Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

Xie, Jiangwei; Li, Chunli; Peng, Fei; Dong, Lihui; Ma, Shuaiming

doi:10.1016/j.cjche.2018.01.021

Cited by 16 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The internal diameter of every section is 40 mm. The height of the main column section and the reactive distillation section is 1 m. In the reactive distillation section, the SCPI and 3 × 3 mm 2 θ ring have a crossplacement, which is shown in the schematic of Figure 2, 52 and the main column is filled with the 3 × 3 mm 2 θ ring for separating the product. The SCPI developed by our group 53 is made of tin foil and a steel wire mesh assembled into a semicylindrical small box filled with catalysts, as displayed in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Liu

Cong

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

This paper aims at intensifying the synthesis process of solketal by the reactive dividing wall column (RDWC) through experiments and simulation optimization and proposes a high-efficiency production process of solketal. A lab-scale RDWC was set up to verify the feasibility of synthesizing solketal in the RDWC. The effects of different operating parameters, such as reflux ratio, liquid split ratio, molar ratio of acetone to glycerol, feeding method, and the mass flow rate of side stream, on the experimental process have also been demonstrated and analyzed. Furthermore, an equilibrium-stage model developed by Aspen Plus and verified through comparison with experiments was used for the following simulation to optimize and analyze the solketal synthesis process. The response surface methodology (RSM) was employed to optimize the multiobjective problem in RDWC. As a result, a novel competitive solketal synthesis process with an upper partition position RDWC was put forward, which could obtain 99.78% conversion and 99.22 wt % solketal product purity at a 2:1 molar ratio of acetone to glycerol and had a lower energy consumption per unit mass product of 2509.2 J·g–1 compared with other processes. The achievements of this research provide a new way to produce solketal and a significant guideline for the industrial applications of solketal synthesis in the reactive dividing wall column.

show abstract

Section: Methodsmentioning

confidence: 99%

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Liu

Cong

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The main process chemical reaction and separation are improved simultaneously (reactive distillation with an auxiliary chemical reaction [5,10]). Mechanical ways of RD intensification are focused on the use of special internal equipment of columns to ease the separation (reactive distillation with a dividing wall (RDWC) [11] or reactive distillation with pervaporation (RDPV) [3,7]), which intensifies the chemical reaction (special catalyst beds in case of a heterogeneous catalyst) [3,12]. Special attention is given to integrated columns with strippers (RDS) [5], recompression of overheated vapor, etc.…”

Section: Reactive Distillation Process Intensification and Integrationmentioning

confidence: 99%

“…Thus, a reliable thermodynamic model able to describe two liquid phases, azeotropic mixtures composition and boiling points, and dimerization in the vapor phase is required. Correct prediction of vaporliquid-liquid phase equilibria (VLLE) for such non-ideal system can be obtained using the NRTL-HOC thermodynamic model [39,40], which has been proven relevant in [3,9,11,37] providing good agreement of simulation results and experimental data. Furthermore, reliable parameters of the NRTL-HOC model are included in widely used databases (Aspen Plus [39], DECHEMA, NIST).…”

Section: Chemical System Descriptionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

“…Although the superiority of dynamic process intensification has been demonstrated by plenty of literature, to the best of our knowledge, there are no reports on the application of dynamic process intensification based on nonlinear characteristics to RD. In recent years, researchers have proposed a variety of enhanced technologies for RD, such as a reactive dividing wall column (RDWC), , reactive distillation with a side reactor, catalytic cycle distillation, etc., but these enhanced technologies were achieved by changing the process or equipment. If dynamic process intensification is applied to RD, it is expected to improve the time-averaged performance of the system in terms of conversion and energy consumption without increasing equipment investment costs.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Process Intensification of Dimethyl Ether Reactive Distillation Based on Output Multiplicity

Liu

Gao

Ren

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Dynamic process intensification technology is an emerging technology of process intensification. It adopts a nonsteady-state operation mode, which can improve the time-averaged performance of the reaction and distillation system without increasing equipment investment. This research proposes to implement dynamic process intensification in reactive distillation (RD) of methanol dehydration to dimethyl ether (DME). The multiplicity of the reactive distillation process is studied by bifurcation analysis, which uses the heat duty of reboiler as a bifurcation parameter and uses the flow rate and mole fraction of the distillate as the dependent variables (state variables). Based on the output multiplicity of the system, the dynamic intensification process for periodically switching the auxiliary products is established. Compared with the steady-state operation, the time-averaged conversion of the system under nonsteady-state operation is increased by 3.49%, and the heat duty of the reboiler is reduced by 6.00 kW. Finally, dynamic optimization (DO) of RD is studied through the control vector parametrization (CVP) method by using conversion and the heat duty of reboiler as the objective functions. The optimal cyclic steady state is obtained when the duration of the operation period with high yield is 1.1 h; correspondingly, the duration of the operation period with high purity is 0.1 h.

show abstract

Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

Cited by 16 publications

References 25 publications

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

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

Dynamic Process Intensification of Dimethyl Ether Reactive Distillation Based on Output Multiplicity

Contact Info

Product

Resources

About