Publications Scientifiques
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Item Application of Fourier Transform Infrared (FT-IR) Spectroscopy to the Study of the Modification of Epoxidized Sunflower Oil by Acrylation(Sage journals, 2012) Irinislimane, Ratiba; Belhaneche-Bensemra, NaimaCommercial sunflower oil was epoxidized at the laboratory-scale. The epoxidized sunflower oil (ESFO) was modified following the acrylation reaction. Modification was carried out simultaneously using acrylic acid (AA) and triethylamine (TEA). To optimize the reaction conditions, the effects of four temperatures (40, 60, 80, and 100 °C), the ESFO:AA (100:100) ratio, and 0.2% TEA were investigated. The rate of conversion was analyzed with both FT-IR and titration of the oxirane ring. After that, the temperature with the highest conversion was selected and used throughout for all modification reactions. Then, four ratios (100:100, 100:90, 100:80, and 100:75) of ESFO:AA were analyzed at four different concentrations of TEA (0.2, 0.3, 0.4, and 0.5%) to determine the best estimate for both the ESFO:AA ratio and the catalyst concentration. Conversion rate was analyzed using FT-IR spectroscopy by measuring the concentrations of ester, carbonyl, and alcohol groups. Moreover, oxirane***ring concentration was estimated using the titration method (with gentian violet as indicator) and FT-IR spectroscopy (epoxy ring absorptions at 1270 cm−1 and 877 cm−1). Based on conversion yield, the optimum ESFO:AA ratio corresponds to 100:80; the best temperature reaction was at 60 °C, and the best TEA concentration was 0.2%. The critical amounts of reactants needed to reach maximum conversion were established. The final acid value of the acrylated ESFO after washing (pH = 7) was 2.1 mg potassium hydroxide (KOH) g−1. All results show that FT-IR spectroscopy is a simple, low-cost, rapid method for investigating the kinetics of a reactionItem Entropy generation optimization of a hemispherical anchor agitated batch reactor(American Institute of Physics, 2019) Baghli, Houda; Tchouar, Noureddine; Merah, AbdelkrimThe entropy generation optimization of a hemispherical anchor agitated batch reactor has been studied, to optimize the heat transfer in the process of production of a cosmetic cream cooled by a jacket at industrial scale. The main objective of this optimization of the cooling condition was the improvement of the product quality and the reduction the energy consumption of the process. The phenomenon considered is two-dimensional, axisymmetric and permanent. The entropy generation optimization has been carried out successfully by the simulation of the heat transfer throw the reactor wall and the agitated fluid. The results give the optimum speed velocity for agitation and the optimal cooling time and coolant temperatureItem Performance analysis of stand-alone six-phase induction generator using heuristic algorithms(Elsevier, 2019) Bouhadjraa, Dyhia; Kheldoun, Aissa; Zemouche, AliThe paper exhibits the performance analysis of six-phase self-excited induction generator for stand-alone wind energy generation system. The analysis is based essentially on solving the nonlinear equivalent circuit of the SP-SEIG, which is to find the per-unit frequency F and the magnetizing reactance Xm minimizing the determinant of the nodal admittance matrix Y instead of solving two non-linear equations with two unknowns. Hence, the equation-solving problem is converted to an optimization problem. The obtained minimum yields the adequate magnetizing reactance and frequency which will be used subsequently to compute the self-excitation process requirements in terms of the prime mover speed, the excitation capacitance and the load impedance on the one hand and to predict the generator steady state performance parameters on the other. In this work, the analysis is performed using three different global search algorithms, the genetic algorithm (GA), the particle swarm optimization (PSO) technique and the Taguchi optimization method (TM). A study of some simulation results is carried out using MatLab to compare between these three algorithms in terms of accuracy and guaranteed convergence in finding the minimum of the admittanceItem Efficiency of bio- and socio-inspired optimization algorithms for axial turbomachinery design(Elsevier, 2017) Ait Chikh, Mohamed Abdessamad; Belaidi, Idir; Khelladi, Sofiane; Paris, José; Deligant, Michael; Bakir, FaridItem Optimization of the compression systems using genetic algorithm(IEEE, 2016) Zammoum Boushaki, Razika; Kessal, Farida; Bentarzi, HamidItem Feasibility study of a cosmetic cream added with aqueous extract and oil from date (Phoenix dactylifera L.) fruit seed using experimental design(Society of Cosmetic Chemists, 2015) Lecheb, Fatma; Benamara, SalemItem A penalty guided stochastic fractal search approach for system reliability optimization(Elsevier, 2016) Mellal, Mohamed Arezki; Zio, EnricoItem Fuzzy logic based gradient descent method with application to a PI-type fuzzy controller tuning : new results(IEEE, 2007) Habbi, A.; Zelmat, M.Item Improved cuckoo search algorithm for document clustering(Springer, 2015) Boushaki, Saida Ishak; Kamel, Nadjet; Bendjeghaba, OmarItem Influence of maintenance on the performance of a wind farm = Wpływ serwisowania na wydajność farm wiatrowych(2013) Benmessaoud, T.; Mohammedi, K.; Smaili, Youcef
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