Heuristic approach for the synthesis of heat-integrated distillation sequences

Aly, S.E.

doi:10.1002/(sici)1099-114x(199711)21:14<1297::aid-er327>3.0.co;2-1

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…Previous researches suggested using a feasible heat exchange matrix based on a minimum temperature difference restriction. − ,, In this research, the minimum temperature difference is not used to restrict feasible matches, and the matches are possible as long as temperature of a hot stream is larger than that of a cold stream. However, the cost of a heat exchanger becomes more expensive as the temperature difference decreases.…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…The effective reduction of a search domain, however, greatly depends on the user's knowledge. Aly 3 proposed an approach based on several heuristic rules generating feasible matches between process streams for heat integration in predetermined distillation sequences with sharp or sloppy splits. The necessary pressure difference between columns to generate heat exchange was estimated in advance as a function of the condenser temperature.…”

Section: Introductionmentioning

confidence: 99%

“…In these approaches − only sequences consisting of conventional columns were treated, and the total annual cost ( TAC ) was adopted as the objective function. Sequences of conventional columns exhibit thermodynamic irreversibility owing to the mixing of streams at some stages in the column .…”

Section: Introductionmentioning

confidence: 99%

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Multiobjective Optimization for Synthesizing Compressor-Aided Distillation Sequences with Heat Integration

Alcántara-Ávila

Kano

Hasebe

2012

Ind. Eng. Chem. Res.

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Various column structures, configurations, and energy conservation methods have been proposed to reduce the cost and energy consumption in distillation sequences, such as thermally coupling or heat integration. In this work, a synthesis method of optimal separation sequences including thermally coupled columns is proposed. In the proposed method, vapor recompression of the flow to the condenser and pressure change within thermally coupled columns are taken into account to increase the possibility of heat integration. Furthermore, the energy requirement (ER) was adopted as the objective function as well as the total annual cost (TAC). By solving the multiobjective optimization problem, the relationship between the required annual cost and the amount of energy can be explicitly evaluated, i.e., the necessary cost increase per unit of energy input to the sequence can easily be assessed. A superstructure approach was adopted to enumerate all the candidate distillation sequences which consisted of conventional and thermally coupled columns. Rigorous simulations of each column were effectively used to assign reliable data to the optimization stage. Then, the process synthesis problem was formulated as a mixed integer linear programming (MILP) problem whose objective is to minimize TAC and ER. For two case study problems, Pareto-optimal solutions have been derived. The results of two case studies indicated that nonconventional sequences became the optimal for both cases. Vapor recompression was effective for minimizing the energy requirement.

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Section: Mathematical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multiobjective Optimization for Synthesizing Compressor-Aided Distillation Sequences with Heat Integration

Alcántara-Ávila

Kano

Hasebe

2012

Ind. Eng. Chem. Res.

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“…Methods for multi-component separation are widely utilized in the petroleum refining sector. The choice of the suitable method and the best sequence are the challenge in the processes of multi-component separation [1].…”

Section: Introductionmentioning

confidence: 99%

Systematic Approach For Sharp Separation Network

ahmed,

Aly,

Awad

2023

Journal of Petroleum and Mining Engineering

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Distillation is one of the main separating methods which is used frequently in the industrial field. For separating a multi-component feed mixture using distillation process, the sequence of distillation columns is so important, but unfortunately it is really hard to find the best sequence due to the large number of possibilities. This work developed a multiobject approach for the synthesis of the sharp separation network which is used to separate a large number of components in a mixture that was difficult to separate because it was difficult to select the appropriate separation sequence from the extensive number of potential splits. The use of three expert rules to qualify the estimated mass load, the difference in boiling point, and the relative volatility forms the basis of the synthesis algorithm. There are two fuzzy analogical gates in use (symmetric and asymmetric). The normalized predicted mass load and the normalized relative volatility are the inputs for the symmetric gate (AND gate). The output of the AND gate and the normalization of the boiling point difference are the inputs for the asymmetric gate (INVOKE gate). for separation issues with many components, the size is huge and the amount of decision variables is enormous. This approach not only can be used to find the optimum separation sequence but also can be used with a huge number of components which was so difficult to find their best separation sequence. Also, it has been noticed that the developed approach gave a lower total annual cost compared with any other methods. So, the suggested method can be carried out manually and is easy to use for a large number of components. Several illustrative examples using existing fuzzy analogical gate are provided as examples of the suggested method's success.

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“…Figure 3 demonstrates the main parts of heat integration for efficient energy use and emission reduction. It starts from the thermodynamic analysis of process streams and the application of Pinch technology [10] that was later extended to utility efficiency [11] and distribution [12], as well as the integration of distillation columns, reboilers, and reflux condensers [13]. Besides, the heat flows in the distillation column were additionally analyzed to identify horizontal heat transfer to get energy benefits [14].…”

Section: Introductionmentioning

confidence: 99%

Achievements and Perspectives of Process Integration in Cis Countries

Boldyryev¹

2020

REFFIT

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Due to the rapid growth in the world population, there has been an increase in energy consumption globally. The problem of efficient energy use becomes more relevant and stimulates research and development of new energy and resource-saving technologies. This task is becoming more complicated when the other factors are accounted for, resulting in multiple-factor trade-offs, such as the water-energy-food nexus. This paper highlights the main points for the development of Process Integration in the Commonwealth of Independent States (CIS) countries. It shows the main achievements in the field to date and demonstrates the scientific schools that are working on these problems. A comprehensive review of modern approaches and methods, which are now being developed or have been recently developed, was done. It shows a research gap in Process Integration in CIS and other leading countries. It demonstrates the significant research potential as well as practical applications. The main challenges in process systems engineering and for the sustainable development of industrial energy systems are also discussed. Industry digital transformation, energy transition, circular economy, and stronger energy and water integration are pointed out as priorities in analysis, design, and retrofit of society in the future. A state-of-the-art review in the area of integration of continuous and batch processes, mass integration technologies, and process intensification is presented to show the variety of existing approaches. The necessity of Process Integration development in the CIS is shown to be a necessary condition for building a more sustainable society and a resource-efficient economy.

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Heuristic approach for the synthesis of heat-integrated distillation sequences

Cited by 8 publications

References 16 publications

Multiobjective Optimization for Synthesizing Compressor-Aided Distillation Sequences with Heat Integration

Multiobjective Optimization for Synthesizing Compressor-Aided Distillation Sequences with Heat Integration

Systematic Approach For Sharp Separation Network

Achievements and Perspectives of Process Integration in Cis Countries

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