مطالعه آزمایشگاهی و تئوری جذب گاز CO2 توسط محلول آب-مایع یونی-پپرازین به روش طراحی آزمایش رئوس حدی

نوع مقاله : پژوهشی

نویسندگان

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

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

چکیده

جداسازی گاز دی‌اکسید کربن از گاز طبیعی، به عنوان یکی از آلاینده­های اصلی محیط زیست، با استفاده از مخلوط آمینی، یکی از متداول‌ترین روش­هاست. در این پژوهش، ترکیب بهینه‌ی مخلوط آمینی با استفاده از روش طراحی رئوس حدی تعیین شد. مخلوط آمینی مورد استفاده در این پژوهش شامل آب، پپرازین و 1-بوتیل3-متیل ایمیدازولیوم هیدروژن سولفات بوده است. به منظور اندازه‌گیری حلالیت دی‌اکسید­کربن در محلول آمینی، از یک سلول تعادلی (اتوکلاو) استفاده گردید. طبق بررسی آنالیز واریانس، ضریب تبیین (R2) مقدار بالایی به میزان (%99/79=) دارد. تحلیل نتایج در سطح اطمینان %95 در یک بلاک با تعداد 9 آزمایش و تعریف لودینیگ به عنوان متغیر پاسخ انجام شد. نتایج بهینه‌سازی نشان داد که ترکیب متشکل از 811/24 میلی‌لیتر آب، 188 میلی‌لیتر آمین و 0/76 میلی‌لیتر مایع یونی بهترین راندمان را داشته و در این حالت بیشنه‌ی لودینگ 1/702 بدست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental and theoretical study of CO2 absorption by Water-Ionic liquid-Piperazine solution using the method of Constrained Mixture Design

نویسندگان [English]

  • Soheila Zare 1
  • Abdolrasoul Pouranfard 2
1 PhD Student in Chemical Engineering, school of Engineering, Yasuj University, Yasouj, Iran
2 PhD, Assistant Professor, School of Engineering, Yasouj University, Yasouj, Iran
چکیده [English]

Separation of carbon dioxide, as a main environmental pollutant, from natural gas using amine mixture is one of the most common methods. In this research, the optimal composition of the amine mixture was determined using the method of designing limit vertices. The amine mixture used in this research included water, piperazine and 1-butyl-3-methylimidazolium hydrogen sulfate. In order to measure the solubility of carbon dioxide in amine solution, an equilibrium cell (autoclave) was used. According to the analysis of variance, explanation coefficient (R2) has a high value (R2=99.79%). The analysis of the results was conducted at the 95% confidence level in a block with 9 tests and Ludinig's definition as the response variable. The optimization results showed that the combination consisting of 24.811 ml of water, 188 ml of amine and 0.76 ml of ionic liquid had the best efficiency and, in this case, the maximum loading of 1.702 was obtained.

کلیدواژه‌ها [English]

  • Carbon Dioxide
  • Amine Piperazine
  • Ionic liquid
  • Vapor-liquid Equilibrium
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