Buscar
Mostrando ítems 1-10 de 264
Estudo teórico e experimental do equilíbrio de fases de hidratos de dióxido de carbono na presença de etanol
(Universidade Tecnológica Federal do ParanáCuritibaBrasilDepartamento Acadêmico de MecânicaEngenharia MecânicaUTFPR, 2015-06-23)
Hydrates are solid crystalline structures formed by water and gas. Some of the practical situations that are favorable to the formation of hydrates are the operations that involve multiphase flow, under low temperatures ...
Estudo experimental da formação de hidratos de metano
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Química e Biologia, 2014-03-10)
Hydrates are crystals formed in the presence of water and especially of low molecular weight hydrocarbons and under conditions of high pressure and/or low temperature. The conditions for hydrate formation are similar to ...
Effect of cement composition on the early hydration of blended cements with natural zeolite
(Springer, 2017-05)
This paper studies the addition (0–40% w/w) of natural zeolite (NZ, 84% clinoptilolite) in blended cements made with Portland cement (PC) with low and medium C3A content. The isothermal calorimetry was used to understand ...
NON-STRUCTURAL COMPOSITES OF SAWDUST FROM ARGENTINA WOOD SPECIES AND COMERCIAL CEMENTS
(Univ Bio-bioConcepcionChile, 2009)
Caracterização experimental preliminar da formação de hidratos de metano com fluidos de perfuração na indústria de petróleo
(Universidade Tecnológica Federal do ParanáCuritibaBrasilDepartamento Acadêmico de MecânicaEngenharia MecânicaUTFPR, 2015-04-09)
Hydrates are crystalline solids composed of water molecules and molecules of gas or liquid (usually low molecular weight hydrocarbons). In the oil sector, with the growing demand for the exploration of increasingly deep ...
Simultaneous solidification of two catalyst wastes and their effect on the early stages of cement hydration
(Springer, 2011-08-01)
Two catalyst wastes (RNi and RAI) from polyol production were considered as hazardous, due to their respective high concentration of nickel and aluminum contents. This article presents the study, done to avoid environmental ...
Rheological and composition analyses of CO2 gas hydrates
(Universidade Federal do Rio de JaneiroBrasilInstituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de EngenhariaPrograma de Pós-Graduação em Engenharia MecânicaUFRJ, 2021)
Estudo experimental do equilíbrio de fases de hidratos de dióxido de carbono na presença de inibidores termodinâmicos
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Mecânica e de MateriaisUTFPR, 2016-10-10)
Gas hydrates are crystalline compounds formed by hydrogen-bonded water frameworks. Hydrates are stabilized by non-polar molecules of low molecular diameters (guest molecules), which are occluded in cavities (host lattice) ...
Investigação de métodos de predição de formação de hidratos na presença de inibidores
(Universidade Tecnológica Federal do ParanáCuritibaBrasilGraduação em Engenharia MecânicaUTFPR, 2019-07-02)
Hydrates formation in oil extraction pipes Offshore is one of the biggest and recurrent challenges regarding flow assurance. The Oil Industry has great interest in understanding the phenomenon of hydrates formation, because ...
Surface and hysteresis properties of lipid interphases composed by head group substituted phosphatidylethanolamines
(Elsevier, 2013-09)
This work analyzes the surface properties of PE-containing membranes modified at the head group region by the addition of methyl and ethyl residues at or near the amine group. These residues alter the lipid–lipid and ...