Department of Chemical Engineering

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Who works at the Department of Chemical Engineering

Department of Chemical Engineering has more than 23 academic staff members

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Dr. Mawaheb Mohamed Zarok Derdar

د.مواهب محمد الزروق الدردار هي احد اعضاء هيئة التدريس بقسم الهندسة الكيميائية بكلية الهندسة. تعمل الدكتورة مواهب الدردار بجامعة طرابلس كـاستاذ مشارك منذ 15-01-2020 ولها العديد من المنشورات العلمية في مجال تخصصها


Some of publications in Department of Chemical Engineering

Experimental study of solar still performance coupled to a solar collector for potable water production

نظرا للنقص الكبير في كمية المياه الجوفية نتيجة لنقص كمية مياه الأمطار و المياه الصالحة للشرب عامة وعدم وفرة المياه في المناطق النائية وشبه القاحلة حيث تتوفر الطاقة الشمسية وتشح المياه مما يجعل للطاقة الشمسية أهمية كبيرة في تحليه المياه و التقليل من استعمال الطاقة التقليدية التي تصاحبها انبعاثات المسببة للمشاكل البيئية مثل الانحباس الحراري.الهدف من هدا البحث هو تصميم و دراسة تجريبية لأداء المحليات الشمسية نوعية الحوض(basin type solar still ) والمقطر الشمسي نوعية الفتيلة المبللة (tilted –wick solar still ) و المربوطة بالمجمعات الشمسية لغرض تسخين المياه قبل دخولها للمقطر. وقد تم استعارة نموذج رياضي مناسب لمحاكاة أداء المحليات الشمسية التي يتم دراستها ومقارنة الجانب العملي مع الجانب النظري و الذي يستفاد منه في معالجة المشاكل المتوقعة في تصميم المقطر . وقد تم مقارنة معدل إنتاجية المياه في وجود مجمع شمسي وفى عدم وجوده. حيث وجدنا أن معدل إنتاجية نوع (tilted wick) فى وجود مجمع شمسي كان 5.307lm2day عند معدل إشعاع شمسي 676.537wm2 ,وإنتاجية نوع ((basin في وجود مجمع شمسي day 3.333lm2 عند إشعاع شمسي 696.19wm2 , وإنتاجية نوع (basin) في عدم وجود مجمع شمسي day 3.025lm2 عند معدل إشعاع شمسي 721.49wm2 وقد وجدنا أن تركيز الأملاح الصلبة الدائبة كانت 3080mg/l ونقصت بعد عملية التحلية إلى 36.8mg/l و تركيز أيون الكلور كان 475mg/l و نقص إلى 2.2mg/l . حيث تعتبر الطاقة الشمسية هي من أكثر أنواع الطاقة ملائمة للاستعمال في الوقت الحالي لولا انخفاض معدل الاستفادة منها حاليا على نطاق تجارى واسع وتجرى الآن أبحاث كثيرة لتطوير وإيجاد وسائل مناسبة للحصول على الطاقة الكافية. Abstract The problem of drinking water shortage is a worldwide issue that made millions of people suffers this shortage. Different classical energy processes were used to partly solve the problem, but they were suitable only for large population areas due to their high capital, operation and maintenance cost. For these reasons, alternative methods must be sought for rural arid areas. This method uses solar energy to drive basin-type and tilted-wick-type solar stills to produce distilled water. The performance of the stills was also studied when they were connected to external solar collector to preheat the feed water to the stills. The present work deals with studying and modeling of solar stills. The basic idea of the work is to check the production of basin still and tilted wick still using solar energy for solar desalination, using brackish water with total dissolved solids (T.D.S) equal to 3080mg/l and ion chloride concentration of 475mg/l)(35) and solar energy. The still is basically a rectangular basin lined with black or blackened porous material that acts as the solar energy collector. The still was constructed from galvanized iron steel with dimensions 52×75×6 cm. the base area of 52×75 cm. The still inclined at 13o. Distilled water volume collected was recorded continuously for each hour. The productivity of tilted type still with preheated water was 5.307 L/m2 day at an average solar radiation of 676.537 w/m2. The productivity of basin type solar still with preheated water was 3.333L/m2day at an average solar radiation 696.19 w/m2. The productivity of basin type solar still without preheated water was 3.025 L/m2day at an average solar radiation 721.49w/m2. The T.D.S is 36.8mg/l, and ion chloride concentration is 2.2mg/l(35). The developed mathematical model from energy and mass balance on the system was used to predict the performance of the still. It was found that the model predicted inlet temperature and glass temperature well with that one’s measured experimentally. The productivity predicted from the model was far from that measured experimentally. This was due to the many assumption made in the development of the model.
زينب أحمد دالي (2011)
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Assessment of Cement Kiln Dust Utilization In Soil Amendment and Adsorption Process

