Génie des Procédés

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Synthèse et caractérisation du CuO les effet de concentration : Influence de la concentration sur la composition chimique, la morphologie, les propriétés électriques ,optoélectroniques
(2025) Elmiliani, Hanane; Maarouf, Sarra; HAMAIDA, Khaira
In this work, we studied the synthesis and characterization of copper oxide (CuO) thin films prepared using the spray pyrolysis technique. The main objective was to investigate the influence of precursor solution concentration on the structural, morphological, optical, and electrical properties of the deposited films. CuO, as a p-type semiconductor, exhibits promising characteristics for various applications in optoelectronics, energy conversion, and catalysis. Spray pyrolysis proved to be a simple, cost-effective, and efficient method for producing homogeneous thin films. Several characterization techniques were employed, including X-ray diffraction (XRD), atomic force microscopy (AFM), photoluminescence spectroscopy (PL), Fourier-transform infrared spectroscopy (FTIR), as well as electrical measurements using the four-point probe method and Hall effect. The results showed that varying the precursor concentration significantly affects the crystallinity, surface roughness, electrical conductivity, and optical absorption of the films. This study highlights the potential of CuO as a functional material for optoelectronic devices and emphasizes the importance of optimizing deposition conditions to achieve enhanced performance. It also opens up further research opportunities into CuO doping and its integration into more complex structures.
Aperçu sur le génie des procédés des matériaux
(2025) TEMMOUN, Sid Ahmed; TOUMI, Ibrahim El Khalil; BENSAAD, Bourassia
This Master's thesis in Materials Process Engineering presents an in-depth study of materials science, focusing on their definition, classification, and fundamental properties. It distinguishes five major families of materials: metals, polymers, ceramics, composites, and semiconductors, detailing their mechanical, thermal, electrical, optical, and chemical characteristics. The analysis of micro and macrostructure, as well as phase diagrams, helps to understand the influence of internal organization on their performance. The thesis also highlights the importance of manufacturing processes, particularly welding, and their impact on the mechanical properties of iv materials. A welding simulation is carried out to evaluate its effects on the strength and deformation of welded materials. This comprehensive approach aims to optimize the selection and implementation of materials to meet the increasing demands of modern industry, thus ensuring innovation and quality in various technological sectors.
Study of Hydrocarbon Adsorption from Industrial Effluents Using Mesoporous Materials
(2025) SI ALI, Rihab; RAHMOUN, Imane; Dr. CHOUAT Nadjat
This work focuses on the study of hydrocarbon adsorption from industrial effluents using mesoporous materials, particularly MCM-41 and its modified forms. These pollutants, which are often difficult to remove using conventional methods, pose a serious environmental threat. The study covers both the theoretical aspects of adsorption and its experimental applications, including the synthesis, characterization of materials, and adsorption tests. The results show that modified materials significantly improve hydrocarbon removal efficiency, especially at neutral pH. These findings highlight the potential of mesoporous materials in industrial wastewater treatment and open the door to further research on optimizing adsorption conditions, developing new adsorbents, and integrating these materials into large-scale industrial systems.
Production de l’hydrogène par électrolyse de l’eau
(2025) MOHAMMEDKRACHAI, Hanane; BENTOUIR, Narimen Fatima Zahra; Dr.REMLAOUI Ahmed
The Hydrogen is an energy carrier that is not directly available in nature, so it must be manufactured before it is stored and used. It is essentially obtained by reforming or gasification of hydrocarbons and electrolysis of water. The main objective of this work is to study the electrolysis of water and the production of hydrogen. Consequently, the experimental study gave good results. However, water alone gives very few hydrogen values in the electrolysis of water. The hydrogen could be considered as the fuel of the future.
PRODUCTION OF HYDROGEN
(2025) MIZHA Martin, Farai; Mr. NEHARI Driss
This study provides a systematic evaluation of hydrogen production methods, with focus on optimizing solar-powered alkaline electrolysis for sustainable energy systems. While analyzing conventional pathways (steam reforming, pyrolysis) and emerging alternatives (PEM/SOEC electrolysis), the research identifies alkaline electrolyzers as the most viable technology for large- scale solar hydrogen in high-irradiation regions like Algeria. Through MATLAB simulations validated by PVGIS data, we demonstrate how 80°C operation improves electrolyte conductivity (115.5 S/m) while managing overpotentials (total cell voltage: 2.24 V). Practical implementation challenges are addressed through: (1) sensitivity analysis of Faradaic/PV efficiencies, (2) comparative assessment of storage/transport methods, and (3) levelized cost modeling (€4.50/kg at optimized conditions). The work bridges theoretical principles with deployable solutions, offering actionable insights for renewable hydrogen projects in sun-rich developing economies.
