Listar QICM - Artículos por título
Mostrando ítems 64-83 de 156
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In situ hydration imaging study of a ye'elimite paste by ptychographic x-ray computed tomography
Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles
; Santacruz-Cruz, María Isabel; Trtik, Pavel; Da Silva, Julio C.; Cuesta-García, Ana María; Holler, Mirko; García-Aranda, Miguel Ángel[et al.] (2017)
Eco-cements are a desirable alternative to ordinary Portland cements because of their lower CO2 footprints. For instance, the manufacture of Calcium SulfoAluminate (CSA) cements is more environmentally friendly than that ... -
In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction
Álvarez-Pinazo, Gema; Cuesta-García, Ana María; García-Maté, Marta; Santacruz-Cruz, María Isabel; Ramírez-Losilla, Enrique; Sanfélix, Susana G.; Fauth, François[et al.] (Karen Scrivener, 2014)
Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here,we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA ... -
In-situ laboratory X-ray diffraction applied to assess cement hydration.
De Matos, Paulo R.; Neto, José da Silva Andrade; Jansen, Daniel; Gómez-de-la-Torre, María de los Ángeles; Kirchheim, Ana Paula; Campos, Carlos E. M.[et al.] (Elsevier, 2022)
In-situ X-ray diffraction (XRD) is a powerful tool to assess the hydration of cementitious materials, providing time-resolved quantitative analysis with reasonable accuracy without disturbing sample. However, the lack ... -
Influence of curing temperature on belite cement hydration: a comparative study with Portland cement
Shirani, Shiva; Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Olbinado, Margie P.; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2021-05-24)
Belite cements (BCs) could be a more sustainable binder than Portland cements (PCs) but adequate knowledge of the hydration features has still to be built. In particular, the mild curing hydration temperature effects have ... -
Influence of fly ash blending on hydration and physical behavior of Belite-Alite-Ye'elimite cements
Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles (2018-10-19)
A cement powder, composed of belite, alite and ye’elimite, was blended with 0, 15 and 30 wt% of fly ash and the resulting lended cements were further characterized. During hydration, the presence of fly ash caused the ... -
Influence of Lewis and Brønsted acid catalysts in the transformation of hexoses into 5-ethoxymethylfurfural
Torres-Olea, Benjamín; Fúnez Núñez, Inmaculada; García-Sancho, Cristina; Cecilia-Buenestado, Juan Antonio; Moreno-Tost, Ramón; Maireles-Torres, Pedro Jesús[et al.] (Elsevier, 2023)
Several sulfonated polymers, which are typical Brønsted acid catalysts, have been employed in the production of two biofuels: 5-ethoxymethylfurfural (EMF) and ethyl levulinate (EL) as main byproduct, and the catalytic ... -
Influence of morphology of zirconium-doped mesoporous silicas on 5-hydroxymethylfurfural production from mono-, di- and polysaccharides
Mérida Morales, Sandra; García-Sancho, Cristina; Oregui-Bengoechea, Mikel; Ginés-Molina, María José; Cecilia-Buenestado, Juan Antonio; Arias, Pedro Luis; Moreno-Tost, Ramón; Maireles-Torres, Pedro Jesús[et al.] (Elsevier B.V., 2020-02-21)
Different zirconium-doped mesoporous silicas (Zr-KIT-6, Zr-SBA-15, Zr-MCM-41 and Zr-HMS) were synthesized and evaluated in the glucose dehydration to 5-hydroxymethylfurfural (HMF). A Si/Zr molar ratio of 5 was chosen for ... -
Influence of Proton Conducting Cations on the Structure and Properties of 2D Anilate-Based Magnets
Palacios Corella, Mario; Fernández Espejo, Alejandro; Bazaga-García, Montse; Ramírez-Losilla, Enrique; Cabeza-Díaz, Aurelio; Clemente-León, Miguel; Coronado, Eugenio[et al.] (ACS publications, 2017-11-01)
The syntheses, structures, magnetic, and proton conductivity properties of a family of bimetallic anilate-based compounds with inserted alkylammonium cations are presented. The structures of (Me2NH2)[MnIICrIII(Br2An)3]·2H2O ... -
Influence of Structure-modifying Agents in the Synthesis of Zr-doped SBA-15 Silica and Their Use as Catalysts in the Furfural Hydrogenation to Obtain High Value-added Products through the Meerwein-Ponndorf-Verley Reduction
López-Asensio, Raquel; Jiménez-Gómez, Carmen Pilar; García-Sancho, Cristina; Moreno-Tost, Ramón; Cecilia-Buenestado, Juan Antonio; Maireles-Torres, Pedro Jesús[et al.] (MDPI, 2019-02-14)
Zr-doped mesoporous silicas with different textural parameters have been synthesized in the presence of structure-modifying agents, and then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), ... -
Influence of the Incorporation of Basic or Amphoteric Oxides on the Performance of Cu-Based Catalysts Supported on Sepiolite in Furfural Hydrogenation
Guerrero-Torres, Antonio; Jiménez-Gómez, Carmen Pilar; Cecilia-Buenestado, Juan Antonio; García-Sancho, Cristina; Quirante-Sánchez, José Joaquín; Mérida-Robles, Josefa María; Maireles-Torres, Pedro Jesús[et al.] (MDPI, 2019-03-31)
Cu-based catalysts supported on sepiolite have been tested in vapor-phase hydrogenation of furfural. The incorporation of basic or amphoteric metal oxides (magnesium oxide, zinc oxide, or cerium oxide) improves the catalytic ... -
