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Hydrodynamics in a Trickle Bed Reactor
دراسة عملیة لھایدروداینمك مفاعل الطبقة الوشلة

Authors: Muhammad Fadel Abd --- Farah Talib Jasim --- Luma Shihab Ahmed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2013 Volume: 31 Issue: 15 Part (A) Engineering Pages: 2860-2875
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Experimental investigations have been carried out to study the performance oftrickle bed reactor. The effect of key parameters that play predominate role in theperformance of trickle bed reactor was studied. A laboratory unit was constructedfor this purpose where a versatile reactor setup required " high pressure stainlesssteel reactor of 0.05m i.d × 1.25m height", in which the hydrodynamicexperiments carried out under different operating condition namely, superficial gasvelocity and liquid velocity , reactor pressure, bed temperature .Air–water systemwas used for hydrodynamic experiments pressure drop, dynamic liquid holdup, andaxial dispersion coefficients were estimated. The results also show that thedynamic liquid holdup increases with increasing liquid velocity and decreaseswith increasing superficial gas velocity and bed temperature. Axial dispersiontends to increase with increasing superficial gas and liquid velocities while itdecreases with increasing bed temperature.


Article
Removal of Phenols from Refinery Wastewater using Trickle Bed Reactor
ازالة الفينول من مياة الصرف للمصافي النفطية باستخدام مفاعل الطبقة الوشلة

Authors: Muhammad Fadel Abd --- Farah Talib Jasim --- Luma Shihab Ahmed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2013 Volume: 31 Issue: 18 Part (A) Engineering Pages: 147-160
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The present work aims to study the performance of a trickle bed reactor for phenol degradation in refinery wastewater by investigating the applicability of a commercial 0.5% platinum/alumina catalyst, which is used currently for desulfurization process in the North Refinery Company-Iraq. Synthetic wastewater experimentally was prepared to simulate the specification of samples taken from North Company Refinary. Results showed that initial phenol concentration had adverse effect on phenol removal. The results exhibited that the highest phenol conversion of (98.47%) was obtained over 0.5% Pt/γ-Al2O3 at the studied conditions (i.e., operating pressur 0.8 Mpa, operating temperature 1200C, LHSV 2.5 h-1, and air superficial velocity 0.25 m/s), with initial phenol concentration of 200 mg/L. The present method characterized by low residence time, the end-products are environmantally harmless no sludge production which requires further treatment

تضمن البحث دراسة كفاءة اداء عمود الطبقة الوشلة لازالة الفينول من مياه الصرف للمصافي النفطية بأستخدام %Pt/Al2O30.5 كعامل مساعد والمستخدم حاليا في وحدة ازالة الكبريت " desulfurization process " في مصافي الشمال. النتائج أظهرت ان اعلى نسبه تحول للفينول ((98.47 تم الحصول عليه تحت الظروف التاليه (LHSV 2.5 سا-1, درجة حرارة=120 م°, الضغط التشغيلي =0.8 ميكاباسكال والتركيز الأبتدائي للفينول=200 مغم/لتر وسرعة الغاز 0.25 m/s). وان النواتج النهائية في هذه الطريقة المستخدمة في البحث لا تحتاج الى معالجات اضافية اخرى.

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