توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Modeling and Numerical Simulation of Ammonia Stripping from Industrial Wastewater Streams
اطلاعات انتشار: سومین کنفرانس ملی کاربرد CFD در صنایع شیمیایی، سال
تعداد صفحات: ۸
Ammonia removal from water was studied experimentally and theoretically by means of a hollow–fiber membrane contactor (HFMC). Aqueous solution of NH3 flowed as feed in the lumen side of membrane contactor while sulfuric acid was used as stripper in the shell side. An unsteady state and 2D mathematical model was developed to study ammonia stripping in the HFMC. The model was implemented in linked MATLAB–COMSOL Multiphysics. COMSOL software was applied to solve the model equations for the contactor while MATLAB software was employed to consider changes in the feed tank’s concentrations. Modeling predictions were then validated with the experimental data and were found to be in good agreement.<\div>

۲Simulation of CO2 Absorption in Hollow–Fiber Membrane Contactors for Wetting and Non–wetting Modes
اطلاعات انتشار: سومین کنفرانس ملی کاربرد CFD در صنایع شیمیایی، سال
تعداد صفحات: ۷
This study deals with absorption of CO2 in hollow–fiber membrane contactors (HFMCs). Simulations were performed to study CO2 transport through HFMCs. The simulations were performed via CFD techniques based on finite element method (FEM). Simulation results were validated with the experimental data for CO2 absorption using amine aqueous solutions. The simulation results were in consistent with the experimental data. Six liquid absorbents including aqueous solutions of monoethanolamine (MEA), diethanolamine (DEA), N–methyldiethanolamine (MDEA), 2–amino–2–methyl–1–propanol (AMP), sodium hydroxide (NaOH) and potassium glycinate (PG) were compared for absorption of CO2. The simulation results showed that the removal of CO2 using aqueous solution of PG was the highest among the other absorbents.<\div>

۳Dehydration study of ethylene glycol–water mixtures by mixed matrix composite membrane
اطلاعات انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۴
Separation of water–ethylene glycol (EG) mixtures is important in the industry of EG production. Dehydration of ethylene glycol (EG)–water mixtures was studied by synthesized mixed matrix composite membranes (MMCMs). Scanning electron microscopy (SEM) images showed homogeneous distribution of zeolite nanoparticles within the polymer matrix. The pervaporation (PV) experiments were carried out to study the effects of zeolite loading on separation performance of the MMCMs. From the experimantal results, it can be concluded that loading of zeolite 4A enhanced the membrane performance both in permeation flux and separation factor at optimal 5 wt.% zeolite loading.<\div>
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