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New zeolite made from Tunisian raw clay: study and modeling for C3H6 breakthrough dynamic adsorption onto zeolite material

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Abstract

In this study, Tunisian raw clay (RC) was utilized as a cheap source of silicium and aluminum for the preparation of faujasite zeolite (FAUsyn) using the alkaline fusion technique. The zeolite’s structural analysis was carried out using the XRD, nitrogen adsorption–desorption, and SEM–EDX techniques. The data collected demonstrate that the produced zeolite only included one homogeneous faujasite phase. Textural analysis shows that the FAUsyn prepared from RC has a hierarchical porosity (micro-, meso-, and macropores). The total porosity was found to be 0.33 cm3/g as well as the BET area was equal to 360 m2/g. Adsorption experiments for propene capture were performed using the FAUsyn as adsorbent material. The performance of the column was examined in relation to various parameter impacts, including flow rate (50, 100, and 150 mL/min), input concentration (4, 8, and 12 mg/L), and bed depth (10, 14, and 18 cm). Finally, experimental and theoretical studies were investigated to predict adsorption capacities and kinetics parameters. To clarify and estimate column inputs, a model that incorporates axial dispersion, Langmuir equation, and migration within the adsorbent’s pore was improved. COMSOL Multiphysics software was used to execute the model and resolve it computationally. The results of the experiments and the expected breakthrough curves were very well agreed. Modeling obtained results can be extrapolated to industrial level.

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Nadim Fakhfakh, Olfa Ouled Ltaief, Nesrine Dammak, Stéphane Siffert, and Mourad Benzina. The first draft of the manuscript was written by Nadim Fakhfakh and Olfa Ouled Ltaief and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Nadim Fakhfakh.

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Highlights

• Zeolite synthesized from raw Tunisian clay is an effective adsorbent for the treatment of C3H6 emissions.

• The results of structural characterization show that prepared zeolite presented only one phase of a pure faujasite type with a hierarchical porosity (trimodal macro-meso-microporous structure).

• Experimental breakthrough curves at different bed heights, flow rate and inlet C3H6concentrations were studied.

• A suitable adsorption model has been developed to simulate the measured data, based on the nature of the various equilibrium relationships solid-gas and diverse descriptions of the mass transfer processes within of the adsorbent particle.

• The experiments can be always reproduced by simulation with high correlation coefficients.

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Fakhfakh, N., Ltaief, O.O., Dammak, N. et al. New zeolite made from Tunisian raw clay: study and modeling for C3H6 breakthrough dynamic adsorption onto zeolite material. Environ Sci Pollut Res 31, 29357–29373 (2024). https://doi.org/10.1007/s11356-024-32970-2

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  • DOI: https://doi.org/10.1007/s11356-024-32970-2

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