Development of a Dynamic Modeling Approach to Simulate a Segmented Distillation Column for Flexible Operation

Bruns, Bastian; Fasel, Henrik; Grünewald, Marcus; Riese, Julia

doi:10.3390/chemengineering5040066

Cited by 7 publications

(12 citation statements)

References 40 publications

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“…As single segments of this new tray design can be operated individually, these segments can be started‐up or shut‐down to widen or shorten the operating window as needed. Moreover, previous simulative studies by Bruns et al [ 3 ] have shown, that by transferring liquid from an active segment to an adjacent segment, the start‐up time can be reduced significantly, leading to shorter response times during operation. For this new tray design two types of operation were defined.…”

Section: Discussionmentioning

confidence: 99%

“…Transferring liquid from a segment operating at steady‐state conditions to an adjacent segment to be started‐up accelerates the formation of temperature and concentration profiles during start‐up operation. Previous simulation studies performed by Bruns et al [ 3 ] have shown that by transferring liquid phase on every tray from the segment operated at steady‐state to the adjacent started‐up segment, start‐up times can be reduced by up to 90%. This in turn leads to faster response times during flexible operation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the lower operation limit and the gain of flexibility of an innovative segmented tray column

Fasel

Grünewald

Riese

2022

J Adv Manuf & Process

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Operating windows of conventional tray columns may not be large enough to ensure a sufficient separation with the current or future challenges of a volatile energy and raw material supply. Therefore, an innovative, segmented separation tray has been developed, which enlarges the operation window and thus leads to a higher flexibility, managing the challenges of higher volatility in downstream processes. In this contribution, a hydrodynamic characterization and the resulting lower operation limits of this segmented tray are presented.Furthermore, an approach to obtain shorter start-up times for the column and a resulting faster response time to changes in the process are presented. The feasibility of this type of operation is evaluated by the investigation of the stability of the tray under new operation conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the lower operation limit and the gain of flexibility of an innovative segmented tray column

Fasel

Grünewald

Riese

2022

J Adv Manuf & Process

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“…Nevertheless, the installation of buffer tanks can help to reduce the loss of valuable material. Further measures described by Riese et al are aiming at an internal structuring of the column to enhance capacity flexibility 113 and reduce start‐up times 114 . The internal segmentation of the column enables the independent operation of singular segments and, due to the proposed column design, 115 a start‐up of adjacent segments by pre‐defined concentration and temperature profiles.…”

Section: Literature Review On Dsm Options In Biofuel Production Plantsmentioning

confidence: 99%

“…Further measures described by Riese et al are aiming at an internal structuring of the column to enhance capacity flexibility 113 and reduce start-up times. 114 The internal segmentation of the column enables the independent operation of singular segments and, due to the proposed column design, 115 a start-up of adjacent segments by pre-defined concentration and temperature profiles. This design approach leads to an increase in FOL from 50% to 120% and a reduction of start-up time of >90%.…”

Section: Distillationmentioning

confidence: 99%

Options for demand side management in biofuel production: A systematic review

Röder

Gröngröft

Grünewald

et al. 2022

Intl J of Energy Research

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Summary To minimize the emissions from the production of biofuels, one aim is to reduce or completely replace the amount of fossil fuels used for internal process energy. A conceivable solution is the use of volatile renewable energy sources such as solar and wind. The fluctuation of these energy sources in their production inevitably leads to a transformation to flexible power consumption, commonly referred to as demand side management (DSM). In current research, a wide range of processes has been identified to be suitable for DSM application. Although biorefineries have not yet been tested for DSM application, it is noteworthy that many of the DSM suitable processes are employed in biofuel plants. Thus, this contribution offers a comprehensive overview of DSM options drawn from literature with a special focus on process steps, which have been analysed for operational and capacity flexibility and which are found in or are transferable to biorefinery systems. By identifying process steps in biofuel production that can be operated flexibly, this extensive literature study helps to find technical restrictions limiting the overall process flexibility. The scope of this contribution is to create an overview of which processes in biofuel production can be considered for DSM use.

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“…The modeling and control of a distillation column in a petroleum process are presented in [ 3 ]. The simulation of a segmented distillation column in flexible operation considering dynamic modeling is developed in [ 4 ]. The modeling and simulation of a batch reactive distillation column with optimization effects are proposed in [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of an Energy Integrated Distillation Column in a Bond Graph Approach

Mendez-B

González-A

Gallegos

et al. 2022

Entropy

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The bond graph methodology for modelling an integrated energy distillation column is applied in this paper. The distillation column is built by five trays for a binary mixture. However, due to its modular construction in a bond graph, the number of trays can be increased. In order to link the analysis tools of systems modeled in the bond graph to the mathematical model given to a distillation column, a junction structure of the proposed bond graph is presented. Hence, this junction structure is a way to obtain the state space representation of the modeled column in bond graphs. Likewise, it is well known that distillation columns determine a class of nonlinear systems, so throughout this paper, these systems in a bond graph approach can be analyzed. In order to learn the behavior of the distillation column in the physical domain, simulation results using 20-Sim software are shown. In addition, with the simulation of two case studies consisting of two mixtures with different relative volatilities, the versatility of the column model in a bond graph is presented. In both cases, the increase in the feed flow, the mole fraction of the light component in the feed or the distillate reflux that enriches the concentration of light in the column determine an increase in the mole fraction of light in the distillate and in the bottom reflow. Further, the control design for a distillation column in the physical domain can be extended.

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Development of a Dynamic Modeling Approach to Simulate a Segmented Distillation Column for Flexible Operation

Cited by 7 publications

References 40 publications

On the lower operation limit and the gain of flexibility of an innovative segmented tray column

On the lower operation limit and the gain of flexibility of an innovative segmented tray column

Options for demand side management in biofuel production: A systematic review

Modeling and Simulation of an Energy Integrated Distillation Column in a Bond Graph Approach

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