Blending Models
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. An integrated optimization and simulation model for refinery planning including external loads and product evaluation
Abstract Because of its potential benefits, petroleum refineries are increasingly concerned about their planning operations. Although some refinery models for production planning were proposed, they are quite limited in their usefulness. This study describes an integrated approach involving nonlinear optimization and simulation of refinery units in order to
Braz. J. Chem. Eng.. Publicado em: 2018-01
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2. Combination of Propylene Glycol Alginate and Lauric Acid on Water Retention and Mechanical Properties of Soy Protein Isolate-Based Films
The water sorption, water barrier properties and mechanical behavior of soy protein isolate (SPI) based films combined with propylene glycol alginate (PGA) and lauric acid (La) via a direct- or co-dried blending process were investigated. Higher water retention ability and a single glass transition temperature (Tg) were found when the PGA was added to form d
J. Braz. Chem. Soc.. Publicado em: 2017-12
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3. EFFECT OF POLY (N- VINYPYRROLIDONE) ON THE NON-ISOTHERMAL CRYSTALLIZATION KINETICS AND VISCOELASTIC PROPERTIES OF PVDF FILMS
Abstract Poly(vinylidene fluoride) (PVDF) and PVDF blends with various molecular weights of poly (N- vinylpyrrolidone) (PVP) films were prepared in dimethyl formamide through the solution casting method. Non-isothermal melt crystallization studies of PVDF films were carried out by cooling the molten samples at different temperatures using differential scanni
Braz. J. Chem. Eng.. Publicado em: 2016-12
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4. A conceptualização de bandido em expressões bandido de x: uma perspectiva cognitivista / Conceptualization of bandit in expressions bandit of x: a cognitive perspective
Com vistas à conceptualização do conceito de BANDIDO em 32 expressões com a estrutura bandido de x, descrevemos, nesta dissertação, os modelos cognitivos idealizados subjacentes à construção de sentido de tais expressões, postulando-lhes um caráter de modelo cognitivo complexo, nos termos de Lakoff (1987), produtivo na língua. Constituem ainda o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2012
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5. O tratamento lexicográfico de vocábulos de cores na perspectiva da semântica cognitiva
Color definitions in Portuguese semasiological dictionaries are subject to much criticism. The analysis of color entries in AuE (2004), HouE (2001), MiE (2001), and AnMS (1813) revealed that none of these dictionaries have satisfactory entries when it comes to elucidating the meaning of colors. Moreover, it was observed that color definitions are quite simil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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6. Otimização no planejamento agregado de produção em indústrias de processamento de suco concentrado congelado de laranja
This work aim at developing models using linear programming, goal programming and robust optimization to support decision making in the frozen concentrated orange juice planning process. The proposed model includes orange harvesting plan, which takes into account oranges maturation curves. This fact leads to a model that incorporates a large portion of the s
Publicado em: 2009
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7. Contrastes entre estratégias de falantes bilíngues na produção de um diálogo e um monólogo em inglês
The purpose of this dissertation is to investigate the strategies used by a group of bilingual speakers in the production of a dialogue and a monologue in English and to analyse a listening activity from a course book. In order to do it, the theoretical background used in the investigations was based on the theories and models about coarticulation found in t
Publicado em: 2009
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8. Optimization models for diesel production : an industrial aplication / Modelos de otimização na produção de oleo diesel : uma aplicação industrial
This work has been developed integrating two traditional concepts of operational research and chemical engineering, respectively: supply chain optimization and global process optimization. The focus of the study is the PETROBRAS Paulínia Refinery, REPLAN, which integrates the downstream petroleum and derivatives complex of Brazil. There are two production t
Publicado em: 2008
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9. Estudo experimental e de simulação da fluidodinâmica e recobrimento em leito de jorro
The spouted bed technique has found application in many industrial processes such as drying of granular materials, blending of polymer chips, coating of tablets, and granulation of fertilizers and other materials. Although has an extensive application, the mechanisms of solids movement in spouted beds are still not completely understood. The knowledge of the
Publicado em: 2006
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10. METODOLOGIA DE RESOLUÇÃO DE PROBLEMAS DE PROGRAMAÇÃO LINEAR FUZZY / METHODOLOGY FOR SOLVING FUZZY LINEAR PROGRAMMING PROBLEMS
This work proposes an approach to obtain a solution to linear fuzzy programming problems. The approach described here presents a solution set in where both the variables values and the cost function optimun value to have an associated membership function. Thus, it is possible to provided not only a feasible solution set applicable to different scenarios but
Publicado em: 2005
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11. Planning and scheduling for petroleum refineries using mathematical programming
The objective of this paper is the development and solution of nonlinear and mixed-integer (MIP) optimization models for real-world planning and scheduling problems in petroleum refineries. Firstly, we present a nonlinear planning model that represents a general refinery topology and allows implementation of nonlinear process models as well as blending relat
Brazilian Journal of Chemical Engineering. Publicado em: 2002-04
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12. A planning model for petroleum refineries
The main objective of this paper is to develop a nonlinear planning model for refinery production. The model described here represents a general petroleum refinery and its framework allows the implementation of nonlinear process models as well as blending relations. This model assumes the existence of several processing units, producing a variety of intermed
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12