بررسی عملکرد بسترهای فلزی غیر نجیب و ارزان قیمت جهت تولید گاز اکسیژن درفرآیند الکترولیز قلیایی آب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی فیزیک، دانسکده شیمی، دانشگاه صنعتی اصفهان، اصفهان، ایران

2 شیمی کاربردی-دانشکده شیمی-دانشگاه صنعتی اصفهان-اصفهان-ایران

3 گروه شیمی، دانشکده شیمی، دانشگاه صنعتی اصفهان، اصفهان، ایران

چکیده

یکی از روشهای عمده تولید گاز اکسیژن با خلوص بالا الکترولیز آب می باشد. در این فرآیند، آب به عناصر سازنده اش یعنی اکسیژن و هیدروژن تجزیه میشود. در این مطالعه از بسترهای مختلف فلزی ارزان قیمت شامل فوم نیکل، ورق استیل، توری نیکل، ورق برنج و ورق مس به عنوان الکترود اکسیژن بهره گرفته شده است. از آزمایشهای الکتروشیمیایی ولتامتری چرخ های، ولتامتری روبش خطی و منحنی تافل نیز جهت بررسی عملکرد الکترودها استفاده شده است. نتایج حاصل از این بررسی نشان داد که فوم نیکل پتانسیل مازاد کمتری را در چگالی جریان های 50 mA cm-2و به خصوص 150 mA cm-2نسبت به دیگر نمونه ها دارد. پتانسیل مازاد فوم نیکل در چگالی جریان mA 442 mV ،50 cm-2و در چگالی جریان mV580 ،150 mA cm-2 می باشد که نسبت به دو نمونه ی توری نیکل و ورق استیل به ترتیب، mV 50و 48 mVپتانسیل مازاد کمتری دارد. علاوه بر این فوم نیکل در شرایط واقعی عملکرد مناسبی داشت به طوری که بازده آن در دماهای 40 ،20و 60درجه سانتیگراد به ترتیب، 59.24 ،61.83و 67.70درصد می باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Performance evaluation of non-noble and Inexpensive metal substrates for oxygen production in alkaline electrolysis

نویسندگان [English]

  • Mohammad Zhiani 1
  • afshin mohammadi tamajani 2
  • Fariba Jalili 3
1 Department of chemistry, faculty of chemistry, Isfahan university of technology, Isfahan, Iran
2 Department of chemistry, Isfahan University of Technology, Isfahan, Iran
3 Department of chemistry, Faculty of chemistry, Isfahan university of technology, Isfahan, Iran
چکیده [English]

Water electrolysis is the major method for production of high purity oxygen gas. In this process, water decomposes into its elemental constituents, oxygen and hydrogen gases. In this study, various inexpensive substrates such as nickel foam, stainless steel sheet, nickel grid, brass sheet and copper sheet used as an oxygen electrode. The electrochemical techniques such as cyclic voltammetry and linear sweep voltammetry were used to evaluate the performance of electrodes. The obtained results of this study showed that nickel foam has a lower overpotential in the current density of 50 and especially 150 mA cm-2 than other samples. The overpotential of nickel foam at a current density of 50 and 150 mA cm-2 were, 442 and 580 mV respectively, which is low than two nickel mesh 60 mV and stainless steel sheet 48 mV, have less overpotential. In addition, nickel foam had a good performance in real condition and its cell efficiency at 25, 40 and 60 ° C showed 59.24, 61.83 and 67.70 percent, respectively.

کلیدواژه‌ها [English]

  • water electrolysis
  • oxygen gas
  • nickel foam
  • metal substrates

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سوخت و احتراق
دوره 11، شماره 2
شهریور 1397
صفحه 79-89

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سابقه مقاله

  • تاریخ دریافت: 01 اردیبهشت 1397
  • تاریخ بازنگری: 30 اردیبهشت 1397
  • تاریخ پذیرش: 08 خرداد 1397

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