Insights into the Dynamics of Grotthuss Mechanism in a Proton- Conducting Chiral bioMOF
Grancha, Thais; Ferrando-Soria, Jesús; Cano, Joan; Amorós, Pedro; Seoane, Beatriz; Gascón, Jorge; Bazaga-García, Montse; Losilla, Enrique R.; Cabeza-Díaz, Aurelio; Armentano, Donatella; Pardo, Emilio[et al.] (American Chemical Society, 2016-06-13)
Proton conduction in solids attracts great interest, not only because of possible applications in fuel cell technologies, but also because of the main role of this process in many biological mechanisms. Metal−organic frameworks ... -
Kaolinite-based zeolites synthesis and their application in CO2 capture processes
Cecilia-Buenestado, Juan Antonio; Vilarrasa García, Enrique; Morales-Ospino, Rafael; Finocchio, Elisabetta (Elsevier, 2022-07-15)
In light of the urgent need of reducing the atmospheric CO2 emissions, the use of low-cost adsorbents, that exhibit a high affinity and CO2 adsorption capacity, is a promising method from the economic and environmental ... -
Kinetic model for ye’elimite polimorphs formation during clinkering production of CSA cement
Berrio, Ariel; Tobón, Jorge Iván; Gómez-de-la-Torre, María de los Ángeles (Elsevier, 2022)
The calcium sulfoaluminate, orthorhombic (OY) and pseudo- cubic (CY) ye’elimite polymorphs, were synthesized by solid state reaction from SiO2, Al2O3, Fe2O3, CaCO3, Na2CO3, CaSO4·2H2O in specific oxide relationships. Thermal ... -
Layered Lanthanide Sulfophosphonates and Their Proton Conduction Properties in Membrane Electrode Assemblies
Bazaga-García, Montse; Salcedo, Inés R.; Pérez-Colodrero, Rosario Mercedes; Xanthopoulos, Konstantinos; Villemin, Didier; Stock, Norbert; López-González, Mar; Del Río, Carmen; Ramírez-Losilla, Enrique; Cabeza-Díaz, Aurelio; Demadis, Konstantinos D.; Olivera-Pastor, Pascual[et al.] (ACS publications, 2019-11-07)
Metal phosphonates containing acidic groups exhibit a wide range of proton conduction properties, which may enhance the performance of membrane electrode assemblies (MEAs). In this work, focus is placed on proton conduction ... -
Limestone calcined clay binders based on a Belite-rich cement
Redondo-Soto, Cinthya; Morales-Cantero, Alejandro; Cuesta-García, Ana María; Santacruz-Cruz, María Isabel; Gastaldi, Daniela; Canonico, Fulvio; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2023)
Portland-based Limestone Calcined Clay Cements, LC3, are receiving considerable attention because the CO2 footprint can be reduced up to 40 %. Here, we report a related family: Belite-rich-LC3. These blends are expected ... -
Local structure and Ca/Si ratio in C-S-H gels from hydration of blends of tricalcium silicate and silica fume
Dapiaggi, Monica; Santacruz-Cruz, María Isabel; Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Zea-Garcia, Jesus D.; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2021-03)
At the microscale, C-S-H gels from alite, or neat Portland cements, has a Ca/Si ratio close to 1.80. At the nanoscale, C-S-H is described by a defective tobermorite structure which allows a maximum Ca/Si ratio close to ... -
Luminescent and Proton Conducting Lanthanide Coordination Networks Based On a Zwitterionic Tripodal Triphosphonate
Bazaga-García, Montse; Angeli, Giasemi K.; Papathanasiou, Konstantinos E.; Salcedo, Inés R.; Olivera-Pastor, Pascual; Losilla, Enrique R.; Choquesillo-Lazarte, Duane; Hix, Gary B.; Cabeza-Díaz, Aurelio; Demadis, Konstantinos D.[et al.] (American Chemical Society, 2016-07-14)
The synthesis, structural characterization, luminescence properties, and proton conduction performance of a new family of isostructural cationic 2D layered compounds are reported. These have the general formula ... -
M/TiO2 (M = Fe, Co, Ni, Cu, Zn) catalysts for photocatalytic hydrogen production under UV and visible light irradiation
Díaz, Laura; Rodríguez, V. D.; González-Rodríguez, M.; Rodríguez-Castellón, Enrique; Algarra-González, Manuel; Núñez, Pedro; Moretti, E.[et al.] (2021-05-28)
In order to improve the photocatalytic response of TiO2 to UV and visible light for hydrogen photoproduction, low cost M/TiO2 semiconductor catalysts were prepared by the impregnation method of five different first row ... -
Manufacture of rich-sulfoaluminate belite cement at low temperature from waste mixture by dry and hydrothermal processes
Bouha, Faiza Nabila; Kacimi, Larbi; Gómez-de-la-Torre, María de los Ángeles (sciencedirect, 2022)
This study, within the framework of eco-cement development, aims to manufacture reactive belite-sulfoaluminate cement (BYF) as alternative to Portland cement (PC). This ecological cement is obtained at low temperature from ... -
Materials Design for N2O Capture: Separation in Gas Mixtures
Ballesteros-Plata, Daniel; Cecilia-Buenestado, Juan Antonio; Barroso Martín, Isabel; Jiménez-Jiménez, José; Infantes-Molina, Antonia; Rodríguez-Castellón, Enrique[et al.] (IOAP-MDPI, 2022-11-29)
The adsorption of greenhouse gases (GHG) as a method to reduce their emissions into the atmosphere is an alternative that is easier to implement industrially and cheaper than other existing technologies, such as chemical ...