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Louadj, Amel,Bouras, Omar,Rebahie, Ihssene,Cheknane, Omar,Zermane, Faiza Techno-Press 2021 Advances in environmental research Vol.10 No.2
Composite granules (named Fe-PILMG) based on both an Algerian montmorillonite with iron and gluten as an inert binder are prepared and used in the elimination of cadmium by dynamic adsorption in fixed bed columns. This study is essentially focused on the adsorption of Cd (II) in dynamic mode on a fixed bed based on Fe-PILMG sorbent granules followed by a study on the chemical regeneration of these new saturated adsorbents. The various regeneration tests are carried out with NaOH solution. The experimental data on the elimination of Cd (II) (pH = 7, T = 20 ± 2℃) in dynamic mode reveal that this adsorption is considerably influenced by the flow rate (2 to 5 mL min-1), Cd (II) initial concentration (20 to 50 mg L-1), and bed height (5 and 15 cm) and that a modification of each of these parameters can strongly influence the efficiency of this process. The assessment of the experimental data is carried out using the Thomas, Yoon & Nelson and Bohart-Adams models. The fit of the experimental and modeled breakthrough curves indicates excellent applicability of the mathematical models studied which is confirmed by high values of the correlation coefficient for the Bohart-Adams model (R<sup>2</sup> = 0.99, model constants N0 = 634.87 mg L-1, kBA = 0.079 (L (mg min)-1), from Yoon and Nelson model (R<sup>2</sup> = 0.97, ζ = 413.03 min, KYN = 0.0049 min-1), Thomas (R<sup>2</sup> = 0.98, q0 = 49.03 mg g-1, KTH = 5.21 mL (mg. min)-1).
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FE Simulation and Experiment of a Self-Excited SynRel Generator Based on COMSOL Software
Khelifa Hocine,Bentounsi Ammar,Rebahi Fares,Machmoum Mohamed 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.2
This paper presents the performance of a self-excited synchronous reluctance generator with fl ux barriers rotor (transversally laminated) in standalone operation mode. This type of generator’s growing interest is due to its multiple advantages (rugged structure, reliability, and low cost), which allows it to compete with conventional generators in some applications related to renewable energies. The proposed study is carried out in several steps: (i) presentation of designed low power SynRM prototype, (ii) fi nite element modeling (FEM) and simulation of self-excitation process based on COMSOL Multiphysics, (iii) analytical simulations performed with MATLAB/Simulink software based on a d-q model where the dq-inductances are identifi ed experimentally, (iv) and experimental tests performed to validate the results of the simulations.
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