Now showing items 28-47 of 51
Posada Pérez, Sergio (Date of defense: 2018-03-12)
Our society has a problem with the use of fossil fuels, due to the vast and exceeding emissions derived from human activities. Two ways could be consider to mitigate these harmful effects. On the one hand, the capture, ...
Escobar Romero, Ana Maria (Date of defense: 2018-12-09)
La modificació de les superfícies dels materials permet obtenir propietats diferents a les que presenta el substrat prèviament o preservar-lo del medi que l’envolta. Les tècniques emprades amb aquest objectiu són molt ...
Regordosa Romagosa, Anna (Date of defense: 2017-05-03)
Aquesta tesi s’ha dividit en dos blocs principals, el primer bloc tracta de la formació d’escòria durant la producció de les foses amb grafit esferoïdal i el segon bloc de la influència dels paràmetres del procés sobre la ...
Calvo de la Rosa, Jaume (Date of defense: 2019-10-25)
This doctoral Thesis has been focused on the preparation of magnetic materials by different methods, the characterization of their structural characteristics, and the understanding of their mechanical and magnetic properties. ...
Ozaeta Laverde, Pablo (Date of defense: 2017-07-12)
Natural Gas with more than 80% methane has a liquefaction temperature around -165 ° C. Temperature at which the gas reduces its volume by a factor of 600/1. This operating temperature makes the use of ferritic materials ...
Cuko, Andy (Date of defense: 2018-09-24)
Properties of nanomaterials are known to be size dependent and generally are very different from those of the corresponding bulk. Such behaviour, which is strongly system and structure dependent, allows one to tune material’s ...
Alonso Benito, Gerard (Date of defense: 2019-11-29)
Two main topics are treated in this doctoral thesis from a theoretical and computational point of view: the gas capture and separation from post-combustion flue gases, and the enhanced oil recovery from oil reservoirs. The ...
Prats Garcia, Hèctor (Date of defense: 2019-03-25)
The research work presented in this thesis is divided in two main topics: gas separation and heterogeneous catalysis. Although the systems studied in one part and another are quite different, they share two fundamental ...
Oriol López, Roger (Date of defense: 2023-10-23)
[eng] Groundwater has been traditionally considered a reliable source of freshwater. However, the low replenishment rates and the increasing contamination due to different anthropogenic activities, such as the use of ...
Svobodova, Adela (Date of defense: 2022-07-19)
For the development of more compact and efficient thermal systems, nanofluids are presented as a promising option to replace conventional heat transfer fluids. Nanofluids are a suspension of low concentration of nanoparticles ...
Majó Robles, Marc (Date of defense: 2024-07-02)
[eng] The world's energy dilemma, balancing supply and demand, finds a potential solution in energy storage technologies. Energy storage systems store excess energy during low-demand periods for later use. This approach ...
Saranjam, Leila (Date of defense: 2023-10-30)
[eng] A compound’s solvent−water partition coefficient (log P) measures the equilibrium ratio of the compound’s concentrations in a two-phase system: as two solvents in contact or a system of micelles in an aqueous ...
Quezada Reyes, Víctor Alejandro (Date of defense: 2021-01-29)
La producción chilena de cobre procede de la hidrometalurgia y la concentración; el concentrado de cobre es tratado tradicionalmente mediante pirometalurgia. De acuerdo a Cochilco, el cobre producido en el año 2019, vía ...
Ye, Zhihong (Date of defense: 2019-11-29)
Organic micropollutants, including pharmaceuticals, personal care products (PCPs), pesticides, dyes and many other industrial chemicals have become one of the most solid barriers for the effective and safe wastewater ...
Mondelo-Martell, Manel (Date of defense: 2018-06-18)
Quantum confinement effects, understood as the changes on the structure and dynamics of a molecule when it goes from a free environment to a cavity with some characteristic length of the order of the nanometer, represent ...
Alcón Rovira, Isaac (Date of defense: 2018-03-14)
In this PhD thesis I have studied through state-of-the-art quantum simulations (mainly within the density functional theory approach, DFT) triarylmethyl (TAM) based systems with potential for future nano-devices and designed ...
Francese, Tommaso (Date of defense: 2019-03-25)
In this work, we characterized and studied the properties associated to DTA-based bistable organic molecular magnetic systems, namely PDTA and TDPDTA, respectively. In both cases, the low and high temperature phases have ...
Bedoya Escobar, Juliana (Date of defense: 2017-07-12)
La proyección fría es una técnica de proyección térmica que permite la obtención de recubrimientos metálicos y metal/cerámicos con estructuras densas (porosidad inferior a 0,1%) y libres de óxidos. De manera general, ésta ...
Garcia Cardona, Júlia (Date of defense: 2023-12-04)
[eng] Conventional catalysts for polymer electrolyte fuel cells are based on Pt supported on porous carbons, generally carbon blacks. However, Pt is expensive and scarce and is poisoned by CO, which is present in the ...
Gumí Audenis, Berta (Date of defense: 2018-04-27)
Biological membranes (BMs) are self-sealing boundaries, which confine the permeability barriers of cells and organelles and provide the means to compartmentalize functions. Apart from being crucial for the cell structure, ...