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https://doi.org/10.13044/j.sdewes.d6.0241

Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control

Hellen P. M. C. Morado ; Hydrorefining and Treatment Processes, Petrobras, Av. República do Chile, nº 65 – Centro, Rio de Janeiro, Brazil
José L. de Medeiros ; School of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149 – Cidade Universitária, Rio de Janeiro, Brazil
Ofélia de Q. F. Araújo ; School of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149 – Cidade Universitária, Rio de Janeiro, Brazil

Puni tekst: engleski, pdf (3 MB) str. 305-324 preuzimanja: 227* citiraj
APA 6th Edition
Morado, H.P.M.C., de Medeiros, J.L. i Araújo, O.d.Q.F. (2019). Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control. Journal of Sustainable Development of Energy, Water and Environment Systems, 7 (2), 305-324. https://doi.org/10.13044/j.sdewes.d6.0241
MLA 8th Edition
Morado, Hellen P. M. C., et al. "Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control." Journal of Sustainable Development of Energy, Water and Environment Systems, vol. 7, br. 2, 2019, str. 305-324. https://doi.org/10.13044/j.sdewes.d6.0241. Citirano 04.08.2021.
Chicago 17th Edition
Morado, Hellen P. M. C., José L. de Medeiros i Ofélia de Q. F. Araújo. "Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control." Journal of Sustainable Development of Energy, Water and Environment Systems 7, br. 2 (2019): 305-324. https://doi.org/10.13044/j.sdewes.d6.0241
Harvard
Morado, H.P.M.C., de Medeiros, J.L., i Araújo, O.d.Q.F. (2019). 'Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control', Journal of Sustainable Development of Energy, Water and Environment Systems, 7(2), str. 305-324. https://doi.org/10.13044/j.sdewes.d6.0241
Vancouver
Morado HPMC, de Medeiros JL, Araújo OdQF. Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control. Journal of Sustainable Development of Energy, Water and Environment Systems [Internet]. 2019 [pristupljeno 04.08.2021.];7(2):305-324. https://doi.org/10.13044/j.sdewes.d6.0241
IEEE
H.P.M.C. Morado, J.L. de Medeiros i O.d.Q.F. Araújo, "Emission Minimization of a Two-Stage Sour Water Stripping Unit Using Surrogate Models for Improving Heat Duty Control", Journal of Sustainable Development of Energy, Water and Environment Systems, vol.7, br. 2, str. 305-324, 2019. [Online]. https://doi.org/10.13044/j.sdewes.d6.0241

Sažetak
Sour water are aqueous waste streams from oil refining operations, heavily contaminated with hydrogen sulfide and ammonia, which need to be stripped before reuse or disposal, avoiding damages to process and environment. Two-stage sour water stripper units are the most common technology to treat sour water for hydrogen sulfide and ammonia
separation to produce reusable water and send these species respectively to Claus and ammonia plants. The first stage of a two-stage sour water unit is responsible for properly splitting hydrogen sulfide and ammonia. This work uses surrogate models to predict the limiting point of hydrogen sulfide separation in the first stage of a sour water unit,
allowing more efficient heat duty control strategies to achieve the difficult split of hydrogen sulfide and ammonia and simultaneously lowering heat consumption. Failure of compliance to this limit results in unspecified stripped gas from the first stage, impeding it to directed to Claus plant, entailing loss of sulfur production and higher load of pollutant emissions from flared gases. Therefore, a precise surrogate predictor was developed to dynamically define a quasi-optimum set-point to the controller of the first stage reboiler duty based on dynamic disturbances – the first stage input factors to the surrogate model, such as hydrogen sulfide and ammonia contents of the sour water. The new control policy outperformed the traditional first stage ratio control in terms of stripped gas composition and plant stability.

Ključne riječi
Sour water stripping; Surrogate model; Hydrogen sulfide-ammonia split; Sulfur block; Dynamic simulation.

Hrčak ID: 220562

URI
https://hrcak.srce.hr/220562

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