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Chemical plant flare minimization via plantwide dynamic simulation / Qiang Xu in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3505–3512 Titre : Chemical plant flare minimization via plantwide dynamic simulation Type de document : texte imprimé Auteurs : Qiang Xu, Auteur ; Xiongtao Yang, Auteur ; Chaowei Liu, Auteur Année de publication : 2009 Article en page(s) : pp. 3505–3512 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Flare  minimization  Plant  start-up  operations  Plantwide  dynamic  simulation Résumé : Flaring is crucial to chemical plant safety. However, excessive flaring, especially the intensive flaring during the chemical plant start-up operation, emits huge amounts of volatile organic compounds (VOCs) and highly reactive VOCs, which meanwhile results in tremendous industrial material and energy loss. Thus, the flare emission should be minimized if at all possible. This paper presents a general methodology on flare minimization for chemical plant start-up operations via plantwide dynamic simulation. The methodology starts with setup and validation of plantwide steady-state and dynamic simulation models. The validated dynamic model is then systematically transformed to the initial state of start-up and thereafter virtually run to check the plant start-up procedures. Any infeasible or risky scenarios will be fed back to plant engineers for operation improvement. The plantwide dynamic simulation provides an insight into process dynamic behaviors, which is crucial for the plant to minimize the flaring while maintaining operational feasibility and safety. The efficacy of the developed methodology has been demonstrated by a real start-up test. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8016219 [article] Chemical plant flare minimization via plantwide dynamic simulation [texte imprimé] / Qiang Xu, Auteur ; Xiongtao Yang, Auteur ; Chaowei Liu, Auteur . - 2009 . - pp. 3505–3512. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3505–3512 Mots-clés : Flare  minimization  Plant  start-up  operations  Plantwide  dynamic  simulation Résumé : Flaring is crucial to chemical plant safety. However, excessive flaring, especially the intensive flaring during the chemical plant start-up operation, emits huge amounts of volatile organic compounds (VOCs) and highly reactive VOCs, which meanwhile results in tremendous industrial material and energy loss. Thus, the flare emission should be minimized if at all possible. This paper presents a general methodology on flare minimization for chemical plant start-up operations via plantwide dynamic simulation. The methodology starts with setup and validation of plantwide steady-state and dynamic simulation models. The validated dynamic model is then systematically transformed to the initial state of start-up and thereafter virtually run to check the plant start-up procedures. Any infeasible or risky scenarios will be fed back to plant engineers for operation improvement. The plantwide dynamic simulation provides an insight into process dynamic behaviors, which is crucial for the plant to minimize the flaring while maintaining operational feasibility and safety. The efficacy of the developed methodology has been demonstrated by a real start-up test. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8016219

Dynamic simulation and optimization for the start - up operation of an ethylene oxide plant / Xiongtao Yang in Industrial & engineering chemistry research, Vol. 49 N° 9 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 9 (Mai 2010) . - pp. 4360–4371 Titre : Dynamic simulation and optimization for the start - up operation of an ethylene oxide plant Type de document : texte imprimé Auteurs : Xiongtao Yang, Auteur ; Qiang Xu, Auteur ; Kuyen Li, Auteur Année de publication : 2010 Article en page(s) : pp. 4360–4371 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ethylene  Oxide Résumé : Ethylene oxide (EO) is an important chemical intermediate for the production of various chemical products. The manufacturing of EO involves critical exothermic reactions at high temperature and high pressure, whose failure may cause catastrophic personal injury, severe air pollution, and tremendous economic loss. Thus, an EO plant must be well controlled under various situations, especially during its start-up operations. In this paper, a general methodology for improving chemical plant start-up operations through plant-wide dynamic simulation has been developed. It undergoes modeling and validations for steady-state, dynamic, and historian start-up operations. On the basis of the validated dynamic simulation model, the original plant start-up strategy is further examined and optimized to speed-up the plant start-up operation with enhanced safety considerations. A case study on an EO plant start-up has demonstrated the significant operational and economic benefits of the proposed methodology. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9019038 [article] Dynamic simulation and optimization for the start - up operation of an ethylene oxide plant [texte imprimé] / Xiongtao Yang, Auteur ; Qiang Xu, Auteur ; Kuyen Li, Auteur . - 2010 . - pp. 4360–4371. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 9 (Mai 2010) . - pp. 4360–4371 Mots-clés : Ethylene  Oxide Résumé : Ethylene oxide (EO) is an important chemical intermediate for the production of various chemical products. The manufacturing of EO involves critical exothermic reactions at high temperature and high pressure, whose failure may cause catastrophic personal injury, severe air pollution, and tremendous economic loss. Thus, an EO plant must be well controlled under various situations, especially during its start-up operations. In this paper, a general methodology for improving chemical plant start-up operations through plant-wide dynamic simulation has been developed. It undergoes modeling and validations for steady-state, dynamic, and historian start-up operations. On the basis of the validated dynamic simulation model, the original plant start-up strategy is further examined and optimized to speed-up the plant start-up operation with enhanced safety considerations. A case study on an EO plant start-up has demonstrated the significant operational and economic benefits of the proposed methodology. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9019038

Pressure-driven dynamic simulation for improving the performance of a multistage compression system during plant startup / Xiongtao Yang in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. Titre : Pressure-driven dynamic simulation for improving the performance of a multistage compression system during plant startup Type de document : texte imprimé Auteurs : Xiongtao Yang, Auteur ; Qiang Xu, Auteur ; Chuanyu Zhao, Auteur Année de publication : 2010 Article en page(s) : pp. Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Multistage  compression  systems  Pressure-driven  dynamic  simulations  Plant  startup Résumé : Multistage compression systems (MSCS) are the most important and valuable facilities in chemical plants, whose failure may cause severe accidents and/or tremendous economic loss. Thus, operation for MSCS needs sufficient care under various situations, especially during plant startup. This paper employs rigorous pressure-driven dynamic simulations to examine and improve operation safety of the cracked gas compression system during an ethylene plant startup. For safety consideration, antisurge process design and control strategies are dynamically evaluated along with startup procedures. Operating point trajectory for each compressor and their potential safety problems are identified. Assisted by the rigorous dynamic simulation, the plant startup procedure is improved with better safety performance. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900212v [article] Pressure-driven dynamic simulation for improving the performance of a multistage compression system during plant startup [texte imprimé] / Xiongtao Yang, Auteur ; Qiang Xu, Auteur ; Chuanyu Zhao, Auteur . - 2010 . - pp. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. Mots-clés : Multistage  compression  systems  Pressure-driven  dynamic  simulations  Plant  startup Résumé : Multistage compression systems (MSCS) are the most important and valuable facilities in chemical plants, whose failure may cause severe accidents and/or tremendous economic loss. Thus, operation for MSCS needs sufficient care under various situations, especially during plant startup. This paper employs rigorous pressure-driven dynamic simulations to examine and improve operation safety of the cracked gas compression system during an ethylene plant startup. For safety consideration, antisurge process design and control strategies are dynamically evaluated along with startup procedures. Operating point trajectory for each compressor and their potential safety problems are identified. Assisted by the rigorous dynamic simulation, the plant startup procedure is improved with better safety performance. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900212v