Control of vapor recompression distillation columns

1990 ◽  
Vol 29 (1) ◽  
pp. 59-71 ◽  
Author(s):  
Cristian A. Muhrer ◽  
Michael A. Collura ◽  
William L. Luyben
Keyword(s):  
Distillation Columns ◽  
Vapor Recompression

Application of Vapor Recompression to Heterogeneous Azeotropic Dividing-Wall Distillation Columns

2015 ◽  
Vol 54 (46) ◽  
pp. 11592-11609 ◽  
Author(s):  
Li Shi ◽  
Kejin Huang ◽  
San-Jang Wang ◽  
Jieping Yu ◽  
Yang Yuan ◽  
...  
Keyword(s):  
Distillation Columns ◽  
Vapor Recompression

Heat-integrated distillation columns: Vapor recompression or internal heat integration?

AIChE Journal ◽  
2012 ◽  
Vol 58 (12) ◽  
pp. 3740-3750 ◽  
Author(s):  
Andreas Harwardt ◽  
Wolfgang Marquardt
Keyword(s):  
Internal Heat ◽  
Heat Integration ◽  
Distillation Columns ◽  
Internal Heat Integration ◽  
Vapor Recompression

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.

Adaptive Control Strategies for Distillation Columns

1983 ◽  
Author(s):  
I.L. Chien ◽  
D.A. Mellichamp ◽  
D.E. Seborg
Keyword(s):  
Adaptive Control ◽  
Control Strategies ◽  
Distillation Columns

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.

Numerical simulation and experimental investigation of multiphase mass transfer process for industrial applications in China

2019 ◽  
Vol 36 (1) ◽  
pp. 187-214
Author(s):  
Chao Yang ◽  
Guangsheng Luo ◽  
Xigang Yuan ◽  
Jie Chen ◽  
Yangcheng Lu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Transfer Process ◽  
Transport Phenomena ◽  
Measurement Techniques ◽  
Mass Transfer Process ◽  
Industrial Applications ◽  
Economic Benefits ◽  
Distillation Columns ◽  
Stirred Reactors

Abstract This paper presents a comprehensive review of the remarkable achievements by Chinese scientists and engineers who have contributed to the multiscale process design, with emphasis on the transport mechanisms in stirred reactors, extractors, and rectification columns. After a brief review of the classical theory of transport phenomena, this paper summarizes the domestic developments regarding the relevant experiments and numerical techniques for the interphase mass transfer on the drop/bubble scale and the micromixing in the single-phase or multiphase stirred tanks in China. To improve the design and scale-up of liquid-liquid extraction columns, new measurement techniques with the combination of both particle image velocimetry and computational fluid dynamics have been developed and advanced modeling methods have been used to determine the axial mixing and mass transfer performance in extraction columns. Detailed investigations on the mass transfer process in distillation columns are also summarized. The numerical and experimental approaches modeling transport phenomena at the vicinity of the vapor-liquid interface, the point efficiency for trays/packings regarding the mixing behavior of fluids, and the computational mass transfer approach for the simulation of distillation columns are thoroughly analyzed. Recent industrial applications of mathematical models, numerical simulation, and experimental methods for the design and analysis of multiphase stirred reactors/crystallizers, extractors, and distillation columns are seen to garnish economic benefits. The current problems and future prospects are pinpointed at last.

Use of Different Kinds of Linear Models in Predictive Control of Distillation Columns

2000 ◽  
Vol 33 (10) ◽  
pp. 689-694 ◽  
Author(s):  
Gabriele Pannocchia ◽  
Daniele Semino
Keyword(s):  
Predictive Control ◽  
Linear Models ◽  
Distillation Columns
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