Výsledky vyhledávání - "André L. C. Machado"

Porous media investigation before and after hydrochloric acid injection on a pre-salt carbonate coquinas sample

Autor: André L. C. Machado, A.P. Teles, N. Bize-Forest, Alexandre Pépin, Inayá Lima, Ricardo Tadeu Lopes

Publikováno v: Applied Radiation and Isotopes. 110:160-163

Porous space characterization of carbonate rocks is an important aid in petroleum exploration from carbonate reservoir. In this study, X-ray microtomography technique was applied to evaluate total porosity of a coquina sample extracted from pre-salt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14de3e3a256c9631439753856c925c16
https://doi.org/10.1016/j.apradiso.2016.01.005

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A study of asphaltene-resin interactions

Autor: André L. C. Machado, André Duarte Bueno, Luiz Marques, Juliana O. Pereira, Elizabete F. Lucas, Valdo da Silva Marques, Gaspar González, Claudia R. E. Mansur

Publikováno v: Journal of the Brazilian Chemical Society v.23 n.10 2012
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 23, Issue: 10, Pages: 1880-1888, Published: 26 OCT 2012

A study was carried out to investigate the interaction between asphaltenes (in toluene solutions) and resins (in n-heptane solutions). To better understand the type of interaction between these fractions, it was quantified the resin uptake when aspha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d463bd45ddbaf9227cd6c6a46c0e5762
https://doi.org/10.1590/s0103-50532012005000060

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Influence of ethylene-co-vinyl acetate copolymers on the flow properties of wax synthetic systems

Autor: André L. C. Machado, Elizabete F. Lucas

Publikováno v: Journal of Applied Polymer Science. 85:1337-1348

Wax crystallization can cause serious damage to petroleum flow because as the viscosity increases, there is organic deposition in the pipe lines, which causes oil production reduction. Ethylene–vinyl acetate copolymers (EVA) are used as an alternat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f2ea5f5e047f899929a409e3c72e6d57
https://doi.org/10.1002/app.10761

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Poly(ethylene-co-vinyl acetate) (EVA) as wax inhibitor of a Brazilian crude oil: oil viscosity, pour point and phase behavior of organic solutions

Autor: André L. C. Machado, Gaspar González, Elizabete F. Lucas

Publikováno v: Journal of Petroleum Science and Engineering. 32:159-165

Several techniques have been used to minimize the problems caused by the wax deposition, and the continuous addition of polymeric inhibitors is considered an attractive technological alternative. The addition of copolymers like polyacrylates, polymet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::190425ce7542ee4d096609a8b27a21ee
https://doi.org/10.1016/s0920-4105(01)00158-9

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THE INFLUENCE OF VINYL ACETATE CONTENT OF THE POLY(ETHYLENE-CO-VINYL ACETATE) (EVA) ADDITIVE ON THE VISCOSITY AND THE POUR POINT OF A BRAZILIAN CRUDE OIL

Autor: André L. C. Machado, Elizabete F. Lucas

Publikováno v: Petroleum Science and Technology. 19:197-204

Petroleum companies have enhanced the offshore exploration, where the fields are located under deep water. In such cases, the low temperature of the water leads to the cooling of the oil and provokes wax deposition. Several techniques are used to red

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6972dfd7e75c5c8b6c87ae5fc6dba5f8
https://doi.org/10.1081/lft-100001234

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POLY(ETHYLENE-CO-VINYL ACETATE) (EVA) COPOLYMERS AS MODIFIERS OF OIL WAX CRYSTALLIZATION

Autor: Elizabete F. Lucas, André L. C. Machado

Publikováno v: Petroleum Science and Technology. 17:1029-1041

This work describes the performance of poly(ethylene-co-vinyl acetate) (EVA) copolymers as pour point reducer and organic deposits inhibitor. The molecular weight, molecular weight distribution and vinyl acetate content of the EVA copolymers were det

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9222e4a11d6f37c3b382addb520adaf2
https://doi.org/10.1080/10916469908949763

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Application of high temperature high resolution gas chromatography to paraffinic deposits in petroleum production pipelines

Autor: Francisco Radler de Aquino Neto, Maria Conceiçao Zupo Fernandes, Carlos Alberto Caetano, Alberto dos Santos Pereira, Jari N. Cardoso, André L. C. Machado

Publikováno v: Journal of High Resolution Chromatography. 17:259-263

HTHRGC was found essential for optimizing representative preparation of high molecular weight samples and enabling fingerprinting of heavy fractions of crude oils and associated paraffinic deposits in production pipelines. Laboratory experiments aime

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::90c2f25a6e58141f4daaa10537c51872
https://doi.org/10.1002/jhrc.1240170413

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