مجله ی مهندسی مکانیک شریف

مجله ی مهندسی مکانیک شریف

مدل‌‌سازی ترمودینامیکی و ارزیابی عملکرد یک سیستم انرژی تولید هیدروژن پاک با استفاده از غشای جداساز پالادیومی با روش کمینه‌سازی انرژی آزاد گیبس و ضرایب نامعین لاگرانژ

نوع مقاله : مقاله پژوهشی

نویسنده
پریسا مجاور
گروه مهندسی مکانیک، دانشگاه صنعتی کرمانشاه، کرمانشاه، ایران.
10.24200/j40.2026.67527.1747
چکیده
در پژوهش حاضر، یک سیستم یکپارچه‌ی راکتور گازی‌سازی برای تولید هیدروژن پاک از زیست‌توده‌ی اکالیپتوس طراحی و بررسی شده است؛ که شامل: راکتور اصلاح بخار- متان، راکتور جابجایی آب- گاز، و غشاء پالادیومی برای جداسازی هیدروژن است. ترکیب فرآیندهای ذکرشده، امکان افزایش سهم هیدروژن در گاز سنتز و کاهش آلاینده‌ها را فراهم می‌سازد. معادله‌های حاکم در نرم‌افزار حل‌گر معادله‌های مهندسی پیاده­سازی، حل، و نتایج حاصل استخراج شده است. روش کار بر مبنای شبیه‌سازی ترمودینامیکی بوده و اعتبارسنجی نتایج با داده‌های تجربی موجود در ادبیات انجام شده است، که تطابق خوبی را نشان داده است. یافته‌ها حاکی از آن است که دمای گازی‌سازی، نقش تعیین‌کننده‌ای در ترکیب گاز تولیدی دارد؛ به‌طوری ‌که با افزایش دما، سهم هیدروژن در خروجی راکتور گازساز به میزان 26/15٪ و در راکتور اصلاح بخار-متان به میزان 71/20٪ افزایش یافته است، در حالی که این مقدار در راکتور جابجایی آب-گاز 12/2٪ کاهش نشان داده است. همچنین، افزایش دما موجب افزایش شار عبوری هیدروژن از غشاء پالادیومی از مقدار 29/0 به 52/1 ژول بر مترمربع ثانیه شده است.
کلیدواژه‌ها
کمینه‌سازی انرژی آزاد گیبس
ضرایب نامعین لاگرانژ
هیدروژن پاک
جابجایی آب- گاز
غشاء جداساز پالادیومی.
موضوعات

عنوان مقاله English

Thermodynamic Modeling and Performance Assessment of a Clean Hydrogen Production Energy System Using a Palladium Separation Membrane Based on Gibbs Free Energy Minimization and Lagrange Undetermined Multipliers Method

نویسنده English

Parisa Mojaver
Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah, Iran
چکیده English

In this study, an integrated system for producing clean hydrogen from eucalyptus biomass was designed and analyzed. The system consists of four main units: a gasification reactor, a steam-methane reforming reactor, a water-gas shift reactor, and a palladium membrane for hydrogen separation. The equations of the process were implemented and solved using Engineering Equation Solver (EES) software and the outcomes were validated against experimental data reported in the literature, showing good agreement. The findings indicate that gasification temperature plays a decisive role in determining the composition of the produced gas. Specifically, with increasing temperature, the hydrogen fraction at the gasification reactor outlet rose by 15.26% in the gasification reactor outlet and by 20.71% in the steam-methane reforming reactor, while it decreased by 2.12% in the water-gas shift reactor. Moreover, higher temperatures enhanced the hydrogen flux through the palladium membrane from 0.29 to 1.52 J/m2.s, highlighting the strong influence of operating conditions on system performance

کلیدواژه‌ها English

Gibbs free energy minimization
Lagrange undetermined multipliers
clean hydrogen
Water-gas shift reactor
Palladium separation membrane
 
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