Department of Chemical Engineering

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28

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32

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336

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Who works at the Department of Chemical Engineering

Department of Chemical Engineering has more than 32 academic staff members

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Dr. Munier Ahmed Ahmouda Elsherif

Publications

Some of publications in Department of Chemical Engineering

Recovery of Ethane for Petrochemical Industry in Mellitah (New Process Development)

In this work, a new process for the recovery of ethane liquid from Wafa exported gas was developed with the aim to use ethane as a feed stock for petrochemical industries at Mellitah complex. All technologies available for ethane recovery were reviewed. The turbo expander was chosen, because of its ability to recover more ethane and heavier components with less energy required than traditional liquid recovery processes. The process design was optimized using HYSYS process simulation software with Bing Robinson equation of state. The proposed flow diagram process consists of four major sections: Pretreatment section, liquefaction, cryogenic separation of methane and ethane, and recompression of the residual Wafa gas. The simulation results showed that the ethane recovery plant was able to produce over 12000 bbl/day of liquid ethane with the purity of 97 % and 3500 bbl/day of LNG mostly methane with the purity of 99.97%. The recovery of ethane using a turbo expander was 79.166%. The results showed that only 32MMSCFD of Wafa gas (from 275MMSCFD of Wafa gas) was converted to liquids with high content of ethane. The residual sale gas specifications satisfied the standard specification of the exported sale gas from Mellitah. The work also includes the design of some of the process equipment. These were: dehydration column, distillation column, separator, heat exchanger, compressor, and pump. Economic evaluation was also made based on the developed process. Total capital and operating costs were estimated. The results were found to be with DCFROR 9.14 % and a payback period of 12 years. Sensitivity analysis was also made to check the effect of the product prices and the capital costs. The results are even higher (DCFROR = 12.016%, and payback period = 9 years). The ethane recovery was tested economically as a feed stock for a petrochemical plant producing ethylene. This was the aim for the ethane recovered. The results are even better when it is used in the petrochemical industries. The DCFROR was 31.23 % and the payback period was 4 years. It is recommended that ethane should be recovered and used with the available LPG (propane and butane) at crackers in a petrochemical plant for the production of ethylene, propylene, and butadiene. This opportunity will start a development of petrochemical industries in Mellitah west of Libya
Israa Rejeibi, (11-2016)
Publisher's website

أســاسيــات هنـــدســــة التآكل

التآكل ظاهرة عامة لتلف معظم المواد سواء معدنية أو غير معدنية والتي تسبب فقدان جزء كبير من هذه المواد نتيجة لتعرضها لظروف تشغيل أو االستخدامات العملية. تقدر تكلفة هذا التلف بما يقارب 3-6 %من االنتاج القوم ي للدول الصناعية، وكذلك التي يعتمد دخلها على إنتاج وتصنيع النفط والغاز بال ضافة إلى الصناعات الكيميائية والبتروكيميائية وتحلية المياه، وتوليد الكهرباء. وال يقتصر ضرر التآكل على الصناعات بل يتعداها إلى االستخدامات المنزلية للمواد وكذلك وسائل المواصالت المختلفة. من الصعب إيقاف هذه األ ضرار بالكامل ولكن بالمكان التقليل منها عن طريق اتباع خطوات معينة بداية من التصميم الجيد واستخدام طرق المقاومة المختلفة مثل إضافة مثبطات الت آكل والحماية الكاثودية والتغليف والطالء واختيار المواد المناسبة والتحكم بظروف التشغيل والمراقبة الجيدة واالستفادة المثلى من التقدم العلمي في مجال التكنلوجيا والبرمجيات الحديثة. حاولت في هذا الكتاب المنهجي أن أوضح هذه الخطوات بطريقة مبسطة للطلبة والمهندسين العاملين في المجاالت الصناعية المختلفة. يشمل الكتاب اثني عشر فصال اعتمدت مكونات كل فصل على الخبرة التدريسية لهذا المنهج خالل السنوات الماضية، بالضافة إلى الخبرة العملية من خالل الشراف والمتابعة لظاهرة ومعالجة التآكل. يتضمن كل فصل عدد ا من األسئلة واألمثلة التي تغطى كل األجزاء، بالضافة إلى عدد من المسائل لتوضيح المعادالت المتضمنة في الكتاب.
ميلود عبدالسلام العربي العربي(1-2017)
Publisher's website

Development Study of EL-Mergheb Cement Factory Production Specification from Ordinary Portland cement to High Sulfate Resistance Cement

Abstract This study is to develop the specifications of the present cement products so as to comply with the quality and quantities requirements of the local market. The subject of this thesis is to present the results of a series of laboratory trials on a number of raw material mixtures prepared to produce moderate and high sulfate resistance cement at EL- Mergheb cement factory which currently produces ordinary Portland cement. At first, six different raw material sample mixtures were prepared from marlstone,marl and iron ore. The clinker (cement ) produced from these samples was within the moderate sulfate resistance cement ( MSRC ) specifications which mainly requires the tri calcium aluminate (C3A) to be less than 8 % by weight. The trial runs on other three raw material samples made that from mixing marlstone , clay , and iron ore produced clinker specifications that were out of those for MSRC namely, C3A is greater than 8 % . This means that the addition of clay to the raw mix prevents the production of cement with MSRC specifications. This was due to the high percentage of Al2O3 in the clay . The specifications of the clinker products based on these results , MSRC was successfully produced at the factory from raw material mixtures ( marlstone, marl and iron ore ) without any clay addition . Finally three raw mix samples were prepared from marlstone, marl, iron ore, and sand and tested in the laboratory to explore the possibility of producing high sulfate resistance cement ( HSRC) which requires C3A to be less than 5 % . The results of these laboratory trials showed that when the sand in the raw mix is kept under 1.80 % , the produced clinker specifications are within those of HSRC. The permission to carry out these trials in the factory is underway. The expected economic benefits from producing both MSRC and HSRC is highly feasible. Both types will be sold in local market without any additional operating or capital costs .
صالح محمد صالح (2013)
Publisher's website

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