Comparison of Two Types of Two-Temperature Control Structures for Reactive Distillation Columns

2005 ◽  
Vol 44 (13) ◽  
pp. 4625-4640 ◽  
Author(s):  
Devrim B. Kaymak ◽  
William L. Luyben
Keyword(s):  
Temperature Control ◽  
Reactive Distillation ◽  
Distillation Columns ◽  
Control Structures ◽  
Two Temperature

scholarly journals Comparison of Temperature Control and Temperature Difference Control for a Kaibel Dividing Wall Column

Processes ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 773 ◽  
Author(s):  
Xing Qian ◽  
Rui Liu ◽  
Kejin Huang ◽  
Haisheng Chen ◽  
Yang Yuan ◽  
...  
Keyword(s):  
Temperature Control ◽  
Temperature Difference ◽  
Capital Investment ◽  
Temperature Sensors ◽  
Distillation Process ◽  
Control Structures ◽  
Dividing Wall Column ◽  
Dynamic Performances ◽  
Two Temperature ◽  
Better Than

A dividing wall column (DWC) effectively intensifies the distillation process with a reduced energy consumption, capital investment, and space. The three-product DWC has been investigated intensively and extensively; however, the four-product Kaibel DWC has received scarce attention. This study aimed to propose feasible control structures for the Kaibel DWC using only temperature sensors in order to promote its industrialization. Two temperature control structures, two temperature difference control structures, and two double temperature difference control structures were studied. The feasibility of the six proposed control structures was verified with a wide variety of feed disturbances. In most cases, temperature difference control was better than temperature control to maintain product purities. The dynamic performances proved that the inserted feed disturbances were handled well. These results help to promote the industrialization of the Kaibel DWC.

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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