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Respected Speaker for CAT 2021 Conference - Muhammad Naseem Akhtar
Muhammad Naseem Akhtar
King Fahd University of Petroleum & Minerals, Saudi Arabia
Title : Aromatization of propane using GaAlMFI based catalyst

Abstract:

The aromatization of propane was performed over MFI-type Gallo-alumino-silicate (GaAlMFI) catalysts shaped to extrudates using nano-sized oxides (i.e. SiO2 or Al2O3). The GaAlMFI zeolites were hydrothermally synthesized having different Ga/(Ga+Al) and Si/(Ga+Al) ratios. It was observed that propane conversion and aromatic yield depend mainly on zeolite components in the case of either with or without nano-sized oxide. Both propane conversion and the aromatic yield on the catalyst were increased with an increase in Ga/(Ga+Al) ratio until an optimum value of ~0.3 in the zeolite. The dehydrogenation was increased with an increase in the Ga/(Ga+Al) ratio of the zeolite component due to an increase in non-framework (nfw) gallium species. The selectivity of aromatization to cracking (A/C) ratio in the case of the shaped catalyst with nano-sized oxides was remarkably increased with an increase in Ga/(Ga+Al) ratio of zeolite component due to a decrease in strong acid sites. The propane conversion and aromatic yield were also observed to increase with the increase in Si/(Ga+Al) ratio until an optimum value of ~20 and then dropped sharply. The A/C ratio passed through a maximum corresponding to the optimum value of ~20 for the Si/(Ga+Al) ratio and then decreased with an increase in the Si/(Ga+Al) ratio. The performance of the catalyst with nano-sized Al2O3 was better than that of the catalysts with nano-sized SiO2 or without nano-sized oxides. The calcination temperature of 550 ?C for the zeolite in the catalyst of GaAlMFI with nano-sized Al2O3 was observed to be the optimum resulting in maximum propane conversion and aromatic yield. The degree of aromatization to dehydrogenation (A/D) and A/C ratios were observed to pass through maxima at a calcination temperature of 550 ?C and then decreased with further increase in calcination temperature. It was confirmed by XPS that the nano-sized alumina promotes the formation of non-framework gallium species.

Biography:

Dr. M Naseem Akhtar is a Research Scientist at King Fahd University of Petroleum and Minerals. He received his Ph.D. degree in Chemistry in 1996 from KFUPM, Dhahran, Saudi Arabia. Dr. Akhtar’s contributions in the field of petrochemicals & polymers are of great significance which addresses the developing technologies for polyolefin catalysis and conversion of low-value petroleum feedstocks into high-value petrochemicals products. He has been actively involved in several projects related to petrochemicals & polymers.  He is the Principal investigator in the KFUPM-Caltech research collaboration program on catalysis. He has published several patents and papers in reputable journals, his research work has been widely cited in scientific literature and technical reports.

 

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