Controllability of separate heat pump distillation for separating isopropanol-chlorobenzene mixture

Zhu, Zhaoyou; Liu, Xingzhen; Cao, Yujuan; Liang, Shisheng; Wang, Yinglong

doi:10.1007/s11814-016-0313-1

Cited by 9 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hosgor et al proposed a pressure-compensated temperature control structure to control the pressure. In addition, studies on dynamic control for extractive distillation, ,− reactive distillation, ,, batch distillation, , and other separation methods − have received increasing attention; until now, there have been few reports on the dynamic control of TCPSD . Because of the relatively high number of operating parameters and the interactions within multicomponent systems, designing the required control structure is difficult and complex.…”

Section: Introductionmentioning

confidence: 99%

Heat Integration and Control of a Triple-Column Pressure-Swing Distillation Process

Zhu

Jia

et al. 2017

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Heat integration and dynamic characteristics are critical for the triple-column pressure-swing distillation (TCPSD) processes that are used to separate ternary or multicomponent systems. In this study, rigorous steady-state simulations of heat-integrated TCPSD processes are optimized using Aspen Plus, and dynamic strategies for the different TCPSD processes are explored using Aspen Dynamics. When ±20% feed flow rates and composition disturbances are introduced, the composition/temperature cascade control structure (CSB), which uses stage 19 as the temperature-sensitive stage in the second column, exhibits better controllability than the CSA, which uses stage 4 as the temperature-sensitive stage. Three cases of partial heat integration are studied, and the first case, which uses an auxiliary condenser, is the most economic. The dynamic control strategies of the first and second cases handle ±10% feed disturbances well; however, the CSE can attain good controllability when ±20% feed disturbances are introduced. For the fully heat-integrated TCPSD process, the CSG exhibits good controllability for ±20% feed disturbances. The time that the control structures require to reach new steady states varies greatly for different heat-integrated processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat Integration and Control of a Triple-Column Pressure-Swing Distillation Process

Zhu

Jia

et al. 2017

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…HP-ADWC is a highly integrated and multivariable interacting process, so it is challenging to develop effective control structures. Articles about dynamic research on HP and ADWC processes are increasing, − but there are few about the HP-ADWC process. Only in 2016, Luyben proposed an effective control structure of HP-ADWC based on Li et al in the separation of a minimum-boiling tertiary butanol/water azeotropic system by Aspen Dynamics for the first time.…”

Section: Introductionmentioning

confidence: 99%

Design and Control of a Heat Pump-Assisted Azeotropic Dividing Wall Column for EDA/Water Separation

Chen

Cong

et al. 2017

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A novel heat pump-assisted azeotropic dividing wall column (HP-ADWC) has been proposed for the separation of a maximum-boiling ethylenediamine (EDA)/water system in this paper. Compared with conventional azeotropic distillation (CAD), HP-ADWC allows 42.93% energy savings and 24.36% total annual cost (TAC) savings if the payback period is assumed to be 8 years. To achieve the energy and economic benefits, this novel design must be controllable. However, it is challenging to control this complex and highly integrated HP-ADWC process since there are more interactive variables and fewer degrees of freedom than classic DWC process. In this paper, the dynamic controllability of HP-ADWC is studied by Aspen Dynamics and an effective control structure named CS4 is proposed, which works pretty well for the disturbances in both feed rate and feed composition.

show abstract

Multiple transesterifications in a reactive dividing wall column integrated with a heat pump

Lee

Jang

Lee

2019

Korean J. Chem. Eng.

View full text Add to dashboard Cite

Controllability of separate heat pump distillation for separating isopropanol-chlorobenzene mixture

Cited by 9 publications

References 35 publications

Heat Integration and Control of a Triple-Column Pressure-Swing Distillation Process

Heat Integration and Control of a Triple-Column Pressure-Swing Distillation Process

Design and Control of a Heat Pump-Assisted Azeotropic Dividing Wall Column for EDA/Water Separation

Multiple transesterifications in a reactive dividing wall column integrated with a heat pump

Contact Info

Product

Resources

About