29 شهریور 1400
آزاده ميروكيلي

آزاده میروکیلی

مرتبه علمی: استادیار
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 21222026
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان A CFD modeling to investigate the impact of flow mal-distribution on the performance of industrial methanol synthesis reactor
نوع پژوهش مقالات در نشریات
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مجله APPLIED THERMAL ENGINEERING
شناسه DOI
پژوهشگران آزاده میروکیلی (نفر اول) ، علی بختیاری (نفر دوم) ، محمدرضا رحیمپور (نفر سوم)

چکیده

A two-step configuration consisting water-cooled and gas-cooled reactors has been developed by Lurgi to produce methanol from natural gas. The gas-cooled reactor, which is a vertical shell and tube heat exchanger, is constructed by fixed tube sheets with the cold gas stream in the tube side to properly cool the reacting gas mixture in the shell side. Under the practical operating condition, increase in the temperature drop is observed. As a result of high temperature decrease occurs at the end of the reactor, formation of gas condensate is observed in the fourth year of operation. In this regard, a computational fluid dynamics (CFD) model was developed to predict the behavior of gas streams in the shell and tube sides in order to find the reasons such phenomenea. The obtained results of the developed model were validated with the real plant data and a good agreement was observed. Then, gas velocity and temperature distributions in the shell and tube sides were presented. The obtained results show that the temperature maldistribution in the shell side is a result of non-uniform flow distribution in the shell and tube sides. Furthermore, this flow distribution non-uniformity inside the reactor comes from an improper design of the distributer inside the reactor.