- 积分
- 28
- 注册时间
- 2013-6-7
- 积分
- 28
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Process simulation (Aspen Plus) homework
1．Problem Description:
A total of 100 lb-mol per hour of a 40 mol% methanol and 60 mol% water mixture is to be separated at 1 atm to give a distillate that contains 92 mol% methanol and a bottom product that contains 4 mol% methanol. A total condenser is to be used and the reflux will be returned to the column as a saturated liquid at its bubble point. An operating reflux ratio of 1.5 times the minimum will be used. The feed is introduced into the column as a saturated liquid at its bubble point.
Use Aspen Plus to complete the following: (a) generate a Txy diagram for the water-methanol system at 1 atm, (b)determine the minimum number of theoretical stages, (c) determine the minimum reflux ratio, (d) determine the heat loads of the condenser and reboiler for the condition of minimum reflux, (e) determine the quantities of the distillate and bottom streams using the actual reflux ratio, (f) determine the actual number of theoretical stages, (g) determine the heat load of the condenser for the actual reflux ratio, (h) generate a plot of the temperature profile and composition profile as a function of stage number (for both methanol and water).
(i)determine the diameter of the tray column or the packed column.
2．Problem Description:
A mixture containing 50.0 wt% acetone and 50.0 wt% water is to be separated into two streams in flash separation– one enriched in acetone and the other in water. The separation process consists of extraction of the acetone from the water into methyl isobutyl ketone (MIBK), which dissolves acetone but is nearly immiscible with water. The overall goal of this problem is to separate the feed stream into two streams which have greater than 90% purity of water and acetone respectively. A flash distillation (or separation) is essentially a one stage separation process and for our problem we are hoping to split our mixture into two streams; one composed of primarily water and acetone and one composed of primarily MIBK and acetone.
Use Aspen Plus to complete the following:
(a) Provide the complete stream table showing the composition of the three product streams resulting from your flash separation.
(b) Generating Txy Diagrams for the MIBK/acetone, MIBK/water, acetone/water system and residue curve diagram for MIBK/acetone/water system.
(c) Print out and turn in a copy of the plot for the liquid activity coefficient for the MIBK/acetone system (Hint: gamma)
(c)Compare the simulation results from last week to those obtained with the following three thermodynamic methods: IDEAL, WILSON, and NRTL. Show the stream table results for each thermodynamic method and write a sentence or two summarizing your findings.
3. Problem Description:
Aspen Plus PFR Reactors using kinetic ratesthe production of styrene from the dehydrogenation of ethylbenzene.Use Aspen Plus to complete the following: (1) Hand calculations on units conversion.(b) POLYMATH results and setup work.(c) Case 1 Aspen report with sensitivity analysis and associated graph.(d)Case 2 Aspen report sensitivity analysis and associated graph.哪位大神能帮小弟做一下不胜感激，小弟初学不会做！
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