Caracterização tecnológica de um calcário dolomítico in natura, calcinado e sulfatado como meio dessulfurante

Souza, Fabiana de; Bragança, Saulo Roca

doi:10.1590/s0366-69132013000200020

Cited by 5 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phases identified in the residue of dolomitic base, are identical to those presented in the characterization study of dolomitic limestone carried out by Souza & Bragança [30], except for the zeolite presence. The authors attributed the peaks located in the region close to 10º 2θ to a mineral clay, considering it as an impurity of the limestone rock.…”

Section: X-ray Diffractionsupporting

confidence: 71%

Physico-chemical characterization of paint industry residues for incorporation in cementitious matrix

et al. 2022

View full text Add to dashboard Cite

Before being reused, industrial waste needs to have its composition determined so that in the future, it will not cause harm to the people and to the environment. The present study proposes the characterization and reuse of the residue remaining in the production of leveling masses and textures as a component in the Portland cement mortar specimens in order to analyze the effects on the axial compressive strength. The residue generated was characterized by Infrared (IR) Absorption Spectroscopy, X-ray Diffraction (XRD), Atomic Emission (AE) and Thermogravimetric Analysis (TG/DTG). All analyzes confirmed the predominant presence of dolomite (CaMg(CO 3 ) 2 ) as the main component and absence of potentially toxic metals. The addition of 10% of the residue on the cement and sand mass or the replacement of 10% of the sand mass in the mortars had small impact on the axial compression strength. The standard deviation values found lead to the conclusion that the compressive strength of the studied mortars can be considered statistically similar.

show abstract

Section: X-ray Diffractionsupporting

confidence: 71%

Physico-chemical characterization of paint industry residues for incorporation in cementitious matrix

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The chemical composition of the dolomitic carbonate rock from outcrop is reported in Table 3. Concerning the analysis of chemical elements between fluorine and uranium, higher concentrations of CaO (36.4%), MgO (15.5%), SiO 2 (4.51%) and LOI (41.9%) were observed, which according to Souza and Bragança (2013) and Dolomite Mineral Data (2018) corresponds to a dolomitic carbonate sample. From the base material preparation, five particle size intervals were obtained: 300-600 lm, 150-300 lm, 74-150 lm, 20-74 lm and <20 lm.…”

Section: Construction Of the Samples With Disk Geometrymentioning

confidence: 94%

Preliminary analyses of synthetic carbonate plugs: consolidation, petrophysical and wettability properties

Florez¹,

Ferrari²

2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Synthetic plugs are available to understand oilfield properties and the behavior of oil in reservoirs where natural plugs cannot be extracted. Specifically, in cases where it is necessary to reproduce representative mineralogical and petrophysical characteristics from carbonate reservoirs, it is evident that there is a lack of publications focusing on synthetic plug construction. In this work, a methodology to construct synthetic carbonate plugs is proposed using disintegrated carbonate rock with controlled particle size, mixed in different weight fraction, uniaxial compaction with controlled load force velocity, pH, temperature, and bonding materials. Preliminary analysis of consolidation (basic consolidation and consolidation by water immersion test), wettability (contact angle measurements) and petrophysical properties (nitrogen expansion porosimetry measurements and theoretical porosity calculation) are reported in this study to determine which composition of the synthetic samples provides similar properties compared to that expected for natural rocks from carbonate reservoirs. Two compositions are recommended to construct synthetic samples: Composition 1 with a total quantity of 100 g of base material (50% w/w of <20 μm, 50% w/w of 20–74 μm) + 5% w/w of amide wax (relative to 100 g of base material) + 6% w/w (relative to 100 g of base material) of pH 3 hydrochloric acid solution; and Composition 2 with a total quantity of 100 g of base material (50% w/w of 150–300 μm, 50% w/w of 300–600 μm) + 5% w/w (relative to 100 g of base material) of amide wax + 6% w/w (relative to 100 g of base material) of pH 3 hydrochloric acid solution. In addition to the compositions, it is necessary to follow the reported procedure based on the uniaxial compaction with controlled load force (200 kN) and velocity (25 mm/min) and the sample’s drying temperature of 100 °C for 1 h aiming to obtain similar samples. These preliminary results will guide further dedicated petrophysical and wettability analysis to deeply understanding these sample’s properties and enhance the construction of synthetic samples more similar to the natural rocks from carbonate reservoirs.

show abstract

“…Table 3 presents the chemical composition of the used dolomitic carbonate, obtained by X-ray spectrometry fluorescence in the STD-1 (Standardless) calibration, concerning the analysis of chemical elements between fluorine and uranium. The Loss on Ignition (LOI) was carried out at 1020°C for 2 h. It is emphasized that according to reference [103], the high concentration of the compounds MgO (15.5-17.2%), SiO 2 (4.51-4.06%) and CaO (36.4-33.8%) corresponds to dolomitic calcareous samples. In this way, dolomitic carbonate rock samples were disintegrated and classified using the following steps.…”

Section: Proposal For Carbonate Plug Constructionmentioning

confidence: 99%

Construction of synthetic carbonate plugs: A review and some recent developments

Florez

Ferrari

Michelon

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Plugs are cylindrical rocks with known dimensions that are extracted typically from reservoir formations with representative mineralogical compounds, petrophysical properties and oilfield fluids. They are used in the laboratory to understand the behaviour of oil in reservoirs. One of their applications is to study the screening of chemicals, such as surfactants and polymers, for enhanced oil recovery research before being applied in the reservoir. Many of Brazil’s pre-salt basins are located in ultra-deep waters, and the high heterogeneities of its offshore carbonate reservoirs make the extraction of representative rock samples difficult, risky and expensive. The literature reports the construction of synthetic plug samples that reproduce rocks as an alternative and viable solution for this issue. However, there is a lack of publications that focus on the construction of representative carbonate plugs that considers both the mineralogical composition and petrophysics properties, such as porosity and permeability. In this work, the construction of synthetic plugs is studied, using a combination of published methodologies to achieve an alternative construction of synthetic carbonate plugs for laboratory scale studies. Using a procedure based on the use of pulverized rock matrices with known particle sizes, uniaxial compaction, and probable CaCO3 solubility control by changing temperature and pH, it was possible to obtain synthetic carbonate plugs with a similar mineralogy to the natural carbonate reservoir. However, further studies are necessary to obtain more controlled petrophysical properties of such samples.

show abstract

Caracterização tecnológica de um calcário dolomítico in natura, calcinado e sulfatado como meio dessulfurante

Cited by 5 publications

References 11 publications

Physico-chemical characterization of paint industry residues for incorporation in cementitious matrix

Physico-chemical characterization of paint industry residues for incorporation in cementitious matrix

Preliminary analyses of synthetic carbonate plugs: consolidation, petrophysical and wettability properties

Construction of synthetic carbonate plugs: A review and some recent developments

Contact Info

Product

Resources

About