Etude sur la production de marbre, granit et quartz artificiel
(2025) BOUROUIS, BOCHRA; CHADLI, DORIA; Dr M.MERABTENE
This Research focuses on the study of the production of artificial marble, granite, and quartz surfaces within the company SARL SOFCONTRA. It aims to understand the manufacturing processes, the raw materials used, and the factors influencing the quality of the final products. Special attention is given to the Breton Terastone system, which is widely used for the production of quartz-based composite surfaces. The study also includes physicochemical analysis of raw materials and final products using techniques such as Fourier-transform infrared spectroscopy (FTIR). The findings help better characterize the materials and provide recommendations to improve industrial performance and the quality of locally manufactured products.
Établissement de nettoyage, de désinfection et d'extermination d'insectes
(2025) Benbabouche, Hadjer; DR.NEHARI DRISS
Our work revolves around establishing an institution that provides cleaning, disinfection and insect extermination services. The “Dariclean” Foundation is considered an institution with a unique service nature, as this type of institution is considered to be rarely widespread in Algeria, as most of the institutions that provide similar services are located in the capital or major cities, and they are small and unknown institutions that provide limited services and in traditional ways. The first goal of the “Dariclean” Foundation is to promote the culture of reliance on cleaning companies. We also adopt the latest technologies and use modern technology. We have developed an electronic application that allows the customer to learn about our services, their quality, and the prices of each service through this application, and he can also choose the service he wants through This application without the hassle of moving to the institution’s headquarters. Our employees ensure that customers' needs are met and services are provided with the highest quality without any defects to provide more comfort and satisfaction to customers. We provide different and diverse services that are widely requested and accepted by the community.
Gestion des déviations dans l’analyse de la composition du GNL par chromatographie en phase gazeuse selon la norme ASTM D1945 : Application d’une carte de contrôle pour l’assurance qualité
(2025) ARMAS, Mérieme; Dr. CHOUAT Nadjat
This thesis focuses on the quality control of liquefied natural gas (LNG) composition analysis carried out at the GL3/Z complex of Sonatrach in Bethioua. The study specifically addresses the management of analytical deviations in the gas composition analysis using gas chromatography, according to the ASTM D1945 standard. The main objective is to implement a statistical process control approach. A reference gas was injected 30 times to establish baseline averages and standard deviations for each component. These values were then used to analyze 24 weekly injections, aimed at detecting any significant drift in the analytical system. The results showed good stability and repeatability, with measured concentrations remaining within acceptable limits. This work contributes to strengthening metrological control and supports a broader quality assurance strategy aligned with ISO/IEC 17025 requirements.
Study of Hydrocarbon Adsorption from Industrial Effluents Using Mesoporous Materials
(2025) SI ALI, Rihab; RAHMOUN, Imane; CHOUAT, Nadjat
This work focuses on the study of hydrocarbon adsorption from industrial effluents using mesoporous materials, particularly MCM-41 and its modified forms. These pollutants, which are often difficult to remove using conventional methods, pose a serious environmental threat. The study covers both the theoretical aspects of adsorption and its experimental applications, including the synthesis, characterization of materials, and adsorption tests. The results show that modified materials significantly improve hydrocarbon removal efficiency, especially at neutral pH. These findings highlight the potential of mesoporous materials in industrial wastewater treatment and open the door to further research on optimizing adsorption conditions, developing new adsorbents, and integrating these materials into large-scale industrial systems.
Investigation of Factors Influencing NOx Emissions in Gas Turbine Generators of a Natural Gas Liquefaction Facility
(2025) ELMEZOUAR, Abdel Rafik; ABDALLAH BERRABEH, Ben ali; CHOUAT, Nadjat
This thesis presents an experimental investigation into the factors influencing nitrogen oxide (NOx) emissions from Frame 6 gas turbines equipped with Dry Low NOx (DLN) systems within a natural gas liquefaction complex. These pollutants represent a major challenge for the energy industry, as their emissions can exceed regulatory limits even with advanced control technologies in place. The study combines a theoretical review of NOx formation mechanisms with a rigorous experimental campaign, utilizing in-situ gas analysis, fuel gas chromatography, and real-time operational data collection. The results demonstrate that fuel gas density and composition, particularly the levels of nitrogen and ethane, have a more decisive influence on NOx production than the fuel's overall calorific value. These findings underscore the need for a systemic, multi-parameter approach to emissions control and open pathways for developing advanced predictive models to optimize the environmental performance of industrial gas turbines.
