توسعه مدل CFD جهت شبیه‌سازی راکتور بستر قطره‌ای (TBR) سولفور و آروماتیک‌زدا

نوع مقاله: مقاله پژوهشی

نویسندگان

آزمایشگاه تحقیقاتی CFD، گروه مهندسی شیمی دانشگاه علم و صنعت

چکیده

در این تحقیق اثر پارامترهای عملیاتی بر بازدهی راکتور بستر قطره‌ای سولفورزدایی (HDS) و آروماتیک‌زدایی (HDA) در مقیاس آزمایشگاهی توسط روش دینامیک سیالات محاسباتی (CFD) مورد بررسی قرار گرفته است. به منظور شبیه‌سازی رفتار چند فازی راکتور از دیدگاه اولری-اولری استفاده شد که در آن نیروهای بین فازی بر اساس مدل‌های ارائه شده برای محاسبه مقدار برهم‌کنش جریان‌های چند فازی در محیط متخلخل و در شرایط جریانی راکتور بستر قطره‌ای در معادله مومنتوم اعمال گردیده است. با توجه به اهمیت تابع توزیع تخلخل در رفتار هیدرودینامیک راکتور و همچنین اثر آن در پیش‌بینی بازدهی واکنش‌ها، رفتار تخلخل بستر بر اساس مدل‌های موجود برای کاتالیست‌های سه‌پر در شبیه‌سازی محاسبه شده است. پارامترهای مورد مطالعه در این تحقیق شامل بررسی دما، فشار، سرعت فاز مایع و غلظت سولفید هیدروژن فاز گاز بر میزان بازدهی راکتور با استفاده از مدل CFD می‌باشد. نتایج حاصل از شبیه‌سازی با نتایج آزمایشگاهی گزارش شده انطباق خوبی را نشان می‌دهد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Development of a CFD Model for the Simulation of HDS and HDA Reactions in TBR

نویسندگان [English]

  • Amir Heidari
  • Seyed Hassan Hashemabadi
Computational Fluid Dynamics (CFD) Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology (IUST)
چکیده [English]

In this contribution, a CFD technique has been used to study the effects of operational parameters on the amount of hydrodesulfurization (HDS) and hydrodearomatization (HDA) conversions in the trickle bed reactor (TBR). The Eulerian-Eulerian multiphase approach has been used to simulate multiphase flow conditions with appropriate models to account interphase interactions at TBR. Due to the importance of porosity distribution effect on the hydrodynamics behavior and reaction conversion, an appropriate trilobe porosity model has been implemented in the simulation models. The studied parameters are temperature, pressure, liquid phase velocity, and gas phase hydrogen sulfide concentration. The simulation results show good agreement with the reported experimental data.
 

کلیدواژه‌ها [English]

  • CFD Simulation
  • Eulerian Approach
  • TBR
  • HDS
  • and HDA
  • Porosity Function
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