جذب سطحی دی‌بنزو‌تیوفن توسط نانوکامپوزیت کربن فعال پوست گردو/کیتوسان/آهن: سینتیک، تعادل، ترمودینامیک و مدل سازی انتقال جرم

نوع مقاله : پژوهشی

نویسندگان

1 استادیار، گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه یاسوج، یاسوج

2 دانشجوی کارشناسی ارشد، گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه یاسوج، یاسوج

3 دانشیار، گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه یاسوج، یاسوج

چکیده

حذف گوگرد و ترکیبات گوگردی از سوخت مایع از بحث­های تحقیقاتی می­باشد. در این پژوهش، کربن فعال توسط فعال­سازی شیمیایی از پوست گردو تهیه، سپس توسط نانوساختار آهن و پلیمر زیستی کیتوسان به صورت مجزا و با هم اصلاح و در جهت حذف دی­بنزوتیوفن از سوخت ایزواکتان استفاده شد. آنالیزهای BET، EDX-SEM و FTIR جهت بررسی جاذب استفاده شد. آزمایش­های تعادلی نشان داد که فرآیند جذب به صورت تک لایه و حداکثر ظرفیت جذب جاذب به ترتیب 285/71 و 178/57 میلی­گرم دی­بنزوتیوفن در گرم جاذب اصلاحی توسط نانوساختار آهن و در گرم جاذب اصلاحی توسط نانوساختار آهن و پلیمر کیتوسان می­باشد. نتایج داده‌های سینتیکی نشان داد که مدل سینتیک شبه مرتبه دوم با نتیجه تجربی همخوانی دارد. جهت تعیین پارامترهای انتقال جرم از مدل ریاضی نفوذ فیلم حفره سطح توسط نرم­افزار MATLAB استفاده شد و مشاهده گردید مراحل انتقال جرم خارجی و نفوذ حفره­ای در جذب دی­بنزوتیوفن اهمیت بیشتری دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Adsorption of Dibenzothiophene by Walnut Shell-Activated Carbon/Chitosan/Iron Nanocomposite: Kinetics, Equilibrium, Thermodynamics and Mass Transfer Modeling

نویسندگان [English]

  • Hakimeh Sharififard 1
  • fatemeh Boostani 2
  • Asghar lashanizadegan 3
  • parviz darvishi 3
1 Assistant Professor, Department of Chemical Engineering, Faculty of Technical Engineering, University of Yasuj, Yasuj, Iran
2 M.Sc Student, Department of Chemical Engineering, Faculty of Technical Engineering, University of Yasuj, Yasuj, Iran
3 Associate Professor , Department of Chemical Engineering, Faculty of Technical Engineering, University of Yasuj, Yasuj, Iran
چکیده [English]

Removing sulfur and sulfur compounds from liquid fuel is one of the most important research topics. In this research, activated carbon was prepared by chemical activation from walnut shells, then modified by iron nanostructure and chitosan separately and together, and used to remove dibenzothiophene from isooctane fuel. BET, EDX-SEM, and FTIR analyses were used to investigate the adsorbent. Equilibrium experiments showed that the adsorption process is a single layer, and the maximum adsorption capacity is 285.71 and 178.57 mg of dibenzothiophene per gram of adsorbent modified by iron nanostructure and per gram of adsorbent modified by iron nanostructure and chitosan, respectively. The results of kinetic data showed that the pseudo-second-order kinetic model is consistent with the experimental result. To determine mass transfer parameters, the mathematical model of film-pore-surface diffusion model was used by MATLAB software and it was observed that external mass transfer and pore diffusion stages are more important.

کلیدواژه‌ها [English]

  • Adsorption
  • Walnut Sell-Activated Carbon
  • Isooctane
  • Dibenzothiophene
  • Modeling

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