Elimination d’un polluant organique à partir des déchets industriels
(2025) GUEZOUL, Meriem; SEGHIR, Amina; TABTI, Affaf
This study evaluates the efficiency of activated carbons derived from potato peels (CAEPT) and sweet potato peels (CAEPD) for the removal of two dyes: indigotine (CI), a food-grade dye, and acid violet 43 (AV), commonly found in cosmetic products. Dye concentrations were quantified using UV-Vis spectrophotometry, and the adsorption mechanisms were investigated through kinetic studies and thermodynamic isotherm models. The results demonstrated excellent dye removal performance. For an adsorbent mass of 100 mg, removal efficiencies reached 91.5% for CI and 99.52% for AV using CAEPT, and 84.14% for CI and 99.94% for AV using CAEPD. Adsorption data obtained with adsorbent masses of 50, 75, and 100 mg fit well with the Temkin isotherm model, indicating a favorable adsorption process. Additionally, the adsorption kinetics followed a pseudo-second-order model, suggesting that chemisorption is the rate-limiting step of the process.
Synthèse verte des nano-composites Sépiolite/ Palladium. Application à la dégradation du Bleu de méthylène
(2025) Driza, Merouane; Brahim, Aya; BOUSSALAM, Smail
In this thesis, sepiolite/palladium (Pd) nanocomposites were prepared using a green chemistry approach. In the first part, the nanoparticles (Pd) were synthesized in the presence of sepiolite in aqueous solution using a medicinal plant extract (henna). In the second part, the nanocomposites thus prepared were used as catalytic support for the purification of water loaded with cationic dye (methylene blue). The influence of different parameters such as mass, concentration, and intensity were studied. The experiment using Pd/Sep (3 mg, 10–5 mol/l, 120 min, 75 W lamp) clearly stands out for its high efficiency with the minimum amount of photocatalyst, thus demonstrating remarkable catalytic performance.
Elimination d’un polluant organique à partir des déchets industriels
(2025) GUEZOUL, Meriem; SEGHIR, Amina; TABTI, Affaf
This study evaluates the efficiency of activated carbons derived from potato peels (CAEPT) and sweet potato peels (CAEPD) for the removal of two dyes: indigotine (CI), a food-grade dye, and acid violet 43 (AV), commonly found in cosmetic products. Dye concentrations were quantified using UV-Vis spectrophotometry, and the adsorption mechanisms were investigated through kinetic studies and thermodynamic isotherm models. The results demonstrated excellent dye removal performance. For an adsorbent mass of 100 mg, removal efficiencies reached 91.5% for CI and 99.52% for AV using CAEPT, and 84.14% for CI and 99.94% for AV using CAEPD. Adsorption data obtained with adsorbent masses of 50, 75, and 100 mg fit well with the Temkin isotherm model, indicating a favorable adsorption process. Additionally, the adsorption kinetics followed a pseudo-second-order model, suggesting that chemisorption is the rate-limiting step of the process.
Elimination d’un médicament par un biosorbant naturel
(2025) BOUDJEMA, Kheira; FEKIH, Infel; TABTI, Affaf
The main objective of this work is to study the removal of two types of pollutants originating from commonly used pharmaceutical products: ferric iron, found in Seloferfol tablets, and the azo dye azorubine (E122), present in Salbutamol Saidal syrup. To achieve this, activated carbons were prepared from orange and lemon peels and used as natural adsorbents. The efficiency of these biomaterials was assessed through a series of experiments by varying several operational parameters such as pH, contact time, and adsorbent mass. The adsorption mechanisms were investigated by applying two kinetic models: pseudo-first-order and pseudo-second-order. The latter proved to be the most suitable for describing the experimental data, suggesting that the adsorption process is primarily governed by chemical interactions. Furthermore, the Langmuir, Freundlich, and Temkin isotherms were employed to model the adsorption equilibrium. The results demonstrated very high removal rates: up to 99.304% for ferric iron using lemon peel- based activated carbon, and 97.631% using orange peel-based carbon. As for azorubine, the removal efficiencies reached 94.25% with orange peel carbon and 93.388% with lemon peel carbon. These findings highlight the excellent adsorption capacity of both biomaterials, with a slight advantage for lemon peel carbon in the case of ferric iron, and orange peel carbon for azorubine.
