Understanding the Impact of Operating Pressure on Process Intensification in Reactive Distillation Columns

2010 ◽  
Vol 49 (9) ◽  
pp. 4269-4284 ◽  
Author(s):  
Shaofeng Wang ◽  
Kejin Huang ◽  
Quanquan Lin ◽  
San-Jang Wang
Keyword(s):  
Reactive Distillation ◽  
Process Intensification ◽  
Operating Pressure ◽  
Distillation Columns ◽  
The Impact

Energy-saving investigation of vacuum reactive distillation for the production of ethyl acetate

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Ganesh N. Patil ◽  
Nirmala Gnanasundaram
Keyword(s):  
Ethyl Acetate ◽  
Reactive Distillation ◽  
Cooling Water ◽  
Design Parameters ◽  
Total Annual Cost ◽  
Operating Pressure ◽  
Cooling Water Temperature ◽  
Pressure Swing ◽  
The Impact ◽  
Better Than

Abstract Ethyl acetate (EtAc) reactive distillation (RD) configurations often use atmospheric pressure, and this operating pressure can be reduced further to conserve energy based on the condenser cooling water temperature. Using the Aspen Plus simulator, two proposed configurations, RD column with stripper and pressure swing reactive distillation (PSRD), were simulated at lower operating pressure. The impact of RD column operating pressure on total energy usage and total annual cost (TAC) was studied. All design parameters were optimized using sequential iterative optimization procedures and sensitivity analysis to minimize the energy cost while maintaining the required product purity at 99.99%. The simulation results showed that the RD column with a stripper is better than PSRD with a saving of 23.17% in TAC and 31.53% in the specific cost of EtAc per kg. Compared to literature results, the proposed configurations have lower reboiler duty requirements and lower cost per kg of EtAc.

scholarly journals Evaluation of mechanical vapor recompression in the reactive distillation of the N-butanol esterification process

2021 ◽  
Vol 10 (12) ◽  
pp. e243101220345
Author(s):  
Danyelle Fialho de Souza Rodrigues ◽  
Arthur Siqueira Damasceno ◽  
Wagner Brandão Ramos ◽  
Romildo Pereira Brito ◽  
Karoline Dantas Brito
Keyword(s):  
Distillation Column ◽  
Butyl Acetate ◽  
Reactive Distillation ◽  
Waste Heat ◽  
Process Intensification ◽  
Point Of View ◽  
The Other ◽  
Distillation Process ◽  
Distillation Columns ◽  
Vapor Recompression

The process of producing esters is usually performed through esterification in a reactor followed by a distillation column to separate the products. However, this design limits the reagent conversion. Reactive distillation is an alternative to get around this issue as it allows greater reagent conversions in reactions limited by chemical equilibrium. It is one of the most famous process intensification techniques. On the other hand, mechanical vapor recompression has been used to recycle waste heat to improve efficiency of conventional distillation columns. In this context, this work evaluated the inclusion of a mechanical vapor recompression system in a reactive distillation process to obtain n-butyl acetate via n-butanol esterification with acetic acid. Systems with and without recompression were simulated in an Aspen Plus™ environment. The addition of recompression resulted in a reduction of 33.65% in the annual cost of the process, while not significantly affecting the purity of the desired product and the reagents’ conversion. From an environmental point of view, the mechanical vapor recompression system adoption resulted in a 12.69% reduction in CO2 emissions, contributing positively to meeting the requirements of the environmental regulations.

scholarly journals Novel Hybrid Reactive Distillation with Extraction and Distillation Processes for Furfural Production from an Actual Xylose Solution

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1152
Author(s):  
Le Cao Nhien ◽  
Nguyen Van Duc Long ◽  
Moonyong Lee
Keyword(s):  
Production Process ◽  
Energy Use ◽  
Reactive Distillation ◽  
Process Efficiency ◽  
Continuous Stirred Tank Reactor ◽  
Butyl Chloride ◽  
Distillation Columns ◽  
Reactive Liquid ◽  
Pharmaceutical Industries ◽  
Furfural Production

Furfural is only derived from lignocellulosic biomass and is an important chemical used in the plastics, agrochemical, and pharmaceutical industries. The existing industrial furfural production process, involving reaction and purification steps, suffers from a low yield and intensive energy use. Hence, major improvements are needed to sustainably upgrade the furfural production process. In this study, the conventional furfural process based on a continuous stirred tank reactor and distillation columns was designed and optimized from an actual aqueous xylose solution via a biomass pretreatment step. Subsequently, a reactive distillation (RD) and extraction/distillation (ED) configuration was proposed for the reaction and purification steps, respectively, to improve the process efficiency. RD can remove furfural instantly from the reactive liquid phase and can separate heavy components from the raw furfural stream, while the ED configuration with toluene and butyl chloride used as extracting solvents can effectively separate furfural from a dilute aqueous stream. The results showed that the hybrid RD-ED process using a butyl chloride solvent saves up to 51.8% and 57.4% of the total investment costs and total annual costs, respectively, compared to the conventional process. Furthermore, environmental impacts were evaluated and compared for all structural alternatives.

Preliminary Design of Reactive Distillation Columns

2005 ◽  
Vol 83 (4) ◽  
pp. 379-400 ◽  
Author(s):  
R. Thery ◽  
X.M. Meyer ◽  
X. Joulia ◽  
M. Meyer
Keyword(s):  
Reactive Distillation ◽  
Preliminary Design ◽  
Distillation Columns
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