شبیه‌سازی عددی فرآیند الکترولیز آب شور به کمک امواج الکترومغناطیسی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مکانیک، دانشگاه تربیت مدرس، تهران، ایران

چکیده

در این تحقیق فرآیندهای الکترولیز آب شور و الکترولیز الکترومغناطیسی آب شور در هندسه متقارن محوری و به صورت‌های پایا و وابسته به فرکانس شبیه‌سازی شده است. معادلات پیوستگی و نویر استوکس برای جریان سیال، معادله نرنست پلانک برای انتقال شار جرمی ذرات و معادلات ماکسول برای امواج الکترومغناطیس در نظر گرفته شده‌اند. اعمال امواج الکترومغناطیسی به آب، موجب افزایش جنبش مولکولی شده و در نتیجه با عبور جریان کمتر از قطب‌های آند و کاتد، فرآیند تجزیه املاح صورت می‌پذیرد. همچنین با عبور جریان کمتر از قطب‌ها، سرعت خوردگی نیز کاهش می‌یابد. نتایج شبیه‌سازی نیز حاکی از تاثیر قابل توجه امواج الکترومغناطیس در جداسازی یون‌های کلر و سدیم بوده است. بر اساس نتایج میزان جداسازی یون‌ها در فرآیند الکترولیز الکترومغناطیسی آب شور بیش از سه برابر جداسازی یون‌ها در فرآیند الکترولیز آب شور بوده است. همچنین تاثیر پارامترهای مختلفی چون قطر آند، ولتاژ الکتریکی و غلظت الکترولیت شبیه‌سازی گردیده و نتایج مقایسه شده‌اند.  نتایج حاکی از افزایش میزان جداسازی یون‌ها با افزایش هر یک از پارامترهای ولتاژ و غلظت الکترولیت است. این در حالی است که بیشترین و کمترین میزان جداسازی یون‌ها در قطرهای الکترود 8 و 16 میلیمتر حاصل شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Numerical Simulation of the saline water electrolysis process using electromagnetic waves

نویسندگان [English]

  • akbar eghbali
  • mohammad reza karafi
  • Mohammad Hossein Sadeghi
tarbiat modares university
چکیده [English]

Microwave irradiation has been used to speed up chemical reactions in comparison to conventional reactions. Because the electromagnetic waves cause increasing molecular vibrations. Energy consumption is reduced by using electromagnetic waves. As a result, electrode corrosion rate is reduced. In this article, a numerical method has been used to compare saline water electrolysis (EL) and saline water electromagnetic electrolysis reactor (EMER). Axisymmetric geometry is considered in simulations and steady and frequency dependent analysis are conducted. Continuity equations and Navier-Stocks equation for fluid flow, and Nernest-Planck equation for mass transfer flow, and the maxwell equation for electromagnetic wave modeling are taken into account. At the first, the effect of electromagnetic waves on the ion separation has been investigated. Results have shown that an obvious enhancement has occurred in ion separation due to electromagnetic irradiation. The dechlorination in EMER process has been improved more than three times in comparison with EL process. Also, the ion separation has been enhanced linearly by increasing the cell potential and initial salinity. The quantitative results of each parameter are shown in the paper.

کلیدواژه‌ها [English]

  • electrolysis
  • electromagnetic waves
  • numerical simulation

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نشریه مهندسی مکانیک امیرکبیر
دوره 55، شماره 11
بهمن 1402
صفحه 1333-1352

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