Évaluation des propriétés inhibitrices d’un sirop à base des extraits de plantes contre la corrosion
(2025) Bensiyakoub, Riheb; Bessayah, Manel; BENHADRIA, Naceur
This study aims to evaluate the inhibitory efficiency of a pharmaceutical product derived from medicinal plant extracts against copper corrosion in an acidic environment, using the gravimetric method. Several experimental parameters were investigated, including inhibitor concentration, solution temperature, and immersion time. The experimental results showed that the maximum inhibition efficiency, reaching 83%, was achieved at a concentration of 0.4% v/v, at 323 K, after one hour of exposure. The efficiency increased with both the inhibitor concentration and temperature, while prolonged immersion negatively affected its protective performance. The adsorption behavior of the inhibitor on the copper surface followed the Langmuir isotherm model, indicating monolayer adsorption. Theb calculated thermodynamic parameters revealed that the adsorption process is endothermic and occurs spontaneously. Moreover, the activation energy in the inhibited solutions was lower than in the uninhibited one, suggesting a modification in the corrosion mechanism. Negative values of activation entropy indicated that the transition state is more ordered than the initial reactants. These findings confirm that the studied syrup offers an effective and environmentally friendly alternative for mitigating copper corrosion in acidic media.
Étude de performance de la régénération du dernier cycle du catalyseur au niveau de raffinage d'Arzew
(2025) KARKABOU, AYA; MAHI, ZOHRA; BAILICHE, ZOHRA
Catalytic reforming is a chemical process used to convert a portion of petroleum, known as "heavy naphtha", into high-quality gasoline. During this process, the catalyst gradually loses its activity due to the buildup of coke, which is a carbon deposit. Over time, this accumulation leads to the deactivation of the catalyst. To prevent this deactivation, a regeneration process is carried out to remove the carbon deposits and restore the catalyst's original activity and performance. In this study, we evaluated the performance of the catalytic reforming unit at the Arzew refinery, specifically comparing the reforming section's efficiency before and after regeneration, and assessing the feasibility of regeneration to enhance gasoline quality, particularly by improving the octane number. The studied catalyst is of the UOP R-86 type, a high-performance catalyst for catalytic reforming.
Évaluation de l'impact des rejets de station d'épuration de la région De Bouzedjar d'Ain Temouchent sur la qualité des eaux de surface : étude physico-chimique et microbiologique.
(2025) ACHIR, Hadjar; MANSOUR, Meriem
This work focuses on evaluating the performance of the Bouzedjar wastewater treatment plant, located in the Aïn Témouchent province in Algeria. Operated by the National Sanitation Office (ONA), this station treats domestic wastewater using a biological process based on activated sludge, before discharging the treated water into the natural environment. The main objective of this work is to compare the physico-chemical and organoleptic characteristics of the water at the inlet and outlet of the plant in order to assess the effectiveness of the treatment. For this purpose, sampling was carried out in February 2025, followed by laboratory analyses of the collected samples. The parameters studied include pH, electrical conductivity, turbidity, COD, DBO5, dissolved oxygen, suspended solids (SS), nutrients (total nitrogen, nitrates, nitrites, phosphate), and sedimentation volume (V30). The results showed a clear improvement in water quality after treatment, particularly through the disappearance of unpleasant odors and the transparency of the water. The organic load was significantly reduced, with BOD5 dropping from 80 to 10 mg/l and DCO from 192 to 36 mg/l. Dissolved oxygen increased from 2 to 6 mg/l, and suspended solids decreased from 86 to 10 mg/l. Nutrients were partially removed, reducing the risk of eutrophication. However, the electrical conductivity remained high after treatment (1500 μS/cm), indicating the persistence of dissolved salts, which limits the potential for reuse without tertiary treatment. In conclusion, while the station shows good performance in primary and secondary treatment, improvements are still needed to reduce the concentration of dissolved salts, especially if the treated water is to be reused in agriculture or sensitive environments.
