A new retrofit approach to the absorption-stabilization process for improving energy efficiency in refineries

Liu, X.G.; He, Chang; Chen, J.J.; Zhang, B.J.; Chen, Q.L.

doi:10.1016/j.energy.2016.10.128

Cited by 12 publications

(9 citation statements)

References 31 publications

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“…The tray data, specification, and variable parameters of columns are given in Table S2 . 1 , 4 The mass balance of practical operation and simulation are given in Table 2 . The main parameters are compared in Table S3 .…”

Section: Resultsmentioning

confidence: 99%

“…It is desirable but challenging to intensify and simplify this complex process. Many studies have focused on process intensification and simplification for a better economic, environmental, and energy efficiency performance. , Liu et al proposed a new absorption–stabilization process with a two-stage condensation to improve energy performance. In the new process, a condenser, a condensed oil tank, and a side reboiler were integrated into the original process and then a heat integration scheme.…”

Section: Introductionmentioning

confidence: 99%

“…As the core operation in crude oil refining with high energy consumption, new GASPs are usually proposed to improve the energy performance by process innovation and operating parameter optimization. , Rare publications address intensification and improvement of GASPs for better energy efficiency by using the advanced exergy analysis. Furthermore, the advanced exergy analysis can identify the improved potential of each component and the interaction among components of the petroleum-based chemical processes compared with the conventional exergy analysis. ,− The energy utilization bottlenecks of the conventional and new processes and energy-saving potentials of components may be different.…”

Section: Introductionmentioning

confidence: 99%

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Advanced Exergy Analysis for a Novel Gasoline Absorption–Stabilization Process

et al. 2021

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The advanced exergy analysis can identify the improved potential of each component and the interaction among components of the refining processes. In this work, a new gasoline absorption–stabilization process (GASP) is proposed for better energy utilization considering the absorption process intensification, which can be further explained using exergy analysis. Both conventional and new GASPs are simulated in PRO/II, which are verified with the actual plant operation data. The energy performance of both conventional and new GASPs is evaluated through the advanced exergy analysis. The exergy efficiencies of conventional and new GASPs are 65.04 and 71.44%, respectively. In addition, the total exergy destruction rates are 7.79 and 6.01 MW, respectively. The total exergy destructions of 46.37 and 40.73% can be reduced, respectively. Though the stabilizer has the largest exergy destruction in both the processes, the air cooler for the rich gas in the new GASP has the largest potential for reducing exergy destruction, which is different from the conventional GASP. Furthermore, a sensitivity analysis of the new GASP is performed to study the effects of newly added operation and design parameters on the conventional and advanced exergy analyses of the absorber.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Advanced Exergy Analysis for a Novel Gasoline Absorption–Stabilization Process

et al. 2021

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“…The thermodynamic model like an equation of state (EOS) is required for VLE calculation. Among the many cubic EOS of Van der Waals type currently available, the equation proposed by Peng and Robinson (PR) is widely used due to its simplicity and flexibility, for hydrocarbons fractions [12], [13]. For extending PR EOS to mixtures, it is necessary to include composition.…”

Section: B Model and Validationmentioning

confidence: 99%

Energy Efficiency Improvement of Debutanizer Column, for NGL Separation

Brahim¹,

Abderafi²

2021

IJESD

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Compared to other petroleum, the natural gas combustion remains the cleanest and the one showing less CO2 emission. These reasons make the natural gas combustion one of the important issues to study. The separation of NGL is energy intensive. This operation is performed through a series of column including the debutanizer column. The present work is devoted to optimize the energy consumption at the level of the debutanizer column. The response surface technique and deploying a central composite numerical design is followed makes use of available data from a refinery. Using a multiple linear regressions, the optimization method leads us to three reliable models. Each of the three models takes as input the reflux ratio and the head pressure in order to predict the condenser heat duty, the reboiler heat duty and the purity of the produced butane. Suggested mathematical models were validated and their reliability was assessed via a set of statistical analyses. The optimization aims to simultaneously minimize the energy consumption of the condenser and reboiler, and maximize the purity of the ejected Butane. This optimization step allowed us to define the optimal values of reflux ratio and head pressure, with desirability function equal to 99 %. Under the determined optimal values, operating energy and cost of the industrial process were reduced by 38 % and 37 %, respectively, and besides, a high purity of butane was noticed reaching 99 %. From an economic point of view, separation NGL with optimal values of pressure and reflux ratio, may contribute to a decrease of CO2 emission and increases the energy efficiency.

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“…This factor, coupled with the need to respond to an increasingly competitive global market and the obligation to respond to environmental compliance, increased the concern of the petrochemical industry towards increasing energy efficiency [2]. This recent concern lead to some studies concentrating on the recovery of flare gas energy [3,4], on the adequate use of waste heat through organic Rankine cycles [5] and through the retrofitting of some refinery processes to improve the energy efficiency in oil refineries [6].…”

Section: Introduction -The Energy In the Petrochemical Industrymentioning

confidence: 99%

Energy and Exergy Analysis of a Pre-distillation Unit

Vilarinho

Campos

Pinho

2017

International Journal of Thermodynamics

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Energy and exergy balances were evaluated for the pre-distillation unit (Un-0100) of an aromatics plant from a Portuguese refinery. The main objective of the study was to find out the relevant thermal energy losses in order to implement energy recovery procedures, without questioning the operating processes of the plant. In its overall analysis, the Un-100 obtained an energy efficiency of 13.4% and an exergy efficiency of 2.3%. The equipment that has higher energy losses in this unit is the air coolers, representing 59.9% of the energy losses, i.e., most of the energy lost in this unit is due to the cooling process. The irreversibility observed in these equipment groups was 11.2%. Moreover, the furnace represents 15.6% of energy losses, but this component stands out in the irreversibility analysis, with 56.3% of the total. Based on these values, it can be said that this equipment presents a high potential of improvement of its energy and exergy performance. These results, concern a small part of a more general case study about the performance of the aromatics plant, and clearly show the need to establish complementary energy and exergy balances in order to increase the energetic performance of the unit.

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A new retrofit approach to the absorption-stabilization process for improving energy efficiency in refineries

Cited by 12 publications

References 31 publications

Advanced Exergy Analysis for a Novel Gasoline Absorption–Stabilization Process

Advanced Exergy Analysis for a Novel Gasoline Absorption–Stabilization Process

Energy Efficiency Improvement of Debutanizer Column, for NGL Separation

Energy and Exergy Analysis of a Pre-distillation Unit

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