مهندسی گاز ایران

اثر تعادل بخار-مایع بر جذب گاز CO2 توسط محلول آبی پپرازین و مایع یونی به روش طراحی آزمایش مرکب مرکزی

نوع مقاله : مقاله ترویجی

نویسندگان

1 دانشجوی دکترای، گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه یاسوج، یاسوج، ایران

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

چکیده

در این پژوهش، جذب گاز CO2 توسط محلول آبی پپرازین و مایع یونی به روش سطح پاسخ (RSM) بر اساس طراحی مرکب مرکزی (CCD) به‌منظور طراحی آزمایش‌ها، ساخت مدل‌ها و یافتن شرایط عملیاتی بهینه برای دستیابی به پاسخ‌های مطلوب در محدوده دما، فشار و زمان مورد بررسی قرار گرفت. طراحی و بهینه‌سازی این گروه از واحدهای جداسازی، مستلزم داشتن داده‌های دقیق تعادلی و ترمودینامیکی بخار-مایع می‌باشد. در این تحقیق، شرایط بهینه‌ی بارگیری گاز CO2 با استفاده از روش طراحی مرکب مرکزی تعیین گردید. تجزیه‌وتحلیل معادلات، مطابق رگرسیون چندجمله‌ای درجه دوم و تحلیل واریانس ANOVA انجام شد. مطابق نتایج به‌دست‌آمده، افزایش فشار و زمان و کاهش دما، منجر به افزایش میزان حلالیت گاز دی‌اکسید کربن در مخلوط آمینی گردید. شرایط بهینه‌ی جذب نیز در فشار bar ۶/۱، دمای ℃ ۲۱ و زمان ۱/۵ ساعت به‌دست آمد. در انتها، مکانیزم تأثیر دما بر میزان حلالیت با اصل لوشاتلیه، تأثیر فشار بر حلالیت با قانون هنری و تأثیر زمان بر حلالیت با بررسی سینتیکی واکنش جذب تعیین گردید.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Vapor-Liquid Equilibrium on CO2 Gas Absorption by Amine Peprasine- Ionic liquid Solution Using Central Composite Test Design Method

نویسندگان [English]

  • Soheila Zare 1
  • Abdolrasoul Pouranfard 2

1 PhD Student, Department of Chemical Engineering, Engineering Faculty, Yasuj University, Yasouj, Iran

2 Assistant Professor, Department of Chemical Engineering, Engineering Faculty, Yasouj University, Yasouj, Iran

چکیده [English]

In this research, the absorption of CO2 by an aqueous solution of Amine Piperazine-Ionic liquid was investigated. The Response Surface Method (RSM) based on Central Composite Design (CCD) was used to design experiments, build models, and find optimal operating conditions to achieve optimal responses in the range of used temperature, pressure, and time. The design and optimization of this group of separation units requires to accurate equilibrium and thermodynamic data of vapor-liquid equilibrium. In this study, the optimal loading conditions of CO2 gas were determined using the central composite design (CMD) method. Analysis of the equations performed using quadratic polynomial regression and ANOVA analysis of variance. Enhancement of the pressure and time and reducing the temperature cause increase the solubility of carbon dioxide gas in the amine mixture. The optimal absorption conditions were obtained at pressure 1.6 bar, temperature 21 ℃ and time 1.5 hours. Finally, the mechanism of temperature effect on solubility via Lochatelier’s principle, the effect of pressure on solubility by Henry’s law, and the effect of time on solubility by examining the kinetics of the adsorption reaction was investigated.

کلیدواژه‌ها [English]

  • CO2 gas absorption
  • Amine Peprasine-Ionic liquid mixture
  • Vapor-liquid equilibrium
  • CMD
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مهندسی گاز ایران
دوره 10، شماره 1 - شماره پیاپی 17
مرداد 1402
صفحه 80-93
  • تاریخ دریافت: 22 خرداد 1402
  • تاریخ بازنگری: 05 مرداد 1402
  • تاریخ پذیرش: 28 مرداد 1402