Ahmed Ibrahim El - Sayed Rabie <br/><br/>
Modeling , Simulation and Optimization of an innovative hybrid cryogenic - membrane process for the production of grade (A) helium from natural gas resources /  
 النمذجة والمحاكاة والامثلية لطريقة حديثة لانتاج الهيليوم فائق النقاوة من مصادر الغاز الطبيعى بالطريقة المختلطة للاغشية والتبريد لدرجة حرارة البرودة 
Ahmed Ibrahim El - sayed Rabie ; supervised Mohamed Fahmy Moustafa Fahmy , Ahmed Soliman Mohamed Fawzy 
 - Cairo :   Ahmed Ibrahim El - Sayed Rabie ,   2006 
 - 168P :   ill , diagrs ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty Of Engineering - Department Of Chemical Engineering 
<br/><br/> Grade (A) helium can be produced from LNG off - gas stream using a hybrid - cryogenic membrane processThe scope of work of this study adopted the mathematical modeling and the simulation for the described process that developed based on the material , energy balances and mass transfer equationThe model constitutes of system of partial differential equations (PDE) and algebraic equationsThe solution of the developed model was performed by the utilization of HYSYS software together with a custom program for the solution of the PDEThe process utilizes three major units : absorption unit for the separation of the C1+components , a membrane unit to produce crude helium with at least 50 
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<br/><br/><label>Subjects--Index Terms: </label>Grade (A) helium Molding Optimization