The Experts below are selected from a list of 7653 Experts worldwide ranked by ideXlab platform
Wan Mohd Ashri Wan Daud - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of sulfated hierarchical nanoporous Faujasite zeolite for efficient transesterification of shea butter
Journal of Cleaner Production, 2017Co-Authors: Peter Adeniyi Alaba, Yahaya Muhammad Sani, Isah Yakub Mohammed, Yousif Abdalla Abakr, Wan Mohd Ashri Wan DaudAbstract:Abstract In this work, the transesterification of shea butter with MeOH over sulfated hierarchical nanoporous Faujasite zeolite catalysts to produce biodiesel was studied. The sulfated Faujasite zeolite was prepared from kaolin as the zeolite precursor and sulfuric acid as sulfate precursor. Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy show the successful anchoring of sulfate ions onto the Faujasite zeolite. There was a remarkable improvement in the porosity and acid strength of the Faujasite zeolite upon sulfation, though with a small reduction in density due to dealumination, which enhanced the stability. The synthesized sulfated zeolite is efficient for transesterification of shea butter and gives biodiesel yield of 96.89% at 200 °C, 5:1 MeOH/oil, and 5 wt% catalyst for 3 h. The sulfated zeolite is stable after four consecutive cycle for a reaction that proceeds at 200 °C, 5:1 MeOH/oil, 5 w% catalyst for 3 h and gave 90.76 w% in the first cycle while unsulfated zeolite gave a yield of 72.42% at the same condition due to diffusion limitation, crystal size and lower acid strength. This indicates that both pore structure and acid strength decide the activity of solid acids catalysts in biodiesel production.
Peter Adeniyi Alaba - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of sulfated hierarchical nanoporous Faujasite zeolite for efficient transesterification of shea butter
Journal of Cleaner Production, 2017Co-Authors: Peter Adeniyi Alaba, Yahaya Muhammad Sani, Isah Yakub Mohammed, Yousif Abdalla Abakr, Wan Mohd Ashri Wan DaudAbstract:Abstract In this work, the transesterification of shea butter with MeOH over sulfated hierarchical nanoporous Faujasite zeolite catalysts to produce biodiesel was studied. The sulfated Faujasite zeolite was prepared from kaolin as the zeolite precursor and sulfuric acid as sulfate precursor. Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy show the successful anchoring of sulfate ions onto the Faujasite zeolite. There was a remarkable improvement in the porosity and acid strength of the Faujasite zeolite upon sulfation, though with a small reduction in density due to dealumination, which enhanced the stability. The synthesized sulfated zeolite is efficient for transesterification of shea butter and gives biodiesel yield of 96.89% at 200 °C, 5:1 MeOH/oil, and 5 wt% catalyst for 3 h. The sulfated zeolite is stable after four consecutive cycle for a reaction that proceeds at 200 °C, 5:1 MeOH/oil, 5 w% catalyst for 3 h and gave 90.76 w% in the first cycle while unsulfated zeolite gave a yield of 72.42% at the same condition due to diffusion limitation, crystal size and lower acid strength. This indicates that both pore structure and acid strength decide the activity of solid acids catalysts in biodiesel production.
Bert F Sels - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterisation and catalytic evaluation of hierarchical Faujasite zeolites milestones challenges and future directions
Chemical Society Reviews, 2016Co-Authors: Danny Verboekend, Nicolas Nuttens, Roel Locus, J Van Aelst, P Verolme, Johan C Groen, Javier Perezramirez, Bert F SelsAbstract:Faujasite (X, Y, and USY) zeolites represent one of the most widely-applied and abundant catalysts and sorbents in the chemical industry. In the last 5 years substantial progress was made in the synthesis, characterisation, and catalytic exploitation of hierarchically-structured variants of these zeolites. Hererin, we provide an overview of these contributions, highlighting the main advancements regarding the evaluation of the nature and functionality of introduced secondary porosity. The novelty, efficiency, versatility, and sustainability of the reported bottom-up and (predominately) top-down strategies are discussed. The crucial role of the relative stability of Faujasites in aqueous media is highlighted. The interplay between the physico-chemical properties of the hierarchical zeolites and their use in petrochemical and biomass-related catalytic processes is assessed.
Yahaya Muhammad Sani - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of sulfated hierarchical nanoporous Faujasite zeolite for efficient transesterification of shea butter
Journal of Cleaner Production, 2017Co-Authors: Peter Adeniyi Alaba, Yahaya Muhammad Sani, Isah Yakub Mohammed, Yousif Abdalla Abakr, Wan Mohd Ashri Wan DaudAbstract:Abstract In this work, the transesterification of shea butter with MeOH over sulfated hierarchical nanoporous Faujasite zeolite catalysts to produce biodiesel was studied. The sulfated Faujasite zeolite was prepared from kaolin as the zeolite precursor and sulfuric acid as sulfate precursor. Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy show the successful anchoring of sulfate ions onto the Faujasite zeolite. There was a remarkable improvement in the porosity and acid strength of the Faujasite zeolite upon sulfation, though with a small reduction in density due to dealumination, which enhanced the stability. The synthesized sulfated zeolite is efficient for transesterification of shea butter and gives biodiesel yield of 96.89% at 200 °C, 5:1 MeOH/oil, and 5 wt% catalyst for 3 h. The sulfated zeolite is stable after four consecutive cycle for a reaction that proceeds at 200 °C, 5:1 MeOH/oil, 5 w% catalyst for 3 h and gave 90.76 w% in the first cycle while unsulfated zeolite gave a yield of 72.42% at the same condition due to diffusion limitation, crystal size and lower acid strength. This indicates that both pore structure and acid strength decide the activity of solid acids catalysts in biodiesel production.
Yousif Abdalla Abakr - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of sulfated hierarchical nanoporous Faujasite zeolite for efficient transesterification of shea butter
Journal of Cleaner Production, 2017Co-Authors: Peter Adeniyi Alaba, Yahaya Muhammad Sani, Isah Yakub Mohammed, Yousif Abdalla Abakr, Wan Mohd Ashri Wan DaudAbstract:Abstract In this work, the transesterification of shea butter with MeOH over sulfated hierarchical nanoporous Faujasite zeolite catalysts to produce biodiesel was studied. The sulfated Faujasite zeolite was prepared from kaolin as the zeolite precursor and sulfuric acid as sulfate precursor. Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy show the successful anchoring of sulfate ions onto the Faujasite zeolite. There was a remarkable improvement in the porosity and acid strength of the Faujasite zeolite upon sulfation, though with a small reduction in density due to dealumination, which enhanced the stability. The synthesized sulfated zeolite is efficient for transesterification of shea butter and gives biodiesel yield of 96.89% at 200 °C, 5:1 MeOH/oil, and 5 wt% catalyst for 3 h. The sulfated zeolite is stable after four consecutive cycle for a reaction that proceeds at 200 °C, 5:1 MeOH/oil, 5 w% catalyst for 3 h and gave 90.76 w% in the first cycle while unsulfated zeolite gave a yield of 72.42% at the same condition due to diffusion limitation, crystal size and lower acid strength. This indicates that both pore structure and acid strength decide the activity of solid acids catalysts in biodiesel production.
