Browsing by Author "Nouri, L."

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    Effect of impeller type on the mixing in torus reactors
    (2008) Nasrallah, N.; Legrand, J.; Bensmaili, A.; Nouri, L.
    Torus reactors are characterized by a homogeneous fluid circulation without dead zones. Torus reactors were used for applications in biotechnology, food processing, polymerization and liquid waste treatments. The relatively simple extrapolation of performances, due to the absence of dead volume, is one of the main advantages of this reactor, with low shear stresses and an effective radial mixing allowing efficient heat dissipation. This study is based on the mixing in order to analyse the fluid circulation, mainly in turbulent flow regime, and to characterize the torus reactor with the axial dispersion plug flow model. The objective of this study is to characterize the flow and the mixing in the torus reactors in batch and continuous modes. The mixing analysis was made according to the flow parameters and to the geometrical characteristics of the reactor and impeller. The mixing in the torus reactor can be characterized by the P´eclet number, PeD, defined with torus diameter. A representative model based on plug flow with axial dispersion and partial recirculation was proposed
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    Removal in batch mode experiment of Methylene Blue onto trimming Wood of Orange Tree –Equilibrium and Kinetics Studies –
    (ALJEST, 2018) Sifoun, Naima; Abbas, Moussa; Yeddou, A. R.; Nouri, L.; Nadjemi, B.
    In the present study, adsorption of Methylene Blue (MB) from aqueous solution was investigated using an adsorbent derived from Trimming Wood of Orange Tree (WOT). The used adsorbent was analyzed using FT-IR and SEM techniques.The adsorption of MB was carried out using a batch system and the effects of adsorbent dose, initial pH, ionic strength, contact time, initial concentration and temperature on the adsorption capacity of adsorbent were investigated. Kinetic parameters, rate constants, equilibrium adsorption capacities and determination coefficients, for each kinetic equation were calculated and discussed. It was shown that the adsorption of MB onto WOT could be described by the pseudo-second order kinetic. The experimental isotherm data were analyzed using the Langmuir, Freundlich and Temkin models. Adsorption of MB onto WOT followed the Langmuir isotherm for all temperatures studied and the maximum MB uptake was observed as 48.78 mg/g at 293 K. The evaluation of thermodynamics parameters such as the negative Gibbsfree energy and negative enthalpy change indicated respectively the spontaneous and exothermic nature of thesorptionprocess
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    Stochastic models for artificial cement control parameters
    (Building and Housing Research Center (BHRC), 2015) Nouri, L.; Yousfi, S.; Saidani, M.; Hadjab, H.; Nouri, M.
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    The use of the dreux-gorisse method in the preparation of concrete mixes : an automatic approach
    (Building and Housing Research Center, 2014) Yousfi, S.; Nouri, L.; Saidani, M.; Hadjab, H.