قیاس فنی- اقتصادی فرآیندهای جذب سطحی و تقطیر آزئوتروپیک برای آب‌زدایی از اتانول صنعتی

نوع مقاله : ترویجی

نویسندگان

1 دانشیار مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه اراک، اراک

2 فارغ التحصیل کارشناسی ارشد مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه اراک، اراک

3 دانشجوی دکتری مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه اراک، اراک

چکیده

این پژوهش به مقایسه دو روش مرسوم جذب سطحی با زئولیت و تقطیر آزئوتروپیک برای آب­زدایی از اتانول صنعتی(%95) و تولید اتانول با خلوص %99/8 می­پردازد. بدین منظور، هر دو فرآیند با دبی خوراک مشابه kg/h136 شبیه­سازی شده و با استفاده از تحلیل فنی-اقتصادی، فرآیند مناسب­ انتخاب گردید. نتایج نشان داد که فرآیند جذب سطحی برای آب­گیری از اتانول، اقتصادی­تر از تقطیر آزئوتروپیک است؛ زیرا دارای سرمایه­گذاری کل و قیمت تمام­شده محصول پایین­تری است. میزان تولید در نقطه سربه­سر و مدت­زمان بازگشت سرمایه برای فرآیند جذب سطحی به ترتیب برابر L1,223,800 و 12ماه بوده و برای تقطیر آزئوتروپیک به ترتیب برابر L2,004,905 و 25ماه است. همچنین، سود خالص سالیانه، ارزش خالص طرح و بازده داخلی برای فرآیند جذب سطحی به ترتیب برابر 413,456دلار، 1,181,279دلار و %276 است که بسیار بالاتر از ارقام بدست­آمده برای فرآیند تقطیر آزئوتروپیک (به ترتیب برابر با 263,925 دلار، 979,370 دلار و %87) است.

کلیدواژه‌ها

عنوان مقاله [English]

Techno-economic comparison of adsorption and azeotropic distillation processes for industrial ethanol dehydration

نویسندگان [English]

  • Ehsan Salehi 1
  • Marzieh Moazzami Goodarzi 2
  • Mahdi Askari 3
1 Associate Professor, Chemical Engineering Department, Arak University, Arak, Iran
2 MSc, Chemical Engineering Department, Arak University, Arak, Iran
3 PhD Student, Chemical Engineering Department, Arak University, Arak, Iran
چکیده [English]

This work compares two conventional methods of adsorption with zeolites and azeotropic distillation for dehydration of industrial ethanol (95%) to produce 99.8% ethanol. To this end, both processes were simulated by a similar feed flowrate of 136kg/h and the suitable alternative was selected using techno-economical study. The results revealed that the adsorption process is more economical than azeotropic distillation for ethanol dehydration, as it possesses lower total investment cost and total product price. The amount of production at break-even point and the investment-return period for the adsorption process were equal to 1223800L and 12 months, respectively, and those for the azeotropic distillation were 2004905L and 25 months, respectively. In addition, the net annual profit, net present value and internal rate-of-return for adsorption process were equal to 413456$, 1181279% and 276%, respectively, which are much higher than those for the azeotropic distillation, equal to 263925$, 979370$ and 87%, respectively.

کلیدواژه‌ها [English]

  • Ethanol Dehydration
  • Simulation
  • Techno-Economic Assessment
  • Adsorption
  • Azeotropic Distillation

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