Liquid Split 70% of liquid stream goes to distillation column Purge Stream Purge rate is 8% of vapor recycle stream Reactor Stoichiometry Conversion Outlet temperature Pressure dropīenzene + 3H2  Cyclohexane 99.8% of benzene 400☏ 15psi Hydrogen Feed (H2FEED) Hydrogen Nitrogen Methane Benzene Total Flow (lbmol/hr) Temperature (☏) Pressure (psia)ĭistillation Column Number of stages Feed stage Reflux Ratio Cyclohexane recovery Condenser Pressure Reboiler Pressureġ5 8 1.2 99.99 mole % in bottoms 200 psia 210 psiaįeed Preheater Outlet Temperature Outlet Pressure Process operating specifications are listed on the following page.įeed Streams Benzene Feed (BZFEED) Hydrogen Nitrogen Methane Benzene Total Flow (lbmol/hr) Temperature (☏) Pressure (psia) The majority of the liquid stream leaving the flash tank goes to a distillation column to purify the cyclohexane product, while a small portion of the liquid stream is recycled back to the feed mixture to minimize losses of benzene. The vapor stream coming off the flash tank is recycled back to the feed mixture after a small purge stream is removed to prevent impurities from building up in the system. The reactor effluent stream is then sent to a flash tank to separate the light and heavy components of the mixture. This simulation will use a conversion reactor block to model this reaction. This feed mixture is then sent to a fixed-bed catalytic reactor where 3 hydrogen molecules react with 1 benzene molecule to form cyclohexane. Fresh benzene and hydrogen feed streams are first fed through a heater to bring the streams up to reactor feed temperature and pressure conditions. The simplified flowsheet for this process is shown below.

Background/Problem Construct an Aspen HYSYS simulation to model the production of cyclohexane via benzene hydrogenation. Lesson Objectives  Ĭonstruct an Aspen HYSYS flowsheet simulation of the production of cyclohexane via benzene hydrogenation Become familiar with user interface and tools associated with Aspen HYSYSĪspen HYSYS V8.0 Knowledge of chemical process operationsģ.

AspenTech Incorporations Aspen Hysys V8.8Ĭases Solved in Hysys Version 8.0 are same as Version 8.8Ĭyclohexane Production with Aspen HYSYS® V8.0 1.

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