f7dc9c6ab1f8c7a 8fcd9532671845f 8fcd9532671845f

شبیه‌سازی CFD حذف دی‌اکسید‌کربن از مخلوط گازی توسط تماس‌دهنده غشایی فیبر توخالی پلی‌وینیلیدین‌فلوراید

نوع مقاله: مقاله پژوهشی


گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه یاسوج، ایران


در این پژوهش با استفاده از تکنیک دینامیک سیالات محاسباتی، مدل دو بعدی حذف دی‌اکسید‌کربن (CO2) با یک تماس‌دهنده غشایی فیبر توخالی از جنس پلی‌وینیلیدین‌فلورید مورد بررسی قرار گرفت. در این مدل انتشار محوری و شعاعی لحاظ شده است. همین‌طور جریان همرفت در پوسته و لوله در نظر گرفته شده است. معادلات پیوستگی، مومنتوم و جرم به روش المان محدود حل شده است. نتایج این مدل تطابق خوبی را با داده‌های آزمایشگاهی حذف دی‌اکسیدکربن از مخلوط گاز توسط آب را دارد. در سرعت m/s 5 مایع جاذب درصد حذف دی‌اکسیدکربن در دمای ثابت 10 و C° 40 به‌ترتیب 36/55 و 25/46 % می‌باشد. در سرعت m/s 02/0 مخلوط گازی و سرعت m/s 5 مایع جاذب درصد حذف دی‌اکسیدکربن درجریان ناهمسو و همسو به‌ترتیب 43/51 و 34/23 % می‌باشد. با افزایش سرعت مایع راندمان حذف افزایش می‌یابد. با افزایش سرعت مخلوط گاز راندمان حذف کاهش می‌یابد. همچنین نشان داده شد که این روش قادر به پیش‌بینی عملکرد تماس‌دهنده غشایی فیبر توخالی برای جذب دی‌اکسید‌کربن از مخلوط‌های گازی است.


عنوان مقاله [English]

CFD Simulation of CO2 Removal from Gas Mixtures in Hollow Fiber Membrane Contactors PVDF

نویسندگان [English]

  • mohammad sabzehmeidani
  • Asgar Lashani
  • Hossein Moeini
Chemical Engineering Department, Faculty of Engineering, Yasouj University, Yasouj, Iran
چکیده [English]

In this study, a 2D numerical model is investigated for removal of CO2 in a hydrophobic polyvinylidene fluoride (PVDF) hollow fiber membrane contactor (HFMC) using the computational fluid dynamics (CFD) method.  The model considers axial and radial diffusion in the membrane contactor. It also considers convection in the tube and shell side. The model governing equations were solved with using finite-element method. Simulation predictions were validated with the experimental data obtained from literature for CO2 absorption from the gas mixture by water. The simulation predictions were in good agreement. The results of this model are in good agreement with experimental data CO2 removal from the gas mixture by water. In velocity 5 m/s absorbent fluid removal efficiency carbon dioxide at a constant temperature of 10 and 40 °C, respectively, 55.36 and 46.25 %. In velocity of 5 m/s absorbent fluid and 0.2 m/s gas mixture removal efficiency of carbon dioxide absorbent 51.43 and 23.34 % respectively during counter current and co-current flow. Increasing liquid velocity led to an increase in removal efficiency of carbon dioxide. By increasing the gas mixture velocity, removal efficiency is reduced. It is shown that this method is able to predict the performance of the membrane contactor hollow fiber to absorb CO2 from the gas mixture.

کلیدواژه‌ها [English]

  • Computational Fluid Dynamics (CFD)
  • Contacts the Membrane
  • Earbon Dioxide
  • PVDF
  • Hollow Fiber Membrane
[1]. UNEP, “No Title United Nations Environment Programme, Introduction to Climate Change,” 2005.##

[2]. Freund P. “Making deep reductions in CO2 emissions from coal-fired power plant using capture and storage of CO2”, Proc. Inst. Mech. Eng. Part A J. Power Energy , Vol. 217 , No. 1 , pp. 1–7, Feb. 2003.##

[3]. IPCC, “Intergovernmental panel on climate change (IPCC) special report on carbon dioxide dapture and storage”, Cambridge Univ. Press. Cambridge, UK., 2005.##

[4]. Davidson R. M., “Post-combustion carbon capture from coal fired plants – solvent scrubbing”, IEA Clean Coal Cent., 2007.##

[5]. Favre E., “Carbon dioxide recovery from post-combustion processes: Can gas permeation membranes compete with absorption?”, J. Memb. Sci., Vol. 294, No. 1–2, pp. 50–59, May 2007.##

[6]. Shrikar Chakravarti and Amitabh Gupta, B. H., “Advanced Technology for the Capture of Carbon Dioxide from Flue Gases, First Natl. Conf. Carbon Sequestration.##

[7]. Drioli E., Curcio E. and di Profio G., “State of the art and recent progresses in membrane contactors”, Chem. Eng. Res. Des., Vol. 83, No. 3, pp. 223–233, Mar. 2005.##

[8]. Picard C., Larbot A., Tronel-Peyroz E. and Berjoan R., “Characterisation of hydrophilic ceramic membranes modified by fluoroalkylsilanes into hydrophobic membranes”, Solid State Sci., Vol. 6, No. 6, pp. 605–612, Jun. 2004.##

