4460 Lecture 4 2011

4460 Lecture 4 2011 - CHEN 4460 Process Synthesis,...

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Unformatted text preview: CHEN 4460 Process Synthesis, Simulation and Optimization Dr. Mario Richard Eden Department of Chemical Engineering Auburn University Lecture No. 4 Sequencing Separation Trains September 13, 2011 Contains Material Developed by Dr. Daniel R. Lewin, Technion, Israel Sequencing Separation Trains Process Design/Retrofit Steps Assess Primitive Problem Development of Base-case Plant-wide Controllability Assessment Detailed Design, Equipment sizing, Cap. Cost Estimation, Profitability Analysis, Optimization Detailed Process Synthesis -Algorithmic Methods PART II Algorithmic Methods Lecture 4 Introduction Almost all chemical processes require the separation of chemical species (components), to: Purify a reactor feed Recover unreacted species for recycle to a reactor Separate and purify the products from a reactor Frequently, the major investment and operating costs of a process will be associated with separation equipment For a binary mixture, it may be possible to select a separation method that can accomplish the separation task in just one piece of equipment. More commonly, the feed mixture involves more than two components, involving more complex separation systems. Lecture 4 Objectives Be familiar with the more widely used industrial separation methods and their basis for separation. Understand the concept of the separation factor and be able to select appropriate separation methods for liquid mixtures. Example: Butenes Recovery 3 .3 1 19 6 .3 3 6 .1 F n-Pe nt ane 4 .0 2 16 1.4 3 .7 E c is -2 -But e ne 4 .12 15 5 .4 0 .9 D t r ans -2 -But e ne 3 .7 3 15 2 .0-0 .5 C n-But ane 3 .9 4 14 6 .4-6 .3 B 1-But e ne 4 .17 9 7 .7-4 2 .1 A Pr opane Pc, (MPa) Tc ( C) b.pt.( C) Species 3 .3 1 19 6 .3 3 6 .1 F n-Pe nt ane 4 .0 2 16 1.4 3 .7 E c is -2 -But e ne 4 .12 15 5 .4 0 .9 D t r ans -2 -But e ne 3 .7 3 15 2 .0-0 .5 C n-But ane 3 .9 4 14 6 .4-6 .3 B 1-But e ne 4 .17 9 7 .7-4 2 .1 A Pr opane Pc, (MPa) Tc ( C) b.pt.( C) Species Example: Butenes Recovery 100-tray column C3 & 1-Butene in distillate Propane and 1-Butene recovery Pentane withdrawn as bottoms n-C4 and 2-C4=s cannot be separated by ordinary distillation ( =1.03), so 96% furfural is added as an extractive agent ( 1.17)....
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This note was uploaded on 12/05/2011 for the course CHEM 4460 taught by Professor Eden during the Fall '11 term at Auburn University.

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4460 Lecture 4 2011 - CHEN 4460 Process Synthesis,...

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