نتایج جستجو برای: nrtl model

تعداد نتایج: 2104440  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...

With the increased amount of focus is being put towards reducing the emissions results from fossil fuel usually composed of hydrocarbons and impurities. The study aim at utilizing the ability of 1-octyl-3-methylimidazolium tetrafluoroborate [OMIM][BF4]. Ionic liquid as the suitable solvent for the extraction of the thiophene and its derivatives from the model gasoline. The proces...

2013
Ziyang Bai Hongfang Ma Haitao Zhang Weiyong Ying Dingye Fang

The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR mode...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1380

یکی از روش های توصیف بخار - مایع محلولهای پلیمری ، استفاده از معادلات حالت مکعبی است. بدین منظور باید از قوانین اختلاط جدید استفاده کرد . کاربرد قانون اختلاط جدید مستلزم آن است که مدلی برای تعیین انرژی گیبس مازاد محلول پلیمری انتخاب شود. در این پژوهش پیش بینی تعادل بخار - مایع محلولهای پلیمری با استفاده از معادله حالت ‏‎prsv‎‏ و قوانین اختلاط اوربی - سندلر به همراه مدل انرژی گیبس مازاد ‏‎flory-...

Journal: :Liquids 2023

Vapor–liquid equilibrium (VLE) and density data for binary systems of branched alkanes + ethyl acetate are scarce in the literature. In this study, mixtures 3-methylpentane 2,3-dimethylbutane were investigated. Density measurements at atmospheric pressure performed using a vibrating tube meter 293.15, 298.15 303.15 K. Large positive excess molar volumes calculated correlated Redlich–Kister-type...

Journal: :Fluid Phase Equilibria 2022

Several physical properties and the isobaric vapour-liquid equilibria at 101.32, 50, 30 kPa were measured for binary system consisting of acetone ionic liquid 1-ethyl-3-methyl-imidazolium acetate. Liquid-liquid equilibrium data also temperatures from 298.15 up to 328.35 K atmospheric pressure. An hourglass-shaped miscibility gap was found. The simultaneous correlation both VLE LLE regions 101.3...

Journal: :علوم و تکنولوژی پلیمر 0
علی فرهنگیان کاشانی حسین عابدینی محمدرضا کلایی

a linear low density polyethylene (lldpe) production process, including two- fuidized bed reactors in series (fbrs) and other process equipment, was completely simulated by aspen polymer plus software. fluidized bed reactors were considered as continuous stirred tank reactors (cstr consisted of polymer and gas phases). poly-srk and nrtl-rk equations of state were used to describe polymer and no...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1394

اگرکیفیت معلم کلاس برای بهبودیادگیری دانش آموزحیاتی است،پس کیفیت اساتیددانشجو-معلمان، یابه عبارتی معلمین معلمان نیزبرای پیشرفت آموزش بسیارمهم واساسی است.ناگفته پیداست که یک سیستم مناسب آموزش معلمان ،معلمین با کیفیتی را تربیت خواهدکرد.که این کار منجربه داشتن مدارس خوب، ودرنتیجه نیروی کارماهرتروشهروندبهتربرای جامعه خواهدشد. اساتیددانشجو-معلمان نقشی بسیارمهم را در سیستم اموزش معلمان درسراسرجهان ای...

Journal: :Industrial & Engineering Chemistry Research 2021

Further to Part I of our study glycol ether binary mixtures [Dimitrov, O.; Ind. Eng. Chem. Res. 2021, 60, 9602−9612], this second part is concentrated around the vapor–liquid equilibrium (VLE) modeling involving three ethers previously studied experimentally. The authors propose use NRTL-PR model for representation these nonideal mixtures. main difficulties related very low vapor pressures and ...

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