توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Simulation of urea prilling tower with rectangular sectional area
نویسنده(ها): ،
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۱۰
Melted urea droplets solidify under heat transfer caused by air flow in prilling tower and appear in the bottom of column as product. Urea prilling tower is simulated using both lumped and distributed models separately. Derived formulas in lumped and distributed models are solved by Rung–Kutta and finite difference methods successively and results of simulation are compared to results of a urea production industrial unit and performance of tower was foreseen by both methods. Non–optimal performance of tower will cause some problems such formation of clod in the bottom of tower. The results of simulation represented that decreasing of droplet diameter and increasing of air velocity cause outlet temperature drop. Since it seems the reasons of clod formation are insufficient heat transfer and high amount of urea outlet temperature, the formation of clod could be prevented by changing the tower conditions that results a decrease in urea outlet temperature.<\div>

۲Predicting propylene production yield of an industrial MAPD hydrogenation reactor by application of a statistical analysis model
اطلاعات انتشار: کنفرانس بین المللی علوم و مهندسی، سال
تعداد صفحات: ۵
In the present study, the attempt was performed to enhance propylene production yield of a methylacetylene–propadiene (MAPD) hydrogenation reactor of domestic olefin plant. Response surface methodology (RSM) by Minitab software was applied to investigate the effects of operating conditions (i.e. fresh feed flow rate, MAPD inlet concentration, the amount of diluent and hydrogen flow rates) on the propylene gain. A total of 192 experiments were selected according to multilevel factorial design and analysis of variance (ANOVA) was performed for each parameter. R2 values were obtained more than 0.95 and adjusted R2 were in a reasonable agreement with R2 values.<\div>
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