Air Liquid Foams
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Estudos da atividade antiespumante de ésteres etílicos derivados de óleos vegetais / Estudo da atividade antiespumante de ésteres etílicos derivados de óleos vegetais
Gas-liquid foams are colloidal systems formed by air bubbles separated by a liquid thin film stabilized by surfactants, which are often found in many industrial processes. It becomes often necessary the use of antifoams to avoid loses of material or loses in the processs efficiency caused by a large foam production. The foaming mixtures utilized in this work
Publicado em: 2008
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2. Drenagem de espumas gás-líquidos e influência da presença de partículas e anti-espumantes / Air-liquid foams drainage and influence of the presence of particles and antifoams
This Dissertation presents results of two comercial antifoams on the stability of gas-liquid foams formed in the presence of an anionic surfactant, a non-ionic surfactant and colloidal particles. Air-liquid foams are colloidal systems formed by air bubbles separated by liquid films. The drainage or flow of the liquid contained within these films pass through
Publicado em: 2007
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3. Multidimensional modelling and calculation of combustion in porous media
In contrast with household heating systems based on open combustion flames, burners based on premixed combustion in inert porous media are characterized by higher thermal efficiency and high turndown ratio allied with compacity of the units. Moreover, porous burners, where a flame is anchored inside a porous matrix, are associated with low pollutants formati
Publicado em: 2005
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4. Drenagem de espumas gas-liquido na presença de campo eletrico CC
Air-liquid foam drainage is affected by electric de fields in the range of 10 - 70 V.cm. Fams were prepared by stirring aqueous surfactant solutions. Sodium lauryl sulfate (SDS), cetyltrimethyl- ammonium bromide (CTAB), [ [p-1,1,3,3 tetramethyl-butyl ] phenyl poly(etilenglycol) ether (TRITON X-100) were the surfactants used. Detergent foams containing:1-octa
Publicado em: 1987