تبدیل نوری آلاینده زیست محیطی هیدروژن سولفید و تولید سوخت هیدروژن با استفاده از کاتالیزگر نانوکامپوزیتی مغناطیسی پایه کربن
الموضوعات :مجید غنیمتی 1 , محسن لشگری 2 , مهچهره ثابتی 3
1 - دانشگاه تحصیلات تکمیلی علوم پایه زنجان
2 - دانشگاه تحصیلات تکمیلی علوم پایه زنجان
3 - دانشگاه تحصیلات تکمیلی علوم پایه زنجان
الکلمات المفتاحية: فوتوتخریب/تبدیل H2S, تولید هیدروژن, انرژی¬مواد نانوکامپوزیت مغناطیسی, نانولوله کربنی, ماده خطرناک, تبدیل آلاینده به سوخت, کاتالیزگر نیم¬رسانا,
ملخص المقالة :
هیدروژن سولفید یک آلاینده خطرناک زیست محیطی، خورنده و اشتعال پذیر است که در صنایع نفت و گاز ترش در مقیاس وسیع تولید می شود. یکی از استراتژی های پایدار برای حذف این آلاینده زیست محیطی و تبدیل آن به سوخت پاک هیدروژن، استفاده از منابع تجدید پذیر انرژی (فوتون) و سنتز نانوانرژی مواد نیم رسانا است. برای این منظور در پروژه حاضر ترکیب نانوساختار نیم رسانای مغناطیسی MgFe2O4 سنتز شد و برای تولید هیدروژن از طریق شکافت فوتوکاتالیستی محلول قلیایی H2S مورد استفاده قرار گرفت. شواهد تجربی نشان داد ترکیب سنتزی از توانایی لازم برای احیای پروتون و تولید هیدروژن برخوردار است. همچنین با سنتز ترکیب نانوکامپوزیتی مغناطیسی CNT/MgFe2O4 اثر تقویتی نانولوله کربنی بر فعالیت فوتوکاتالیست مذکور مطالعه شد. بررسی ها نشان داد حضور نانولوله کربنی از طریق افزایش مساحت سطح فوتوکاتالیست، کاهش فرایند بازترکیب الکترون-حفره و افزایش جذب فوتون، تولید هیدروژن را به مقدار قابل توجهی افزایش می دهد. سرعت آزادسازی هیدروژن 1284 میکرو مول بر ساعت به ازای 2/0 گرم فوتوکاتالیست بدست آمد که بیانگر آن است ماده ی نانوکامپوزیتی سنتز شده از توانایی بالایی برای حذف آلاینده و تولید سوخت هیدروژن برخوردار است.
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