Contribution à la valorisation des matières plastiques issus des déchets des pneus
(2023) BOUAKLINE, Farah; BOUAKLINE, Ghizlene; NEHARI, Driss
L’objectif principal de cette étude consiste à examiner les potentialités de l’incorporation des granulats de caoutchouc recyclés (GCR) des pneus usagés dans une matrice cimentaire. Le matériau étudié est un mortier dans lequel le sable a été substitué par ces granulats de caoutchouc à des teneurs massiques de 0, 10, 20 et 30%. Des séries de tests ont été conçues est réalisées, en l’occurrence des tests de résistance à la compression, de résistance à la flexion, d’auscultation dynamique et de conductivité thermique. Les résultats expérimentaux ont montré que l’incorporation des granulats de caoutchouc recyclés diminuent les propriétés mécaniques des mélanges étudiés. Néanmoins, les autres propriétés comme la conductivité thermique et la vitesse de propagation des ondes ultrasonores des mortiers de caoutchouc sont fortement améliorées par rapport au mortier témoin. Ces propriétés innovantes des granulats de caoutchouc recyclés non seulement peuvent améliorer le confort des bâtiments, mais aussi constitue une nouvelle voie de valorisation des pneumatiques usagés.
Synthèse et caractérisation du biodiesel à partir des matériaux argileux
(2023) YEBBAL, Meriem; MOUSSI, Asma; Bachir, Cherifa
Cette étude rendre dans le cadre de la production du biodiesel, synthétisé par transestérification de l´huile d’olive algérienne, en présence de catalyseur homogène (acide) et hétérogène (argile illite). Dans ce contexte, nous avons mis en oeuvre l’application de plusieurs techniques à savoir : la spectroscopie IRTF et la DRX, faisant appel aux caractérisations physicochimiques des biodiesels formés. L´argile utilisée présente majoritairement le minéral illitique associée à des impuretés tel que le quartz. Les résultats de la spectroscopie IRTF des esters ont prouvés que les deux biodiesels sont identiques et présentent les mêmes groupements structuraux. Les propriétés physicochimiques des deux biodiesels, quant à eux, se situent bien dans les normes internationales. En outre, le rendement du biodiesel synthétisé par l’argile est supérieur à celui synthétisé par l’acide. Enfin, l’utilisation des argiles comme des catalyseurs hétérogènes pour la synthèse du biodiesel est beaucoup meilleure que les acides, étant donné leur abondance naturelle dans le sol algérien.
Synthèse et caractérisation des couches minces de Sulfure d’étain dopées : Application au Traitement des eaux.
(2023) REFSA, Malika Chaima; SETTOUT, Nihed; Nebatti ech-chergui, Abdelkader
Nous présentons la synthèse et la caractérisation approfondie de films minces de SnS2 dopés à des concentrations différentes de cuivre (2% et 4%). Ces films ont été préparés à l’aide d’une méthode de spray-pyrolyse avec une encre moléculaire transparente, spécifiquement pour l’application de la photodégradation. Nous avons examiné les effets du dopage au cuivre sur les propriétés structurales, chimiques et morphologiques des films minces en utilisant diverses techniques appropriées. Nos résultats indiquent que les films purs de SnS2 ont été cultivés avec succès dans la phase SnS2, avec une préférence pour les plans cristallins (101). La présence des éléments Sn, S et Cu détectée dans l’analyse par dispersion d’énergie des rayons X confirme la formation de SnS2 et l’incorporation du dopage au cuivre. De plus, l’analyse par spectroscopie infrarouge vérifie l’existence de liaisons Sn-S dans les films minces de SnS2 dopés au cuivre. De plus, nous avons effectué des mesures de la bande interdite sur les films de SnS2 non dopés et dopés, qui se situaient entre 2 et 2,22 eV. Ces résultats suggèrent que ces films ont un potentiel d’activité photocatalytique efficace. De manière significative, parmi les films synthétisés, le film de SnS2 dopé au cuivre avec une concentration de 4% a présenté le taux de dégradation le plus élevé pour la colorante verte malachite sous lumière visible. Les taux de dégradation ont été déterminés à 58,2%, 60,27% et 62,92% respectivement pour le film pur de SnS2, le film de SnS2 dopé au cuivre à 2% et le film de SnS2 dopé au cuivre à 4%.

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