Abstract Cement kiln dust is a major by product in cement manufacture. Methods of disposal, handling, treatment and reuses are a major factors in optimization of a certain cement plant. This thesis concentrates on the uses of cement kiln dust of souk Al Kamees cement plant as Soil amendment and as an adsorpent of Fe, Zn and lead results from sand. The major objectives of these treatments are environmental rather than economical to reduce the landfill disposal of CKD which is major problem in cement industry. CKD is used in agricultural soil amendment.CKD in Souk Alkamees consists primarily of calcium carbonate and silence dioxide, the alkaline by pass process contains highest amount of calcium oxide and lowest loss on ignation [LOI] which become a beneficial for CKD use as a soil amendment to the sand for many especial agricultural products such as potatoes, …etc. This thesis concentrates on the uses of CKD as an adsorbent to remove heavy metals such as Fe, Zn, and Pb from soil. Adsorption column is used to perform the work. Experimental setup discussed in the thesis is used using cement kiln dust as an adsorbent for removal of heavy metals from soil. The major result is to simulate the physical behavior of the process using conventional isotherms available in literature, Langmuir, Freandlish and Drachsal isotherm models have been found to simulate the data with good agreement with experimental work. Characterization of the CKD is made after dehydration process at 150C for 24 hrs. X ray fluorescent equipment is used and the results are reported in the thesis.
محمد محمود الشاهري (2015)
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Study of the Liquid-Liquid Equilibrium for the System Acetonitrile + Benzene + N-heptane

Abstract This research was an attempt to use the currently available activity coefficient methods with universal sets of parameters to simultaneously predict ternary liquid-liquid equilibrium data. The focus of this research was to calculate phase equilibrium data within fair error using set of Parameters obtained from the above-mentioned models. The significance of this work is to study the liquid-liquid phase equilibrium of the ternary system at several temperatures and to test the capability of the various equilibrium models to correlate these data. A series of liquid-liquid equilibrium measurements were performed by changing the composition of the mixture.The prepared mixtures were placed in the extraction vessel and stirred for 2 h and then left to settle for 4 h. Samples were taken by a syringe from both the upper phase and lower layers. Both phases were analyzed using gas chromatography equipped. Liquid-liquid equilibrium for the ternary system acetonitrile + benzene + n-heptane was measured at 298,313,333 K. The results were used to estimate the interaction parameters between each of the three compounds for the NRTL and UNIQUAC models as a function of temperature. The estimated interaction parameters were successfully used to predict the equilibrium compositions by the two models. The UNIQUAC equation was the most accurate model in correlating the overall equilibrium compositions of the studied system. NRTL models satisfactorily predicted the equilibrium compositions. In each of the mentioned the ternary system, the calculated and experimental data were compared. The root mean square deviation (RMSD) between the observed and calculated mole percent for NRTL, UNIQUAC was 1.44%, 1.35% for acetonitrile + benzene + n-heptane
عماد الدين محمد الزغداني (2014)
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