Energy-saving performance of reactive distillation process for TAME synthesis through multiple steady state conditions

Yamaki, Takehiro; Matsuda, Keigo; Na-Ranong, Duangkamol; Matsumoto, Hideyuki

doi:10.1016/j.cep.2018.05.020

Cited by 12 publications

(9 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our previous study reported the condition in which multiple steady states exist, as shown in Figure 3 of previous work [15]. For a reflux ratio of 1, multiple steady states did not exist, but were observed at a reflux ratio of 2 for a reboiler duty between 12.25 and 12.12 MW.…”

Section: Process Characteristicsmentioning

confidence: 84%

“…The reaction conversion in the upper branch in the multiple steady states was the highest and increased with the reflux ratio. In addition, the energy-saving performance of reactive distillation consisting of one reactive distillation column and two recovery distillation columns for the multiple steady states was examined [15]. The energy consumption for TAME synthesis with multiple steady states became lower than that in the case in which multiple steady states did not exist because of the improvement in the reaction conversion and the reduction in the reboiler duties of the recovery columns.…”

Section: Of 11mentioning

confidence: 99%

“…TAME was obtained from the bottom-out stream. Table 1 lists the design and operating conditions of the reactive distillation column [15]. A mixture containing the reactant and an inert component was fed to the 15th stage of the column.…”

Section: Reaction Kinetics and Physical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Intensification of Reactive Distillation for TAME Synthesis Based on the Analysis of Multiple Steady-State Conditions

et al. 2018

Self Cite

View full text Add to dashboard Cite

Our previous study reported that operation in multiple steady states contributes to an improvement in reaction conversion, making it possible to reduce the energy consumption of the reactive distillation process for tert-amyl methyl ether (TAME) synthesis. This study clarified the factors responsible for an improvement in the reaction conversion for operation in the multiple steady states of the reactive distillation column used in TAME synthesis. The column profiles for those conditions, in which multiple steady states existed and those in which they did not exist, were compared. The vapor and liquid flow rates with the multiple steady states were larger than those when the multiple steady states did not exist. The effect of the duty of the intermediate condenser, which was introduced at the top of the reactive section, on the liquid flow rate for a reflux ratio of 1 was examined. The amount of TAME production increased from 55.2 to 72.1 kmol/h when the intermediate condenser was operated at 0 to −5 MW. Furthermore, the effect of the intermediate reboiler duty on the reaction performance was evaluated. The results revealed that the liquid and vapor flow rates influenced the reaction and separation performances, respectively.

show abstract

Section: Process Characteristicsmentioning

confidence: 84%

Section: Of 11mentioning

confidence: 99%

See 1 more Smart Citation

Intensification of Reactive Distillation for TAME Synthesis Based on the Analysis of Multiple Steady-State Conditions

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Kiatkittipong et al [40] used tert-butanol and glycerol etherification reaction to rectify the synthesis of glycerol ether and performed a series of simulations. Yamaki et al [41] synthesized tert-amyl methyl ether (TAME) by reactive distillation and found that the reboiler load required to obtain high-purity TAME increased with the increase in reflux ratio.…”

Section: Application Of Reactive Distillation In Ether Formation Reac...mentioning

confidence: 99%

Review of Neural Network Algorithm and Its Application in Reactive Distillation

2021

AJOCS

View full text Add to dashboard Cite

Artificial Neural Networks (ANN) can accurately identify and learn the potential relationship between input and output, and have self-learning capabilities and high fault tolerance, which can be used to predict or optimize the performance of complex systems. Reactive distillation integrates reaction and rectification into one device, so that the two processes occur at the same time and at the same place, but at the same time it also produces highly nonlinear robust behavior, making its process control and optimization unable to use conventional methods. Instead, neural network algorithms must be used. This paper briefly describes the research progress of neural network algorithms and reactive distillation technology, and summarizes the application of neural network algorithms in reactive distillation, aiming to provide reference for the development and innovation of industry technology.

show abstract

“…10,12,27 However, reactive distillation has strong nonlinear characteristics, especially the multiplicity, which have an important impact on the design, operation, and control of the reactive distillation system. 42,43 Yamaki et al 42 found that there was a phenomenon of output multiplicity in the tert-amyl methyl ether (TAME) RD column by simulation, but the mechanism of multiplicity and the effect of the multiplicity on process operation were not studied. Singh et al 43 analyzed the operating variables of the RD column in the acetic acid recovery process and believed that the superposition of phase equilibrium and reaction led to the multiplicity phenomenon in RD.…”

Section: Output Multiplicity Of Reactivementioning

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

Energy-saving performance of reactive distillation process for TAME synthesis through multiple steady state conditions

Cited by 12 publications

References 19 publications

Intensification of Reactive Distillation for TAME Synthesis Based on the Analysis of Multiple Steady-State Conditions

Intensification of Reactive Distillation for TAME Synthesis Based on the Analysis of Multiple Steady-State Conditions

Review of Neural Network Algorithm and Its Application in Reactive Distillation

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

Contact Info

Product

Resources

About