مقایسه مدل‌های HK، اDA و DS در تعیین توزیع اندازه حفرات جاذب‌های کربنی ریز حفره با استفاده از جذب دی اکسید کربن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشگاه کاشان، دانشکده مهندسی شیمی، گروه مهندسی

2 پژوهشگاه صنعت نفت، پژوهشکده گاز

چکیده

در این مقاله، ایزوترم جذب دی اکسید کربن در دمای K 273 بر روی پنج جاذب کربنی تجاری، به روش حجمی اندازه‌گیری شده است. در ادامه به کمک داده‌های تعادلی جذب، توزیع اندازه حفرات این جاذب‌ها، با سه مدل DS، DA و HK تعیین و مقایسه شده است. نتایج نشان می‌دهد، هر چند متوسط قطر حفرات به‌دست آمده از این مدل‌ها، تقریباً یکسان است ولی این مدل‌ها توزیع اندازه حفرات متفاوتی را ارائه می‌کنند. در ادامه نتایج حاصل از آنالیز عکس‌های HRTEM یکی از نمونه‌ها با نتایج مدل‌های مذکور، مقایسه شده است. نتایج نشان می‌دهد که میزان خطای متوسط برای مدل‌های DA، HK و DS به‌ترتیب برابر 04/2، 73/2 و 42/1 می‌باشد. بنابراین مدل DS به‌عنوان مدل برتر جهت تعیین توزیع اندازه حفرات معرفی می‌شود و مدل DA از نظر دقت پیش‌بینی، در رتبه آخر قرار می‌گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

Comparison of DA, DS and HK Models in Determination of Pore Size Distribution of Microporous Carbon Adsorbents Using CO2 Adsorption

نویسندگان [English]

  • A. Aleghafouri 1
  • M. Mahdyarfar 2
  • A. Mohajeri 2
  • M. Mohsen Nia 1
  • M. Asghari 1
1 Department‌ of Chemical Engineering, Engineering Department, Kashan University
2 Gas Research Institute, IRPI
چکیده [English]

In this paper, CO2 adsorption isotherms at 273 K are measured on five commercial carbonaceous adsorbents using volumetric method and their pore size distributions are determined and compared using DA, DS and HK models. The results show that although the average pore diameter obtained from these models are almost the same, these models show different pore size distributions. Then obtained results from HRTEM images of one of samples and these model results are compared. The results also show that the average error for HK, DA and DS models are 2.04, 2.73 and 1.42, respectively. Thus, DS model is introduced as the best model for determination of pore size distribution, and DA model gets the third rank.

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