in the cases of HN has been increased in the presence of the natural zeolite (PMN-550) and HN’s sulfur content has been decreased from 651.3 ppm to < 10 ppm in a 60 min period at a temperature of 90 Co, which has resulted in subsequent removal of sulfur compounds from octane phase. This oxidative treatment effectively reduced the sulfur content of heavy naphtha, and adsorption with PMN550 further reduced the sulfur content to below 9 mass ppm. A batch reactor was used to evaluate the performance of the prepared catalyst at different reaction temperatures (20-120 °C), and batch time (20-140 min.) with different amounts of natural zeolite (PMN550) catalyst. Numerous parameters of the design have been utilized for the determination of factors giving the optimal sulfur content removal from the HN in the batch modes. The studied operating conditions were the ratio of H2O2 to heavy naphtha, temperature, solution pH, catalyst weight and contact time.
Keywords
Catalytic oxidative desulfurization (CODS); Catalyst (PMN550); hydrodesulfurization (HDS); organosulfur compounds; extraction

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