English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Reactive separation of isobutene from C4 crack fractions by catalytic distillation processes

Qi, Z., Sundmacher, K., Stein, E., Kienle, A., & Kolah, A. (2002). Reactive separation of isobutene from C4 crack fractions by catalytic distillation processes. Separation and Purification Technology, 26(2-3), 147-163. doi:10.1016/S1383-5866(01)00156-3.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Qi, Zhiwen1, 2, Author           
Sundmacher, K.1, 3, Author           
Stein, E.4, Author           
Kienle, A.3, 4, Author           
Kolah, Aspi1, Author           
Affiliations:
1Process Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738151              
2State Key Lab. of Chem. Eng., School of Chem. Eng., East China Univ. of Science and Technology, Shanghai , China, persistent:22              
3Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              
4Process Synthesis and Process Dynamics, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738153              

Content

show
hide
Free keywords: reactive distillation; reactive separation; MTBE; C4 olefins; multiple steady states
 Abstract: Reactive distillation is a hybrid process where chemical reaction and distillative separation are performed in a single equipment. Even though reactive distillation could increase the selectivity of the desired product by the selective reaction this is not always true as shown in this work. A study on the MTBE reaction system using two coupled reactive distillation columns to separate a C4 crack mixture is carried out, where methanol acts as reactive entrainer and MTBE is the intermediate product. In the first column, isobutene and methanol react to form MTBE hence separating the inert C4 component, while in the second column MTBE splits back to methanol and isobutene. Methanol is recycled back to the MTBE formation column and isobutene is obtained as a product. This coupled process with direct recycle of methanol is possible only if no side reactions occur. When the side reactions are taken into account, byproducts such as diisobutene, dimethyl ether and water will be produced so that higher purity methanol can not be obtained at the bottom of the splitting column. The outlet of the splitting column must be firstly separated rather than being recycled directly to the formation column. Moreover, an attempt has been made to show how the selectivity of the desired product isobutene can be critically influenced by the operating parameters such as the reflux ratio. If the reflux ratio increases, a high quantity of diisobutene and dimethyl ether will be obtained which seriously affects the selectivity of isobutene. The influence of operating parameters is investigated by using a continuation method, which shows that bifurcation behavior can appear in both MTBE formation and decomposition process. (C) 2002 Elsevier Science B.V. All rights reserved.

Details

show
hide
Language(s): eng - English
 Dates: 2002
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 13768
DOI: 10.1016/S1383-5866(01)00156-3
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Separation and Purification Technology
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 26 (2-3) Sequence Number: - Start / End Page: 147 - 163 Identifier: -