سنتز نانوکاتالیست NiMo بر پایه گِل قرمز و تقویت شده با زیرکونیا به روش تلقیح برای استفاده در فرایند هیدرودی‌سولفوریزاسیون برش‌های نفتی

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشگاه تربیت مدرس دانشکده شیمی

چکیده

 در سال­های اخیر، تحقیقات متعددی بر روی استفاده مجدد از مواد زائد مانند گِل قرمز انجام گرفته است،   زیرا حاوی اجزاء باارزش مانند آلومینا، سیلیکا و اکسیدآهن است و می­تواند به‌عنوان پایه کاتالیست­های فرایند هیدرودی­سولفوریزاسیون به‌کار گرفته شود. کاتالیست­های متداول این فرایند، NiMo/Al2O3 و CoMo/Al2O3 هستند که به‌منظور افزایش فعالیت آن­ها و درنتیجه تولید سوخت تمیزتر، تقویت‌کننده­هایی مانند زیرکونیا به کاتالیست افزوده می‌شود. برای نیل به این هدف، در این مقاله کاتالیست NiMo بر پایه گِل قرمز با درصدهای متفاوت زیرکونیا، به روش تلقیح سنتز شده است. برای بررسی خواص فیزیکی و ساختاری آن­ها از آنالیزهای XRD، FESEM، BET و FTIR استفاده شده است. نتایج حاصله، حاکی از این است که افزودن تقویت‌کننده زیرکونیا باعث توزیع یکنواخت ذرات روی سطح پایه، افزایش فاز فعال و کاهش تشکیل اسپینل نیکل در کاتالیست می­شود. ارزیابی عملکرد این نانوکاتالیست نشان‌دهنده‌ کاهش قابل توجه ترکیبات گوگرددار موجود در دو خوراک ایزودیزل و دیزل سبک، درنتیجه افزودن مقدار بهینه زیرکونیا به کاتالیست­های NiMo بر پایه گِل قرمز فعال شده است.

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