سینتیک و تعادل گوگردزدایی جذبی از سوخت مدل توسط کربن فعال سنتز شده از پسماند گلاب‌گیری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه فنی مهندسی بویین زهرا

2 کارشناس ارشد، مهندسی شیمی، دانشگاه تربیت مدرس، دانشکده مهندسی شیمی

3 دانشگاه تربیت مدرس دانشکده شیمی

چکیده

چند نمونه کربن فعال ارزان قیمت از پسماند گلاب‌گیری به روش فعال‌سازی شیمیایی توسط عامل فعالساز KOH با نسبت‌های‌ عامل فعال‌ساز به پسماند گلاب‌گیری مختلف(5/0، 1 و 2) با نام‌های (ACR-0.5,ACR-1, ACR-2) تولید شد. یکی از نمونه‌ها توسط نانو ذرات مس بارگذاری شد. نمونه‌های تولید شده توسط روش‌های مختلفی از جمله FESEM، FTIR و BET آنالیز شدند. نمونه‌ها در گوگردزدایی از سوخت مدل شامل نرمال هپتان و ترکیب گوگرددار 4و6-دی‌متیل-دی‌بنزوتیوفن (4,6-DMDBT) مورد بررسی قرار گرفتند. نتایج نشان داد که نمونه‌های ACR با مساحت سطح بین 1330 تا 2155 متر مربع بر گرم به دست آمده اند. مساحت سطح BET و حجم حفره ها با افزایش نسبت عامل فعال ساز و بارگذاری مس افزایش پیدا کرد. بیشتر از 95% حداکثر ظرفیت جذب نمونه‌های مختلف در 10 دقیقه ابتدای آزمایش جذب بدست می‌آید. بازدهی نمونه‌های کربن فعال با افزایش نسبت عامل فعال‌ساز و بارگذاری مس، افزایش یافت. ترتیب جذب 4,6-DMDBT: ACR-2-Cu> ACR-2> ACR-1> ACR-0.5 است. حداکثر ظرفیت جذب نمونه ACR-2-Cu، به دلیل حجم حفرات میکرو و حضور نانو ذارت مس mg S/g 24 است. داده‌های سینتیکی به خوبی توسط مدل‌های شبه مرتبه اول و مرتبه دوم توصیف شدند و داده‌های جذب تعادلی نیز به خوبی توسط مدل‌های لانگمیر و فرندلیچ برای تخمین پارامترهای جذب، برازش شدند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Adsorption Kinetics and Equilibrium of Model Fuel Desulfurization by Activated Carbon Synthesized from Rose Damascena Waste

نویسندگان [English]

  • elham moosavi 1
  • Davod Hajian 2
  • Ramin Karimzadeh 3
1 Department of materials, chemical and polymer engineering, buein zahra technical university, buein zahra, qazvin, Iran
2 Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
3 Tarbiat Modares University
چکیده [English]

Samples of low-cost activated carbons were synthesized from rose damascena waste by chemical activation using KOH as an activator with different KOH to rose damascena waste ratios (0.5, 1 and 2) as named ACR-0.5, ACR-1, ACR-2.  One sample was loaded with copper nanoparticles (ACR-2-Cu). The synthesized activated carbons have been characterized using FESEM (Field Emission Scanning electron microscopy), FTIR (Fourier transform infrared spectroscopy) and BET surface area analyzer. All activated carbon samples were used in desulfurization of a model diesel fuel composed of n-Heptane   4,6-dimethyldibenzothiophene (4,6-DMDBT) as sulfur containing compound. Results showed that ACRs with BET surface areas up to 1330-2155  were obtained. The BET surface areas and pore volumes increased with KOH to rose damascena waste ratio and Cu functionalization. More than 95% of 4,6-DMDBT adsorption capacity was reached in the first 10 min of adsorption experiment. The efficiency of sulfur removal by ACR was increased by enhancement the KOH to rose damascena waste ratio and by Cu functionalization. The 4,6-DMDBT adsorption capacity follows the order: ACR-2-Cu> ACR-2> ACR-1> ACR-0.5. The maximum adsorption capacity of ACR-2-Cu sample to 4,6-DMDBT was 24 mg S/gr adsorbent and the adsorption capacity was related to the volume of narrow micropores and Cu nanoparticles. The kinetic data was well described by pseudo-second and first-order kinetic models and the equilibrium adsorption data was well fitted to the Langmuir and Freundlich models to estimate the adsorption parameters.
 
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کلیدواژه‌ها [English]

  • Rose Damascena waste
  • Activated Carbon
  • Desulfurization
  • 4
  • 6-DimethylDibenzothiophene
  • Adsorption

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  • تاریخ دریافت: 07 مرداد 1400
  • تاریخ بازنگری: 03 مهر 1400
  • تاریخ پذیرش: 10 اسفند 1400

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