Petrochemical Systems
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Análise estrutural direcionada á redução de espessuras em tubulações industriais. / Structural analyse to thickness reduction in industrial pipings.
In the chemical and petrochemical plants we can notice a big amount and complexity of pipings installeds, it happens due to the need to transfer and process fluids with differents pressures and temperatures and to get the operational requirements of production. A middle size petrochemical plant has among 3,000 to 15,000 tons of carbon steel pipings assembled
Publicado em: 2008
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14. Organização na produção por processos contínuos: prática, conceitos e métodos de projeto para fronteiras móveis interpenetrantes. / Organization in continous processes production: practice, concepts, and method for moving and interpenetrate frontiers.
In the continuous processes is observed a strong participation of the Engineering and the Maintenance at the operation of production systems, at the same time the Operation interacts very intensively with the activities of those two functions. Complex interventions involving all these three functions occur very frequently due to the technological and logisti
Publicado em: 2008
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15. PreparaÃÃo e utilizaÃÃo de uma argila organofÃlica como adsorvente de Fenol
This research had as main objective the attainment of organophilic clay with capacity to promote the separation of phenol, found in effluent the watery ones of petrochemical industries. The experimental procedure objectifying the attainment of the organoclay was initiated by a treatment of natural clay with sodium carbonate. This treatment had as goal to int
Publicado em: 2008
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16. Modelagem e controle de unidades de craqueamento catalitico - FCC / Modeling and control of catalytic cracking units - FCCU
Catalytic cracking is one of the most studied conversion processes due its importance in the petrochemical industry. In this process high weight molecules are broken into lighter ones, yielding more economically valuable products. The study about the process, its mathematical modeling, and its control systems may guarantee the necessary knowledge needed to r
Publicado em: 2007
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17. Rhizospheric microorganisms and arbuscular mycorrhiza in soil from a petrochemical waste landfarming system. / Microbiota RizosfÃrica e Micorriza Arbuscular em Solo de "Landfarming" de ResÃduos PetroquÃmicos.
In the petroleum industrialization a great volume of different toxic residues is generated. Because of these waste environmental hazards they need to be adequately treated before final disposition in the environment. These wastes are usually treated by landfarming systems, but this technique has only relative success, since it doesn t completely remove all c
Publicado em: 2007
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18. Liquid-liquid equilibrium in systems including aromatic hydrocarbons, aliphatic and sulfolane / Equilibrio liquido-liquido em sistemas contendo hidrocarbonetos aromaticos, alifaticos e sulfolano
An important stage within the processes in the petrochemical industry uses the solvent sulfolane in the recovery of high-purity aromatic hydrocarbons. These aromatic compounds are separated from the aliphatic hydrocarbons through solvent extraction, since distillation is not suitable. Experimental data of the multicomponent liquid-liquid equilibrium are esse
Publicado em: 2005
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19. Experimental study and thermodynamic modeling of phase equilibrium (liquid-liquid and liquid-vapor) of systems regarding phenol industry / Estudo Experimental e modelagem termodinamica do equilibrio de fases (liquido-liquido e liquido-vapor) de sistemas de interesse da industria de fenol
Studies concerning physical and chemical phenomena are very important for the chemical industry, form the early stages of design up to full plant operation. Among the many units that make up a chemical plant, the last steps of separation and purification stands as the most expensive. Phenol, used to produce resins as well as other products, is an important f
Publicado em: 2005
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20. Modelagem de redes de transdutores inteligentes utilizando redes de Petri / Modeling of smart transducers nets using petri nets
Devido aos requerimentos temporais nos processos industriais, o objetivo à obter informaÃÃes a cerca do comportamento temporal do sistema de controle (constituÃdo por transdutores inteligentes, barramento de campo e supervisÃo local) de um processo indÃstrial, de modo a garantir o funcionamento correto. Para isso utilizamos a teoria das redes de Petri
Publicado em: 2005
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21. Development of alternative methods to the assessment of the creep fracture resistance of polyethylene resins used for the extrusion of water pipes. / Desenvolvimento de métodos alternativos para a avaliação da resistência à fratura por fluência de resinas de polietileno utilizadas para a extrusão de tubos de água.
Polyethylene has been largely used in potable water distribution systems, mainly in service lines. This polymer offers many advantages over its competitors: flexibility, low cost, ease installation and corrosion resistance. Pipes made with high density polyethylene HDPE, the generic designation of the material in the sanitation industry in Brazil fail
Publicado em: 2005
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22. Improving the power consumption in pneumatic conveying systems by a daptive control of the flow regime
The pneumatic conveying of solids in a gas stream is a recurrent process in petrochemical industries. However, due to practical limitations the majority of existing systems have capacities ranging from 1 to 400 tones per hour over distances less than 1000 m, mainly because of a high power consumption per transported unit mass. More specifically, to avoid the
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
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23. Development of software for data reconciliation of chemical and petrochemical processes / Desenvolvimento de um software para reconciliação de dados de processos quimicos e petroquimicos
The purpose of this work is the development of computational routines for conditioning chemical process data in order to represent the process behavior as reliable as possible. Reliable process description is fundamental for any control or optimization system development, since they respond to the process measurements (its description). Thus, data conditioni
Publicado em: 2003
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24. Modelagem e simulação de processos de separação de misturas gasosas multicomponentes utilizando modulos de membranas de fibra-oca
Separation of gaseous mixtures using membranes is a known operation. Even so, only recently is receiving enough attention, mainly due to the great development obtained in the polymeric material science. Nowadays, this process is applied in industrial scale for production of high purity nitrogen from air and for hydrogen recovery from hydrocarbon mixtures in
Publicado em: 2002