scholarly journals Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1380
Author(s):  
Branislav Šulgan ◽  
Juraj Labovský ◽  
Miroslav Variny ◽  
Zuzana Labovská
Keyword(s):  
Ethyl Acetate ◽  
Heat Pump ◽  
Distillation Column ◽  
Reactive Distillation ◽  
Process Models ◽  
Final Decision ◽  
Acetate Production ◽  
Separation Unit ◽  
Multi Objective ◽  
Conventional Process

Multi-objective (energy–economic–safety) assessment of ethyl acetate production involving a heat pump is presented in this paper. The heat pump is designed to intensify ethyl acetate separation and to reduce the total operating cost. Two ethyl acetate production pathways are upgraded using a heat pump, conventional process and reactive distillation column with a separation unit. Detailed process models including the heat pump environment have been compiled and optimized in the Aspen Plus software. Both benefits and drawbacks of including the heat pump in the processes are evaluated using three different points of view: process energy, economics, and safety. As a result, using a heat pump is highly recommended in both conventional process and reactive distillation column with a separation unit. As a higher level of process integration is achieved using a heat pump, economic aspects are improved; however, safety aspects deteriorate. The final decision on the suitability of using a heat pump depends on whether it is proposed for an existing plant, or a completely new plant is designed. In a new plant, the concept of a thermally coupled process (reactive distillation column with a stripper column) has been proven to be the most promising.

scholarly journals Multi-Aspect Comparison of Ethyl Acetate Production Pathways: Reactive Distillation Process Integration and Intensification via Mechanical and Chemical Approach

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1618
Author(s):  
Branislav Šulgan ◽  
Juraj Labovský ◽  
Zuzana Labovská
Keyword(s):  
Ethyl Acetate ◽  
Case Studies ◽  
Chemical Reaction ◽  
Distillation Column ◽  
Reactive Distillation ◽  
Process Integration ◽  
Distillation Process ◽  
Acetate Production ◽  
Conventional Process ◽  
Set Up

This paper provides a multi-aspect comparison of selected methods of ethyl acetate production and shows the possibility of further reactive distillation process integration and sophisticated intensification including process stream regeneration. The production pathways were selected with respect to their practical applicability and sufficient experimental and feasibility studies already published. A total of four case studies were designed and compared: conventional process set-up (ethyl acetate is produced in a chemical reactor) is designed as a base case study; reactive distillation with a separation unit is derived from the conventional process set-up. The mechanical and chemical approach to reactive distillation process intensification and integration were assumed: reactive distillation column with a stripper and reactive distillation column with an auxiliary chemical reaction (ethylene oxide hydration). Process models were compiled in the Aspen Plus software. Complex process flowsheets of selected case studies including separation and regeneration were designed and optimized. Three different points of view were applied to evaluate the selected process benefits and drawbacks. Process energy, economy, and safety were assessed. As a result, a reactive distillation column with an auxiliary chemical reaction has been proven to be the most suitable pathway for ethyl acetate production assuming all three evaluated aspects.

scholarly journals Non-square open-loop dynamic model of methyl acetate production process by using reactive distillation column

2018 ◽  
Vol 154 ◽  
pp. 01008 ◽  
Author(s):  
Ahmad Misfa Kurniawan ◽  
Renanto Handogo ◽  
Hao-Yeh Lee ◽  
Juwari Purwo Sutikno
Keyword(s):  
Production Process ◽  
Dynamic Model ◽  
Methyl Acetate ◽  
Distillation Column ◽  
Reactive Distillation ◽  
Open Loop ◽  
Feed Ratio ◽  
Reflux Ratio ◽  
Acetate Production ◽  
Real Process

The development of mathematics model especially non-square open-loop dynamic model has grown rapidly since four decades. Because of the need of simplicity and accuracy, industrial world is demanding a dynamic mathematical model as simple as possible but it still can represent the whole real process. Therefore, to meet those needs, an open-loop dynamic model of methyl acetate production process by using reactive distillation column has been built. Feed ratio, reflux ratio and reboiler duty were chosen to be the manipulated variables to make a better performance rather than only reflux flowrate and reboiler duty. Methyl acetate fraction in distillate and water fraction in bottom were still be selected as controlled variables, so a non-square open-loop dynamic model was formed.

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