Search Results - "Freitas, Júlio C O"

Synergistic Effects of Magnesium Oxide and SBR Latex Additives on Cement Sheath Stability in Oil Well Operations by Ramalho, Ramón V A, Alves, Salete M, Freitas, Júlio C O, Batista, Willame G S, Silva, Fabricio P F

“…Leaks through cement sheaths remain a complex and challenging issue in the oil industry, representing a persistent obstacle that has endured for decades. The…”
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Formulation and Study of an Environmentally Friendly Microemulsion-Based Drilling Fluid (O/W) with Pine Oil by Sousa, Roxana P. F. de, Braga, Glauco S., Silva, Raphael R. da, Leal, Giovanna L. R., Freitas, Júlio C. O., Madera, Vivian S., Garnica, Alfredo I. C., Curbelo, Fabiola D. S.

“…This work has developed and evaluated a microemulsion-based drilling fluid formulation with characteristics to be applied in oil wells. The microemulsion was…”
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Energy potential and thermogravimetric study of pyrolysis kinetics of biomass wastes by Silva, Janduir E., Calixto, Guilherme Q., de Almeida, Cassia C., Melo, Dulce M. A., Melo, Marcus A. F., Freitas, Julio C. O., Braga, Renata M.

“…The use of agricultural wastes for energy conversion has been widely studied as renewable and carbon neutral energy sources. This paper aims to evaluate the…”
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Effect of pretreatment on pyrolysis products of Pennisetum purpureum Schum. by Py-GC/MS by Braga, Renata M., Melo, Dulce M. A., Melo, Marcus A. F., Freitas, Julio C. O., Boateng, Akwasi A.

“…Elephant grass ( Pennisetum purpureum Schum.) is one such resource with a great amount of carbohydrate and lignin polymers that together represent high…”
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Evaluation of density influence on resistance to carbonation process in oil well cement slurries by Costa, Bruno L. de S., Freitas, Julio C. de O., Melo, Dulce M. de A., Araujo, Romero G. da S., Oliveira, Yvis H. de, Simão, Cristina A.

“…[Display omitted] •Cement slurries with different densities exposed to CO2.•Investigation of carbonation caused by the medium with CO2.•Analysis of the…”
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Renewable aromatics through catalytic flash pyrolysis of pineapple crown leaves using HZSM-5 synthesized with RHA and diatomite by Barbosa, Andrey S., Siqueira, Lorena A.M., Medeiros, Rodolfo L.B.A., Melo, Dulce M.A., Melo, Marcus A.F., Freitas, Julio C.O., Braga, Renata M.

“…•Aromatic compounds via catalytic flash pyrolysis of pineapple's crown waste.•Improve bio-oil properties by selectively produce valuable chemical.•Oxygenated…”
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Sustainable cement slurry using rice husk ash for high temperature oil well by Vidal, Anderson V., Araujo, Romero G.S., Freitas, Julio C.O.

“…In oil well cementing where high temperature are involved, a silica source is add to the cement composition to inhibit cement sheath compressive strength…”
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Characterization and comparative study of pyrolysis kinetics of the rice husk and the elephant grass by Braga, Renata M., Melo, Dulce M. A., Aquino, Flavia M., Freitas, Julio C. O., Melo, Marcus A. F., Barros, Joana M. F., Fontes, Maria S. B.

“…A comparative evaluation of different biomasses allows the choice that presents the best potential as fuel for energy production. The knowledge of the thermal…”
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Technical evaluation of calcium sulphate α-hemihydrate in oilwell application: An alternative to reduce the environmental impacts of Portland cement by Meireles, Petrucia D.S., Pereira, Dennys S.S., Melo, Marcus A.F., Braga, Renata M., Freitas, Julio C.O., Melo, Dulce M.A., Silvestre, F.R.S.

“…The oil industry has been drilling wells since the last century using Portland cement as a cementing basic material. There are several environmental impacts…”
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Catalytic upgrading of Elephant grass (Pennisetum purpureum Schum) pyrolysis vapor using WO3 supported on RHA and RHA-MCM-41 by Braga, Renata M., Melo, Dulce M.A., Sobrinho, Eledir V., Barros, Joana M.F., Melo, Marcus A.F., Carvalho, Alexandre F.M., do Socorro B Fontes, Maria, Freitas, Julio C.O.

“…[Display omitted] •Catalytic pyrolysis of Elephant Grass using WO3 over rice husk ash and RHA-MCM-41.•Selectively production of high added value chemicals over…”
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Pyrolysis kinetics of elephant grass pretreated biomasses by Braga, Renata M., Costa, Tiago R., Freitas, Julio C. O., Barros, Joana M. F., Melo, Dulce M. A., Melo, Marcus A. F.

“…The Elephant Grass ( Pennisetum purpureum Schum) was pretreated by two independent processes, through washing with hot water (W-EG) and acid solution (AW-EG)…”
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Non-symmetrical three and two-core ring mesogens based on quinoxaline and benzimidazole derivatives: Supramolecular layers through amphoteric donating/accepting H-bonds by de Oliveira, André H., Silva, Welisson P., da Silva, Jordan K., Freitas, Júlio.C.O., de Souza, Miguel A.F., Cristiano, Rodrigo, Menezes, Fabrício G.

“…Self-assembly-based molecular structures have proven to be highly relevant to the development of soft materials. This work reports the synthesis, thermal…”
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Formulation of novel ecofriendly microemulsion-based drilling fluids for improving rheological and filtration characteristics by Leal, Giovanna L.R., Garnica, Alfredo I.C., Silva, Raphael R., Viana, Luara R., Júnior, Agostinho C. Bezerra, Freitas, Júlio C.O., Curbelo, Fabiola D.S.

“…The main objective of this work was to formulate not environmentally harmful drilling fluids obtained from microemulsion systems, using an aqueous phase…”
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Evaluation of novel microemulsion-based (O/W) drilling fluid with nonionic surfactant and shale interaction mechanisms by Silva, Raphael R., Garnica, Alfredo I.C., Leal, Giovanna L.R., Viana, Luara R., Freitas, Júlio C.O., Barros, Alex N., Silva, Thales L.S., Neto, João Adauto de S., Curbelo, Fabiola D.S.

“…The increasing production of hydrocarbons from unconventional reservoirs, particularly water-sensitive formations, has led to the emergence of technologies…”
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The effect of rice husk ash as pozzolan in addition to cement Portland class G for oil well cementing by Soares, Lech W.O., Braga, Renata M., Freitas, Julio C.O., Ventura, Rafael A., Pereira, Dennys S.S., Melo, Dulce M.A.

“…The usage of rice husk biomass ash from agribusiness in addition to or partially replacing cement is a noble purpose and a good way of sustainable development…”
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