Exergy study of amine regeneration unit for diethanolamine used in refining gas sweetening: A real start-up plant

Ibrahim, Ahmed Y.; Ashour, Fatma H.; Gadalla, Mamdouh A.; Farouq, Rania

doi:10.1016/j.aej.2021.04.085

Cited by 11 publications

(4 citation statements)

References 28 publications

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“…The study was conducted on two different concentrations (25% and 20%) by weight. A comparison was conducted between the similar equipment of the current study and the previous two studies to conclude the similar relationships between equipment [30,31].…”

Section: Exergy Results Comparison With Aru1 and Mdea Scrubber Studymentioning

confidence: 98%

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Exergy analysis and performance study for sour water stripper units, amine regenerator units and a Sulphur recovery unit of a refining plant

2021

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A refining column in the middle east that started its official production in 2020 provides its sour wastewater from all refinery plants to two sour water units (SWS1 and SWS2) to strip H2S and NH3. Sour gas from the refinery uses a lean amine solution for gas sweetening to absorb H2S in different absorbers. Rich amine with H2S is then stripped in two amine regeneration units (ARU1 and ARU2). The overhead of SWS and ARU units provide the acid gas feed to the sulphur recovery unit (SRU) to produce sulphur and prevent any acidic emissions against environmental regulations. First, the SWS1 unit is simulated using Aspen HYSYS V.11. A complete exergy study is conducted in the unit. Exergy destruction, exergy efficiency and percentage share in the destruction are calculated for all equipment. The highest exergy destruction rate was in the stripper with 5028.58 kW and a percentage share of 81.94% of the total destruction. A comparison was conducted between the exergy results of this study with two other exergy studies performed in the same refinery plant. The columns in the three studies showed the highest destruction rates exceeding 78% of the total destruction of each unit. The air coolers showed the second-highest destruction rates in their units with a percentage share exceeding 7% of the total destruction. The pumps showed the lowest destruction rates with values of less than 1% of the total destruction of each unit. Then, an individual simulation is conducted for stripper1 of SWS1, stripper2 for SWS2, regenerator1 of ARU1 and regenerator2 of ARU2. The individual simulations are combined in one simulation named combined simulation to compute the composition of acid gas from SWS and ARU units feeding SRU. Then, the SRU unit is simulated via a special package in HYSYS V.11 named SULSIM. The computed composition from SWS and ARU is exported to excel where it is linked with SRU simulation to calculate sulphur production. For the first time in any article in the world, all data feeding SWS, ARU, and SRU units are connected to a live system named Process Historian Database (PHD) to gather live data from the plant and perform plant optimization.

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Section: Exergy Results Comparison With Aru1 and Mdea Scrubber Studymentioning

confidence: 98%

“…As a result of system losses during start-up, the DEA concentration dropped from 25 to 20%. Exergy studies were carried out on both concentrations to determine the changes that occurred in the various exergy calculations [30,31]. Also, they conducted an exergy study for an MDEA scrubber unit of an SRU plant.…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis and performance study for sour water stripper units, amine regenerator units and a Sulphur recovery unit of a refining plant

2021

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“…The exergy flow is separated into numerous components, including physical energy, mixing energy (kinetic and potential), and chemical energy [14]. Since kinetic and potential exergy are ignored in this study, the calculation of exergy flow is impacted by physical exergy, which comprises the total of kinetic, potential, and thermal exergy [15].…”

Section: Fig 1 Schematic Diagram Of the Unit 3 In Indramayu Coal Fire...mentioning

confidence: 99%

Thermodynamic Evaluation Based Exergy and Energy Analysis of Existing Indramayu Coal-Fired Power Plants

Yulia,

Wahyuni,

Rizal

et al. 2023

Proceedings of the International Conference on Sustainable Engineering, Infrastructure and Development, ICO-SEID 2022, 23-24 No

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Improvements in industrial processes involve a comprehensive analysis of thermodynamics, specifically the first and second laws, alongside energy and exergy assessments. To address low steam power plant efficiency, each component must undergo a detailed examination to identify and quantify energy and exergy losses. Data from the Indramayu Coal Fired Power Plant informed this evaluation. Results highlight significant exergy destruction in the high-pressure turbine (340 MW) and boiler (320 MW), both operating at less than 20% efficiency. Inefficient heat transfer and insulation contribute to the boiler's exergy destruction. The condenser, responsible for a 50 MW exergy loss, also greatly impacts overall system degradation. Enhancing the steam power plant's thermal efficiency necessitates remedial action, focusing on improving the boiler, high-pressure turbine, and condenser components.

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“…The process of natural gas sweetening is an important step in the technological route of natural gas processing [12,13]. State-of-the-art method of natural gas sweetening is sorption of acid gases with amino-alcohol aqueous solutions [14][15][16]. Despite the widespread use of this method and many years of technology development, it has a number of critical disadvantages [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Natural Gas Sweetening via Membrane-Assisted Gas Absorption. Part 1: A Hollow-Fiber Unit with MDEA-Based Absorbent

Petukhov,

Atlaskin,

Smorodin

et al. 2023

Preprint

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The present study focuses on the development and optimization of a highly efficient unique hybrid technique — membrane-assisted gas absorption (MAGA) in designing the separation unit, which provides the improvement in mass-transfer of a target component during the natural gas processing in terms of sweetening stage. A novel design of membrane-assisted gas absorption cell is used to enhance the ratio between absorbent amount and membrane surface available for permeation. The performance tests were implemented on example of two gas mixtures separation: one is model ternary gas mixture and the second is quasi real natural gas, which includes number of hydrocarbons, nitrogen, acid impurities and xenon. For both cases, the MAGA unit demonstrated high acid gases removal efficiency, and high recovery of hydrocarbons. The ultimate efficiency of studied system was up to 96 and 61 % of removed acid gases with hydrocarbons losses up to 1 % at highest productivity. In this way, the residual sum of acid gases content may be lowered to 1 vol.% using the heat-free hybrid membrane-assisted gas absorption unit maintaining suitable recovery rate of methane, ethane, propane and n-butane. Nevertheless, the overall efficiency of the process may be enhanced using the specific absorption agents with aqueous amino alcohol solutions.

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Exergy study of amine regeneration unit for diethanolamine used in refining gas sweetening: A real start-up plant

Cited by 11 publications

References 28 publications

Exergy analysis and performance study for sour water stripper units, amine regenerator units and a Sulphur recovery unit of a refining plant

Exergy analysis and performance study for sour water stripper units, amine regenerator units and a Sulphur recovery unit of a refining plant

Thermodynamic Evaluation Based Exergy and Energy Analysis of Existing Indramayu Coal-Fired Power Plants

Natural Gas Sweetening via Membrane-Assisted Gas Absorption. Part 1: A Hollow-Fiber Unit with MDEA-Based Absorbent

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