Flexibility analysis of an ethylene plant

Petracci, Noemí Cristina; Hoch, Patricia M.; Eliceche, Ana M.

doi:10.1016/0098-1354(96)00084-1

Cited by 9 publications

(8 citation statements)

References 4 publications

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“…Then, Eliceche et al focused on the optimal operation of the plant at variable feed conditions considering the variable feed flow rate and ethane composition. Petracci et al, extended the work in ref by analyzing the flexibility of the plant against unknown variations of flow rate and ethane composition in the feed stream. The maximum perturbations that are imposed on the plant were evaluated by solving a NLP problem.…”

Section: Optimal Designmentioning

confidence: 99%

Thermal Cracking of Hydrocarbons for the Production of Light Olefins; A Review on Optimal Process Design, Operation, and Control

Fakhroleslam

Sadrameli

2020

Ind. Eng. Chem. Res.

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Olefins production plants are large-scale plants, in most of which gaseous and liquid hydrocarbons are cracked to produce light olefins. The complex and large-scale nature of these plants makes it an utmost necessity to design and operate them with the use of computer-aided optimization and control methods. This review paper provides an overview of the reported research works on the optimization and control of different parts of olefin plants. The main research studies are discussed in two main sections: Optimal Design and Process Operation and Control. In the Optimal Design section, the state of the optimal design of cracking furnace systems, cold-end separation systems, and separation columns have been studied. Then in the Process Operation and Control section, the control of cracking furnaces, the control of cold-end separation systems, real-time optimization of olefin plants, cyclic scheduling of cracking furnace systems, production planning of olefin plants, and finally, start-up and shutdown operations in these plants have been extensively reviewed. This paper is a continuation of the three review articles published previously entitled Thermal and Catalytic Cracking of Hydrocarbons for the Production of Light Olefins, the last of which focused on process modeling and simulation.

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Section: Optimal Designmentioning

confidence: 99%

Thermal Cracking of Hydrocarbons for the Production of Light Olefins; A Review on Optimal Process Design, Operation, and Control

Fakhroleslam

Sadrameli

2020

Ind. Eng. Chem. Res.

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“…Unlike the flexibility analysis problems (Grossmann and Floudas, 13 Swaney and Grossmann, 24 Konukman and Akman, 25 Petracci et al, 26 Li and Chang, 27 Adi and Chang 28 ), the goal of flexible synthesis is to provide the optimal design over the uncertain space rather than identify the maximum violation of uncertain constraints for fixed designs. Though the mathematical model eq 9 is established for the optimization target, the equations h and the inequalities g are necessary for the solution, and they are mainly decided by the structure.…”

Section: Synthesis Of Flexible Henmentioning

confidence: 99%

Structure and Area Optimization of Flexible Heat Exchanger Networks

Zhang

et al. 2014

Ind. Eng. Chem. Res.

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A novel method is outlined for flexible heat exchanger network synthesis including nonconvex problems. The presented method is sequentially implemented by two main steps: structure synthesis and area optimization; nevertheless, the optimization of heat exchanger areas can still react on the structure to gain the global optimal solution. The structure is initially synthesized at the nominal operating point and renewed by the topological union with the structure of the critical point and the improved heat transfer loops disconnection strategy. For area optimization, an iterative approach with strong robustness is proposed based on the influences of heat exchanger areas on flexibility index and total annual cost, respectively. The direction matrix method is employed to provide the operational flexibility of the network and the critical operating point. Two examples with nonconvex feasible regions have been studied, and the results well demonstrate the effectiveness of the proposed approach.

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“…• in some cases, the system is operated differently to use another fuel (fuel switching), and this has little to no impact on the process. For instance, a cement kiln can switch from natural gas to flare gas or other industrial by-products [8]; in ethylene production, production plants can typically use several fuels including naphtha or diesel oil [15,27];…”

Section: Introductionmentioning

confidence: 99%

“…in some cases, the system is operated differently to use another fuel (fuel switching), and this has little to no impact on the process. For instance, a cement kiln can switch from natural gas to flare gas or other industrial byproducts (Bosoaga et al, 2009); in ethylene production, production plants can typically use several fuels including naphtha or Diesel oil (Petracci et al, 1996;Han et al, 2020); -in others, the only flexibility is to stop the process and lose some production (load shedding), which means that some orders cannot be fulfilled. For example, in aluminium smelting, any reduction of the current fed into the electrolysis potlines implies a loss of production (Todd et al, 2008); -other flexibility levers can be available, such as load shifting or scheduling, depending on the exact process, with varying degrees of impact on the production and the consumption.…”

Section: Introductionmentioning

confidence: 99%

Embedding reservoirs in industrial models to exploit their flexibility

Cuvelier

2020

SN Appl. Sci.

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In the context of energy transition, industrial plants that heavily rely on electricity face more and more price volatility. To continue operating in these conditions, the directors become continually more willing to increase their flexibility, i.e. their ability to react to price fluctuations. This work proposes an intuitive methodology to mathematically model electro-intensive processes in order to assess their flexibility potential. To this end, we introduce the notion of reservoir, a storage of either material or energy, that allows models based on this paradigm to have interpretations close to the physics of the processes. The design of the reservoir methodology has three distinct goals: (i) to be easy and quick to build by an energy-sector consultant; (ii) to be effortlessly converted into mixed-integer linear or nonlinear programs; (iii) to be straightforward to understand by nontechnical people, thanks to their graphic nature. We apply this methodology to two industrial case studies, namely an induction furnace (linear model) and an industrial cooling installation (nonlinear model), where we can achieve significant cost savings. In both cases, the models can be quickly written using our method and solved by appropriate solver technologies.

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Flexibility analysis of an ethylene plant

Cited by 9 publications

References 4 publications

Thermal Cracking of Hydrocarbons for the Production of Light Olefins; A Review on Optimal Process Design, Operation, and Control

Thermal Cracking of Hydrocarbons for the Production of Light Olefins; A Review on Optimal Process Design, Operation, and Control

Structure and Area Optimization of Flexible Heat Exchanger Networks

Embedding reservoirs in industrial models to exploit their flexibility

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