The activity loss modeling of catalytic reactor of sulfur recovery unit in South Pars Gas Complex (SPGC) 3rd refinery based on percolation theory

Khatami, A. I.; Heidari, Yashar; Safadoost, Alireza; Aleghafouri, Abbas; Davoudi, Mehdi

doi:10.1016/j.jngse.2015.08.059

Cited by 12 publications

(4 citation statements)

References 31 publications

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“…The general material balance equation is as follows: (7) In the case of steady-state conditions, no accumulation exists, the equation is written as: (8)…”

Section: Software Program Solving Equations 271 Materials Balance Equationsmentioning

confidence: 99%

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Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant

2021

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Process sour water produced from refinery contains some hazardous pollutants as (H2S and NH3). Sour water stripper units remove both compounds from water. The two stripped pollutants are sent to Sulphur recovery unit to produce Sulphur and prevent any acidic emissions against environmental regulations. The sour water stripper unit serving the delayed Coker unit was simulated with Aspen HYSYS V.11 and an exergy study was conducted on different equipment. While energy is transformed from a form to another, exergy is destructed in an irreversible process. The total exergy is equal to physical and chemical exergies. Physical exergy is calculated through HYSYS and chemical exergy is calculated through a series of equations embedded in excel. The exergy destruction rates, the destruction efficiency and the percentage share of the destruction of each equipment was calculated. The total unit destruction rate was 2996.25 kW. The stripper showed the highest destruction rate 2592.23 kW and a percentage share of 86.52 % of total destruction. The overall efficiency of exergy is 81.58%. 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 total destruction. The pumps showed the lowest destruction rates with values of less than 1% of the total destruction of each unit.

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“…The general material balance equation is as follows: (7) In the case of steady-state conditions, no accumulation exists, the equation is written as: (8)…”

Section: Software Program Solving Equations 271 Materials Balance Equationsmentioning

confidence: 99%

“…Hydrogen Sulphide is a hazardous toxic, corrosive pollutant produced by the refinery industry. It produces acid rain causing severe damages to equipment and also for human health [7,8]. Hydrogen Sulphide is used as feed to sulphur recovery plants (SRU) to produce elemental Sulphur [9,10].…”

Section: Introductionmentioning

confidence: 99%

Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant

2021

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“…The hydrogen sulfide produced in the refinery industry is considered a hazardous pollutant and is toxic, corrosive, and acidic in nature. It causes severe damage to equipment as a result of its corrosiveness and may cause human death [1,2]. Sulfur recovery unit (SRU) plants recover elemental sulfur from harmful H 2 S [3,4] to prevent any acidic gas emissions from violating environmental regulations [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Ibrahim

Ashour

Gadalla

2021

Heliyon

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Refinery plants use diethanolamine (DEA) solutions for gas sweetening. The role of DEA is to absorb H 2 S from sour gas. Amine Regeneration Units (ARU) are used to regenerate the rich Amine with H 2 S from refinery units to Lean Amine. An ARU unit of a Middle Eastern refinery that began official production in 2020 was simulated using Aspen HYSYS V.11, and an exergy study was conducted on different equipment. Whereas energy is transformed from one form to another, the exergy is destroyed in an irreversible process. The total exergy was equal to the physical and chemical exergy. The physical exergy was calculated using HYSYS, and the chemical exergy was calculated using a series of equations embedded in Excel. The DEA concentration used was 25 wt%. The exergy destruction rates, destruction efficiency, and percentage share of destruction of each piece of equipment were calculated. The regenerator exhibited the highest destruction rate of 13459.73 kW, and a percentage share of 79.61% of the total destruction. The overall exergy efficiency was 99.7%. The DEA concentration decreased from 25% to 20% as a result of system losses during start-up. Therefore, a case study was conducted to test the effect of this decrease in the H 2 S concentration in the sweet gas, and no effect was observed. An exergy study was conducted using an DEA of 20%. The distribution of the equipment destruction did not change. The total destruction loss increased by 2057.08 kW. From the exergy and operation point of view, the best scenario was to use a 25% concentration, to prevent destruction losses and operation problems.

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“…Hydrogen sulphide is a hazardous toxic, corrosive pollutant produced from refinery industry. It produces acid rain causing severe damages to equipment and also for human health [1,2]. Hydrogen sulphide is used as feed to sulphur recovery plants (SRU) to produce elemental sulphur [3,4].…”

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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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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The activity loss modeling of catalytic reactor of sulfur recovery unit in South Pars Gas Complex (SPGC) 3rd refinery based on percolation theory

Cited by 12 publications

References 31 publications

Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant

Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

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

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