تصفیه محلول چهار جزئی آب/ اتانول/ استالدهید/ استیک‎اسید با بستر کربن فعال
DOR: 20.1001.1.17355400.1399.19.112.5.5

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مهندسی شیمی، پژوهشگاه شیمی و مهندسی شیمی ایران

2 استادیار پژوهشگاه شیمی و مهندسی شیمی ایران

چکیده

جذب سطحی با داشتن هزینۀ پایین، سادگی عملیات، ماهیت عمومی و بازدهی بالا یکی از رایج­ترین و کارامدترین روشهای جداسازی شناخته شده است؛ از این رو در این پژوهش، روش­ جذب سطحی با استفاده از کربن فعال، به‌عنوان جاذب، برای جداسازی سه آلایندۀ اتانول، استالدهید و استیکاسید از محلول آبی استفاده شد. این محلول شامل 5 درصد وزنی اتانول، 5/1 درصد وزنی استیک­اسید و 2/0 درصد وزنی استالدهید بود و در این فرایند سه اثر زمان ماند، دمای محلول و مقدار جاذب بررسی شد. همچنین آزمایشها با استفاده از روش RSM طراحی و بهینه­سازی شد و مقدار بهینۀ زمان ماند، دمای محلول و مقدار جاذب به‌ترتیب 4 ساعت، °C30 و 8/2 گرم جاذب به ازای هر سی‌سی محلول
به دست آمد. بیشترین میزان جداسازی برای اتانول، استیک­اسید و استالدهید به‌ترتیب
65، 85 و 85 درصد و ظرفیت جذب آن­ها نیز به‌ترتیب 4/144، 2/64 و 6/7 میلی­گرم جذب­شونده به ازای هر گرم جاذب حساب شد.

کلیدواژه‌ها


عنوان مقاله [English]

Treatment of Quaternary Solution of Water/Ethanol/Acetaldehyde/Acetic Acid by Activated Carbon Bed

چکیده [English]

Adsorption technology due to inexpensiveness, simplicity of operation, universal nature and effectiveness has been considered as one of the promising method of separation processes. Thereby in this study an adsorption process was applied by using activated carbon as adsorbent for separation of three pollutants of ethanol, acetaldehyde and acetic acid from aqueous solution. The solution contained 5 wt.% ethanol, 1.5 wt.% acetic acid and 0.2 wt.% acetaldehyde and in this work the effect of three parameters including retention time, solution temperature and adsorbent dosage were investigated. Moreover, the experiments were designed and optimized by RSM method and the results revealed that the optimal retention time, solution temperature and adsorbent dosage are 4 hr, 30°C and 2.8 g adsorbate/cc solution, respectively. The maximum amount of adsorption for ethanol, acetic acid and acetaldehyde was determined to be 65, 85 and 85%, respectively and their adsorption capacity was calculated to be 144.4, 64.2 and 7.6 mg adsorbate/ gr adsorbent.

کلیدواژه‌ها [English]

  • Adsorption
  • Quaternary Solution
  • Activated carbon
  • Experimental Design
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