مطالعه آزمایشگاهی ضریب نفوذ مولکولی اتیلن در حلال نرمال متیل پیرولیدون

نوع مقاله : علمی-پژوهشی

نویسندگان

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

چکیده

در این مطالعه، با اخذ داده ­های آزمایشگاهی نفوذ گاز در حلال ساکن و استفاده از مدل­ های ریاضی مبتنی بر قانون دوم فیک، ضریب نفوذ مولکولی محاسبه  شد. هدف از این مطالعه، محاسبه ضریب­ های نفوذ مولکولی اتیلن در حلال نرمال متیل پیرولیدون (NMP) در فشارهای اولیه 600 ، 800  و 1100کیلوپاسکال و دماهای 1/278، 1/298 و 1/328 کلوین با استفاده از دو مدل موجود می­ باشد. هر چند همانند مطالعات گذشته، نتیجه ­های آزمایشگاهی ناشی از هر دو مدل نشان می‌دهد که ضریب نفود مولکولی  با افزایش دما افزایش می­ یابد ولی نوع وابستگی به دما به صورت  DAB =A.Tn در دیدگاه پژوهشگران متفاوت بوده است. برای بررسی، نتیجه­ های آزمایشگاهی با پیش بینی مدل وایلک ـ چانگ که در آن 65/5 n= و مدل دیاز که در آن 5/8 n = می­ باشد مقایسه شد و نشان داده شد که پیش بینی مدل دیاز با داده ­های آزمایشگاهی این پژوهش ارتباط بهتری نشان می ­دهد.

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