بررسی واکنش کاتالیستی اکسایش متان در حضور کاتالیست NiO و CuO در راکتور پلاسمای DBD: فراورده‌ها و مصرف انرژی

نوع مقاله : علمی-پژوهشی

نویسندگان

1 گروه مهندسی شیمی، واحد ماهشهر، دانشگاه آزاد اسلامی، ماهشهر، ایران

2 گروه مهندسی شیمی،واحد ماهشهر ،دانشگاه آزاد اسلامی ،ماهشهر،ایران

چکیده

در این پژوهش تأثیر تغییر ولتاژ مولد پلاسما بر روی واکنش اکسایش جزئی متان در یک راکتور پلاسمای DBD  و در سه حالت پلاسمای بدون کاتالیست، پلاسما به همراه کاتالیست نیکل اکسید و پلاسما به همراه کاتالیست مس اکسید  بررسی شد. نتیجه‌ها نشان داد که افزایش ولتاژ دستگاه از 6 به 10 کیلوولت درحضور کاتالیست نیکل باعث بیش­تر شدن درصدمولی متانول از 37/0 به 76/0 درصد و برای هیدروکربن‌های C2+  از 55/0 به 8/1 درصد می‌شود. درآزمایش پلاسما و کاتالیست مس تولید هیدروکربن‌های با ارزش در اثر زیادتر شدن ولتاژ کم­تر شد و درصد مولی متانول از 3/0 به 18/0 و درصد مولی ترکیب‌های C2+  از 82/0 به 23/0کاهش یافت. محاسبه مصرف انرژی در زمان افزایش ولتاژ دستگاه نشان داد که آزمایش‌ها در ولتاژ 6 کیلوولت با راندمان انرژی بالاتر معادل  17/0 میلی‌مول بر کیلوژول انجام شدند. در این ولتاژ و در حضور کاتالیست نیکل اکسید انتخاب گری کربن منواکسید 37 درصد و هیدروژن  58 درصد به دست آمد که بیشتر از دو حالت دیگر بوده و مقدار H2/CO  درگاز سنتز تولیدی به عدد 2 نزدیک‌تر شد. بنابراین انتخاب کاتالیست نیکل در راکتور پلاسما DBD  برای تولید هیدروکربن‌های با ارزش و یا گاز سنتز با مصرف انرژی کم­تر، بهتر از کاتالیست مس وپلاسمای بدون کاتالیست می‌باشد.

کلیدواژه‌ها

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