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Novel process for ethanolamine fractionation using diving wall column

Chai, Cong (2016). Novel process for ethanolamine fractionation using diving wall column. Bachelor of Engineering (4th Year Project) Thesis, Charles Darwin University.

Document type: Thesis
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Author Chai, Cong
Title Novel process for ethanolamine fractionation using diving wall column
Institution Charles Darwin University
Publication Date 2016-10
Thesis Type Bachelor of Engineering (4th Year Project)
Supervisor Koblov, Alexander
Abstract Monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) are produced by the reaction of ethylene oxide (EO) with large amounts of ammonia solution. Conventionally, in order to separate the MEA, DEA and TEA, a series of distillation columns are utilised. The common method is to use the conventional direct sequence to separate the ethanolamines which mean two distillations columns need to be employed. However, such conventional system has some drawbacks such as large plot area, high capital and operating costs. Hence, in this work the dividing wall column (DWC) technology will be applied to separate the ethanolamines. It has been known that usage of DWCs allows for both capital and operating savings when compared to conventional distillation arrangements.

The objective of this project is to investigate and design a separation system for fractionation of the ethanolamines and water by using a DWC in order to save both energy and capital cost. A number of different DWC systems will be modelled to find the best possible solution. To achieve this objective, the first step will be to simulate and to optimise the conventional system in order to understand its operating condition. The second step will be to model DWCs with different divvied wall arrangement. The final task will be to carry on a comparison of all designed distillation systems to evaluate which arrangement is the best solution for fractionation of the ethanolamines.

The results show that the DWC design will both save more capital and utility cost than conventional columns arrangement, which means DWC design saves column sizing and heat duty.
Keyword MEA
conventional column distillation
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Created: Thu, 19 Jan 2017, 10:48:04 CST by Jessie Ng