کاتالیست‌های پوشش دهی طلا بر روی مس-سریا برای فرایند اکسایش ترجیحی کربن مونوکسید در جریان غنی از هیدروژن

نوع مقاله : علمی-پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده مهندسی شیمی، دانشگاه تهران

چکیده

ایران سرشار از منابع گازی است که می‌تواند مهم‌ترین منبع برای تولید هیدروژن به‌حساب آید. خالص‌سازی هیدروژن تولیدشده برای استفاده در فرایندهای گوناگون لازم است. یکی از کاربردهای هیدروژن در پیل‌های سوختی است که نیاز به خالص‌سازی از کربن مونوکسید و رساندن آن به میزان بسیار کم در حد ppm 10 است. علت این امر مسموم شدن آند پیل سوختی توسط کربن مونوکسید است.  استفاده از نانوکاتالیست­ ها به‌خصوص نانوکاتالیست­ های طلا برای خالص‌سازی هیدروژن در فرایندها از اهمیت خاصی برخوردار است. در این پژوهش نانوذره‌های با طلا پوشش دهی شده برای اکسایش گاز کربن مونوکسید در حضور گاز غنی هیدروژن مورد بررسی قرار گرفت که اثر به سزایی در میزان تبدیل این گاز داشت. در این کار از آنالیزهای FESEM، BET، XRD، TPR برای مشخصه ­یابی و FT-IR برای آزمون عملکرد کاتالیستی برای فرایند اکسایش ترجیحی کربن مونوکسید استفاده شد. نتیجه‌های آزمون عملکرد برای کاتالیست های سنتزشده CeO2 < Cu5%IMP-CeO2 < Au-CeO2 < Au-Cu5%IMP-CeO2 بود که نشان از اثر هم افزایی طلا و مس برای اکسایش ترجیحی کربن مونوکسید داشت.

کلیدواژه‌ها

موضوعات

مراجع

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