مقاله Experiment and a New Thermodynamic Model Based on Group Co
مقاله Experiment and a New Thermodynamic Model Based on Group Contribution for Correlation LiquidدرLiquid Equilibria in Aqueous Two Phase Systems of PEG and (K2HPO4 or Na2SO4) pdf دارای 7 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است
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توجه : در صورت مشاهده بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Experiment and a New Thermodynamic Model Based on Group Contribution for Correlation LiquidدرLiquid Equilibria in Aqueous Two Phase Systems of PEG and (K2HPO4 or Na2SO4) pdf ،به هیچ وجه بهم ریختگی وجود ندارد
بخشی از متن مقاله Experiment and a New Thermodynamic Model Based on Group Contribution for Correlation LiquidدرLiquid Equilibria in Aqueous Two Phase Systems of PEG and (K2HPO4 or Na2SO4) pdf :
سال انتشار: 1382
محل انتشار: هشتمین کنگره ملی مهندسی شیمی ایران
تعداد صفحات: 7
چکیده:
A new thermodynamic model based on group contribution has been proposed for studying the phase behavior of aqueous two phase polymer-salt
systems. The assumptions of NRTL-NRF model and the activity coefficient equation of UNIQUACNRFmodel have been used for the groups. In this new model, UNIFAC-NRF, the nonrandom state of groups were selected as a refrence state . The binary interaction parameters were adjusted using the data of binary salt–water systems and the ternary systems were correlated with only six binary adjustable parameters. The Debye-Huckel equation based on Fowller-Guggenheim equation was used to calculate the long range electrostatic interaction of the ions. The UNIFAC-NRF model was applied to correlate the experimental data of aqueous two phase systems: PEG-K2HPO4–water and PEG–
Na2SO4–water for two different molecular weight of PEG at different pH. The results of the new model showed that it can be used to correlate the
LLE in aqueous solution of polymer-salt very well.
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