CHE 501 Assignment 9 - ChE 501 Fall 2016 HW Assignment 9...

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Unformatted text preview: ChE 501 Fall 2016 HW Assignment 9 Solution 1. A reaction process is designed to produce methanol Mfrom methane, CH4, and oxygen, 02. The possible reactions include the following. CH4 +— %02 => CH30H [1] CH4 + 2202 3 C021 2H20 ~. [2] CH30H + $02 :> C02 + 2H20 [3] How many independent reactions are there? How many independent material balances? The feed flow—rate is 200 mol/h, and the feed contains 200 % excess methane and no methanol. Draw and label a flow diagram and find the composition of the feed stream. If all of the limiting reactant is consumed, and the selectivity of methanol with respect to carbon dioxide is 10.0, find the composition and flow rate of the product stream. f There are two independent reactions and five independent material balances. n mol CH l h n1; mol CH4I h n; mol 02711 nZF mol 02 I h React” n3 mol CH30H I h m mol C02] h n5 mol H20 l h The information given about the feed provides two equations. The total feed is the sum of component feeds. n1F + n,F = 200 The excess methane is based on the amount fed and the amount required to consume all of the oxygen. .. -1 MW—ZH .mols.CH .req _ 2F 4 molsl O2 - fed IF—2n2F 200%- excess— - 2. 00: IF = 6n2F n21: 6n2F +n2F =200 n2F =27fl=286 n”, =200—28.6=171 The feed stream is 14% oxygen and 86% methane. ...
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