English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Nonlinear Behavior of Reactor-Separator Systems with Azeotropic Mixtures

Krishna, M. V., Pushpavanam, S., Kienle, A., & Vetukuri, S. R. R. (2006). Nonlinear Behavior of Reactor-Separator Systems with Azeotropic Mixtures. Industrial and Engineering Chemistry Research, 45(1), 212-222. doi:10.1021/ie0503693.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-9AC3-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-D15D-C
Genre: Journal Article
Alternative Title : Ind. Eng. Chem. Res.

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Krishna, M. V.1, Author
Pushpavanam, S.1, 2, Author              
Kienle, A.2, 3, Author              
Vetukuri, S. R. R.1, Author
Affiliations:
1Dep. of Chemical Engineering, Indian Institute of Tech., Madras, Chennai, India, persistent:22              
2Process Synthesis and Process Dynamics, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738153              
3Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              

Content

show
hide
Free keywords: -
 Abstract: In this work, the behavior of a coupled nonlinear reactor-separator system is analyzed. The reactor is modeled as a continuous stirred tank reactor (CSTR) that sustains a first-order reaction of the form A -> B. The separator is modeled as a flash. The effluent from the reactor is fed to the separator. Here, we assume that the liquid stream from the separator is recycled back to the reactor. The primary interest is to investigate the system when the vapor-liquid equilibrium (VLE) has an azeotrope. Under these conditions, the recycle stream can be either reactant-rich or reactant-lean depending on the feed composition to the flash. The focus is on pure mass recycle, as the two units are assumed to be decoupled energetically via heat exchangers. Two different modes of operations are considered. In the first mode of operation, the fresh feed flow rate is fixed. In the second mode of operation, the effluent flow from the reactor is fixed. In practise, these different modes of operation can be achieved using a suitable control strategy. When fresh feed to the network is flow-controlled, there is a region of dynamic instability in the solution branch corresponding to the recycle of the reactant-lean stream. In addition, coexistence of states with the recycle of reactant-rich and reactant-lean streams is possible. Our analysis indicates the presence of large regions of static and dynamic instabilities when the reactant-lean stream is recycled to the reactor and the effluent from the reactor is flow-controlled. Our results imply that the region in which the separator operates is very important in determining the behavior of the coupled system. Consequently, startup of the system is critical when the VLE of the system has an azeotrope. © 2006 American Chemical Society [accessed 2014 January 9th]

Details

show
hide
Language(s): eng - English
 Dates: 2006
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 248880
Other: 1/06
DOI: 10.1021/ie0503693
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Industrial and Engineering Chemistry Research
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, D.C : American Chemical Society
Pages: - Volume / Issue: 45 (1) Sequence Number: - Start / End Page: 212 - 222 Identifier: ISSN: 0888-5885
CoNE: https://pure.mpg.de/cone/journals/resource/954928546246