Made available in DSpace on 2015-04-14T13:59:08Z (GMT). No. of bitstreams: 1 459624.pdf: 4081568 bytes, checksum: deb8ee15216a9002e8e304b1daaae1b7 (MD5) Previous issue date: 2014-03-31 / High consumption of fossil fuels, relentless pursuit for economic development has generated excessive increase of anthropogenic emissions of greenhouse gases (GHGs), particularly of carbon dioxide (CO2). Carbon capture and geological storage is an alternative to mitigate CO2 emissions at industrial scale. This work aims to study the influence of salinity aqueous phase using CO2 in supercritical state on change of physical, chemical, and mineralogical parameters of sandstone reservoir rock, representative of the Furnas Formation in Paran? (PR) State, Brazil, in conditions of geological storage. Experiments were performed about 15 days in stainless steel batch reactors AISI 304 subjected to pressure and constant temperature (120 bar and 75 oC), similar to those found in geological formations. In parallel, PHREEQCv3.0 code was used to simulate the geological interactions Rock-CO2-Saline solution equilibrium. Characterization of solid was performed with Microscopy in Binocular Loupe, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) and, the aqueous phase was by ICP-OES, for analysis of cations and Ion Chomatography (IC) for analysis of anions. Those techniques converged to the same results where quartz, kaolinite and illite were found as primary mineral in abundance of mineralogical composition of the Furnas rock. Globally, the Furnas sample is not so reactive in the presence of CO2, milli-Q water and saline solution in geological storage conditions. However, partial dissolution of illite and reprecipitation of kaolinite and silica were identified at the lab scale. These results were confirmed by numerical simulations. / Consumo desenfreado de combust?veis f?sseis, busca incessante pelo desenvolvimento econ?mico tem gerado excessivo aumento das emiss?es antr?picas de gases de efeito estufa (GEE), principalmente de di?xido de carbono (CO2). A captura e o armazenamento geol?gico de carbono ? uma alternativa para mitigar as emiss?es de CO2 na escala industrial. Esse trabalho visa estudar a influ?ncia da salinidade da fase aquosa utilizando CO2 em estado supercr?tico na altera??o dos par?metros f?sicos, qu?micos, e mineral?gicos da rocha de arenito de reservat?rio, representativa da Forma??o Furnas no Estado do Paran? (PR), Brasil, em condi??es de armazenamento geol?gico. Realizou-se os experimentos durante 15 dias em reatores em batelada de a?o inoxid?vel AISI 304 submetidos ? press?o e temperatura constantes (120 bar e 75 oC), id?nticas ?s encontradas nas forma??es geol?gicas. Em paralelo, o c?digo PHREEQC-v3.0 foi utilizado para simular as intera??es geoqu?micas Rocha-CO2-Solu??o salina ao equil?brio. Uma caracteriza??o do s?lido foi realizada por Microscopia em Lupa Binocular, Difra??o de Raios-X (DRX), Microscopia Eletr?nica de Varredura (MEV) com espectroscopia de energia dispersiva (EDS) e, da fase aquosa foi por ICP-OES, para an?lise de c?tions, e cromatografia i?nica, para an?lise de ?nions. Estas t?cnicas convergiram para os mesmos resultados, onde quartzo, caulinita e ilita foram encontrados como minerais prim?rios em abund?ncia na composi??o mineral?gica da rocha Furnas. Em geral, a rocha Furnas mostrou-se pouco reativa em presen?a de CO2, ?gua Milli- Q ou solu??o salina para fins de armazenamento geol?gico. Por?m, se identificou a dissolu??o parcial de ilita e a (re)precipita??o de s?lica e caulinita, em escala laboratorial. Esses resultados foram confirmados pela modelagem num?rica.