[9]. Brodard F., Romero J., Belleville M. P., Sanchez J., Combe-James C., Dornier M. and Rios,G. M., “New hydrophobic membranes for osmotic evaporation process”, Sep. Purif. Technol., Vol. 32, No. 1–3, pp. 3–7, Jul. 2003.##

[10]. Qi Z. and Cussler E. L., “Microporous hollow fibers for gas absorption. I. Mass transfer in the liquid”, J. Memb. Sci., Vol. 23, Issue 3. pp. 321–332, May 1985.##

[11]. El-Naas M. H., Al-Marzouqi M., Marzouk S. A. and Abdullatif N., “Evaluation of the removal of CO2 using membrane contactors: Membrane wettability”, J. Memb. Sci., Vol. 350, No. 1–2, pp. 410–416, Mar. 2010.##

[12]. Falk-Pedersen O. and Dannström H., “Separation of carbon dioxide from offshore gas turbine exhaust”, Energy Convers. Manag., Vol. 38, Supple, pp. S81–S86, 1997.##

[13]. Yan S., Fang M. X., Zhang W. F., Wang S. Y., Xu, Z. K., Luo Z. Y. and Cen K.F., “Experimental study on the separation of CO2 from flue gas using hollow fiber membrane contactors without wetting”, Fuel Process. Technol., Vol. 88, No. 5, pp. 501–511, May 2007.##

[14]. Hoff K. A., Juliussen O., Falk-Pedersen O. and Svendsen H. F., “Modeling and experimental study of carbon dioxide absorption in aqueous alkanolamine solutions using a membrane contactor”, Ind. Eng. Chem. Res., Vol. 43, No. 16, pp. 4908–4921, Aug. 2004.##

[15]. Dindore V. Y., Brilman D. W. F. and Versteeg G. F., “Modelling of cross-flow membrane contactors: Mass transfer with chemical reactions”, J. Memb. Sci., Vol. 255, No. 1–2, pp. 275–289, Jun. 2005.##

[16]. Keshavarz P., Fathikalajahi J. and Ayatollahi S., “Analysis of CO2 separation and simulation of a partially wetted hollow fiber membrane contactor, J. Hazard. Mater., Vol. 152, No. 3, pp. 1237–1247, Apr. 2008.##

[17]. Vogt M., Goldschmidt R., Bathen D., Epp B. and Fahlenkamp H., “Comparison of membrane contactor and structured packings for {CO2} absorption”, Energy Procedia, Vol. 4, pp. 1471–1477, 2011.##

[18]. Sohrabi M. R., Marjani A., Moradi S., Davallo M. and Shirazian S., “Mathematical modeling and numerical simulation of {CO2} transport through hollow-fiber membranes”, Appl. Math. Model., Vol. 35, No. 1, pp. 174–188, 2011.##

[19]. Ahmad F., Lau K. K., Lock S. S. M., Rafiq S., Khan A. U. and Lee M., “Hollow fiber membrane model for gas separation: Process simulation, experimental validation and module characteristics study,” J. Ind. Eng. Chem., Vol. 21, pp. 1246–1257, 2015.##

[20]. Lock S. S. M., Lau K. K., Ahmad F. and Shariff A. M., “Modeling, simulation and economic analysis of {CO2} capture from natural gas using cocurrent, countercurrent and radial crossflow hollow fiber membrane,” Int. J. Greenh. Gas Control, Vol. 36, pp. 114–134, 2015.##

[21]. Bird R. B., Stewart W. E. and Lightfoot E. N., Transport Phenomena. Wiley, 2007.##

[22]. Happel J., “Viscous flow relative to arrays of cylinders”, AIChE J., Vol. 5, No. 2, pp. 174–177, 1959.##

[23]. Zhang Z., Yan Y., Zhang L. and Ju S., “Numerical simulation and analysis of CO2 removal in a polypropylene hollow fiber membrane contactor,” Int. J. Chem. Eng., Vol. 2014, 2014.##

[24]. Keshavarz P., Fathikalajahi J. and Ayatollahi S., “Mathematical modeling of the simultaneous absorption of carbon dioxide and hydrogen sulfide in a hollow fiber membrane contactor,” Sep. Purif. Technol., Vol. 63, No. 1, pp. 145–155, 2008.##

[25]. Versteeg G. F. and Van Swaalj W., “Solubility and diffusivity of acid gases (carbon dioxide, nitrous oxide) in aqueous alkanolamine solutions,” J. Chem. Eng. Data, Vol. 33, No. 1, pp. 29–34, 1988.##

[26]. Mansourizadeh A., “Experimental study of CO2 absorption/stripping via PVDF hollow fiber membrane contactor”, Chem. Eng. Res. Des., Vol. 90, No. 4, pp. 555–562, 2012.##

[27]. Bird R. B., “Transport phenomena, Appl. Mech. Rev., Vol. 55, No. 1, pp. R1–R4, 2002.##

[28]. Yunfei Yan Zh. Zh., Zhang L. and S. J., “Numerical simulation and analysis of CO2 removal in a polypropylene hollow fiber membrane contactor”, Int. J. Chem. Eng., Vol. 2014, p. 7, 2014.##