Bubble Point
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Effect of calcium concentration on calcite flotation from apatite using carbonic gas
Abstract The flotation process currently considered for apatite concentration from the Santa Quitéria phosphate deposit (Brazil), involves bulk flotation of apatite and calcite with anionic collector at pH=10 followed by calcite flotation at pH=5.5, adjusted with H3PO4. Although this concept is efficient from the point of view of separation between apatite
REM, Int. Eng. J.. Publicado em: 2020-06
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2. GUILHERME, Alexandre Anselmo; MORGAN, W. John. Philosophy, dialogue, and education. Nine Modern European Philosophers [Filosofia, diálogo e educação: nove filósofos europeus modernos]. London: Routledge, 2018. 190 p.
Abstract The flotation process currently considered for apatite concentration from the Santa Quitéria phosphate deposit (Brazil), involves bulk flotation of apatite and calcite with anionic collector at pH=10 followed by calcite flotation at pH=5.5, adjusted with H3PO4. Although this concept is efficient from the point of view of separation between apatite
Bakhtiniana, Rev. Estud. Discurso. Publicado em: 2020-06
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3. Dynamic Compressive Strength and Failure of Natural Lake Ice Under Moderate Strain Rates at Near Melting Point Temperature
Abstract This paper presents a series of uniaxial compressive experiments on natural lake ice under moderate strain-rate in the range of 10−1 to 102 s−1 at −0.1 °C. Natural lake ice samples of 8 cm by 8 cm in cross section and 20 cm high were used to investigate strain-rate dependence of uniaxial compressive strength and flaw effects on ice strength u
Lat. Am. j. solids struct.. Publicado em: 2017-09
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4. TOWARD PREDICTIVE MODELS FOR ESTIMATION OF BUBBLE-POINT PRESSURE AND FORMATION VOLUME FACTOR OF CRUDE OIL USING AN INTELLIGENT APPROACH
Abstract Accurate estimation of reservoirs fluid properties, as vital tools of reservoir behavior simulation and reservoir economic investigations, seems to be necessary. In this study, two important properties of crude oil, bubble point pressure (Pb) and formation volume factor (Bob), were modelled on the basis of a number of basic oil properties: temperatu
Braz. J. Chem. Eng.. Publicado em: 2016-12
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5. METODOLOGIA EXPERIMENTAL PARA REAÇÕES GÁS-LÍQUIDO
Although the gas-liquid reactions are employed in many industrial processes, this issue in the most of time is not included in the curriculum of Chemistry and Chemical Engineering courses. This work aims to propose the study of gas-liquid reaction for the degree course, considering a widespread system, the reaction of CO2-NaOH. A reaction mechanism was propo
Quím. Nova. Publicado em: 2016-06
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6. Treatment of cattle-slaughterhouse wastewater and the reuse of sludge for biodiesel production by microalgal heterotrophic bioreactors
Microalgal heterotrophic bioreactors are a potential technological development that can convert organic matter, nitrogen and phosphorus of wastewaters into a biomass suitable for energy production. The aim of this work was to evaluate the performance of microalgal heterotrophic bioreactors in the secondary treatment of cattle-slaughterhouse wastewater and th
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-12
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7. Hydrodynamic and absorption studies of carbon dioxide absorption in aqueous amide solutions using a bubble column contactor
The present work analyses the carbon dioxide absorption process in aqueous n-alkylpyrrolidones solutions, from the point of view of hydrodynamic studies as well as mass transfer, using a bubble column contactor. An analysis of the influence of solute concentration and gas flow-rate is complemented by the study of the effect caused by the alkyl group on the h
Braz. J. Chem. Eng.. Publicado em: 2013-12
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8. Estudo do comportamento PVT de misturas de metano e fluidos de perfuração base éster / Study of the PVT behavior of methane and ester based drilling fluids mixtures
During conventional drilling operations, it is necessary to maintain the wellbore pressure greater than the reservoir pore pressure, otherwise a kick may occur. If the well control procedure is not effective during the circulation of the formation influx out of the well, a blowout could happen, which is a dangerous event concerning safety and environmental i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2010
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9. Espectroscopia de alcalinos em Hélio líquido / Spectroscopy of Alkali in Liquid Helium
Alkali atoms are good probes for the understanding of liquid He properties. As such considerable experimental attention has been devoted to the analysis of the changes of line position and widths of the absorption spectra of alkali atoms in liquid He environment. On the theoretical side, several studies have used simplified models such as bubble and cluster
Publicado em: 2010
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10. Modelagem do Equilíbrio de Fases entre Hidrocarbonetos Leves e Pesados / Modeling of phase equilibrium between lght and heavy hydrocarbons
O comportamento de fases para sistemas binários com um hidrocarboneto leve e um pesado é muito importante tanto para o projeto real de um processo quanto para o desenvolvimento de modelos teóricos. Para atender a crescente demanda por informação experimental de equilíbrio de fases a altas pressões, o objetivo deste estudo é obter uma metodologia que
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2009
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11. Secagem de sementes de gramíneas (Brachiaria brizantha) em leito fluidizado
Drying operation is an important stage of the processing that precedes the storage of seeds, since that with low moisture contents, these can retain their power of germination and other qualities for long periods. The objective of this work was to perform a study of drying of grass seeds (Brachiaria brizantha) in a batch fluidized bed, in order to evaluate t
Publicado em: 2008
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12. Produção de goma xantana em reator de coluna de bolha utilizando processo de batelada repetida / Xanthan gum production in a buble column reactor using a repeated bath process
The aim of this work is to evaluate xanthan production in a bubble column reactor using a repeated batch process as well as to optimize de gum production operational conditions and evaluate some of the typical steps of the recovery process. Two Xanthomonas campestris strains were evaluated: ATCC 13951 (or NRRL B-1459) and ATCC 55298. The cycles were comprise
Publicado em: 2008