سنتز و بهبود مشخصه های زئولیت 11-ZSM با فلزهای واسطه برای کاربرد کاتالیستی آن در گوگردزدایی اکسایشی

نوع مقاله : علمی-پژوهشی

نویسندگان

گروه شیمی، دانشکده فیزیک و شیمی، دانشگاه الزهرا (س)، تهران، ایران

چکیده

زئولیت 11- ZSM به‌طور موفقیت آمیز با استفاده از روش دانه و با قالب آلی پیشنهادی N،N- دی‌اتیل‌آنیلین سنتز شد. افزون بر این، تأثیر نسبت سیلیسیم به آلومینیوم بر روی دانه بررسی و نسبت بهینه 10به ­دست آمد. زئولیت‌های سنتز شده با استفاده از فناوری‌های FT-IR، EDX، SEM، BET و XRD شناسایی شدند. از زئولیت‌ سنتز شده به‌عنوان کاتالیست ناهمگن در فرایند گوگردزدایی  اکسایشی برای مدل نفتی شامل n-هپتان و دی‌بنزوتیوفن استفاده شد. برای به­ دست آوردن شرایط بهینه‌ی واکنش اثر دما و مقدار کاتالیست مورد بررسی قرار گرفت و دمای 100 و مقدار g 05/0 به‌عنوان دما و مقدار کاتالیست بهینه انتخاب شد و تأثیر زمان در شرایط بهینه برای کاتالیست­ های گوناگون بررسی شد. همچنین درصد تبدیل دی‌بنزوتیوفن زئولیت‌های تبادل یونی شده با فلزهای واسطه‌ی گوناگون از جمله مولیبدن، وانادیوم، لانتانیم، کبالت، مس و سریم توسط کروماتوگرافی گازی محاسبه و با یک­دیگر مقایسه شد. نتیجه­ ها نشان داد که کاتالیست 11-ZSM/Mo فعالیت اکسایش بالایی در مقایسه با سایر کاتالیست­ ها در واکنش گوگردزدایی اکسایشی دارد.

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موضوعات

مراجع

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