Listar QICM - Artículos por título
Mostrando ítems 100-119 de 146
-
Processing and characterisation of standard and doped alite-belite-ye'elimite ecocement pastes and mortars
Zea-Garcia, Jesus D.; Gomez-de-la-Torre, Maria de los Angeles
; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel (2020-02-26)
Here, we report the processing optimisation of two laboratory-prepared alite-belite-ye'elimite ecocements (standard and doped) that release to the atmosphere ~13% less CO2 than Portland Cement during fabrication. The ... -
Production of Biofuels by 5-Hydroxymethylfurfural Etherification Using Ion-Exchange Resins as Solid Acid Catalysts
Torres-Olea, Benjamín; Fúnez Núñez, Inmaculada; Garcia-Sancho, Cristina; Cecilia-Buenestado, Juan Antonio; Moreno-Tost, Ramon; Maireles-Torres, Pedro Jesús[et al.] (mdpi, 2020-11-09)
In this work, acidic ion-exchange resins with strong Brönsted sulphonic groups were assessed in the catalytic etherification of the platform molecule 5-(hydroxymethyl)furfural (HMF) to 5-(ethoxymethyl)furfural (EMF), a ... -
Properties and Applications of Metal Phosphates and Pyrophosphates as Proton Conductors
P. Colodrero, Rosario M.; Olivera-Pastor, Pascual; Cabeza-Diaz, Aurelio; Bazaga-García, Montse (MDPI, 2022-02-09)
We review the progress in metal phosphate structural chemistry focused on proton conductivity properties and applications. Attention is paid to structure–property relationships, which ultimately determine the potential ... -
Pseudo-cubic crystal structure and phase transition in doped ye'elimite
Cuesta-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Ramirez-Losilla, Enrique; Santacruz-Cruz, Maria Isabel; García-Aranda, Miguel Ángel (ACS publications, 2014)
Sodalites are tridimensional alumino-silicate materials containing cages where loosely bonded anions are located. Ye'elimite, Ca4[Al6O12]SO4, is outstanding as an aluminate sodalite with a flexible framework accepting ... -
Quantitative disentanglement of nanocrystalline phases in cement pastes by synchrotron ptychographic X-ray tomography
Cuesta-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; Diaz, Ana; Trtik, Pavel; Holler, Mirko; Lothenbach, Barbara; García-Aranda, Miguel Ángel[et al.] (IUCr, 2019)
Mortars and concretes are ubiquitous materials with very complex hierarchical microstructures. To fully understand their main properties and to decrease their CO2 footprint, a sound description of their spatially resolved ... -
Reactive belite stabilization mechanisms by boron-bearing dopants
Cuesta-Garcia, Ana Maria; Losilla, Enrique R.; García-Aranda, Miguel Ángel; Sanz, Jesús; Gomez-de-la-Torre, Maria de los Angeles (Elselvier, 2012-01-27)
Belite-rich cements hold promise for reduced energy consumption and CO2 emissions, but their use is hindered by the slow hydration rates of ordinary belites. This drawback may be overcome by activation of belite by doping. ... -
Reactivity of C3S and model cement in presence of Na2S2O3 and NaSCN
Gonzalez-Panicello, Laura; Gomez-de-la-Torre, Maria de los Angeles; Palacios, Marta (Springer, 2023-01)
The impact of NaSCN and Na2S2O3 on the reactivity, microstructure and morphology of C3S and model cement (with a clinker containing 85% C3S and 15% C3A) pastes was systematically investigated. Results concluded that both ... -
Recent Advances in C-S-H Nucleation Seeding for Improving Cement Performances
Cuesta-Garcia, Ana Maria; Morales-Cantero, Alejandro; Gomez-de-la-Torre, Maria de los Angeles; García-Aranda, Miguel Ángel (MDPI, 2023)
Reducing cement CO2 footprint is a societal need. This is being achieved mainly by replacing an increasing amount of Portland clinker by supplementary cementitious materials. However, this comes at a price: lower mechanical ... -
Recent Advances in C-S-H Nucleation Seeding for Improving Cement Performances
(IOAP-MDPI, 2023-02-09)Reducing cement CO2 footprint is a societal need. This is being achieved mainly by replacing an increasing amount of Portland clinker by supplementary cementitious materials. However, this comes at a price: lower mechanical ... -
Recent Advances in Mechanochemical Pretreatment of Lignocellulosic Biomass
Pérez Merchán, Antonio Manuel; Rodríguez Carballo, Gabriela; Torres-Olea, Benjamín; Garcia-Sancho, Cristina; Maireles-Torres, Pedro Jesús; Merida-Robles, Josefa Maria; Moreno-Tost, Ramon[et al.] (IOAP-MPDI, 2022-08-17)
Biorefineries are industrial facilities where biomass is converted into chemicals, fuels and energy. The use of lignocellulose as raw material implies the development of pretreatments to reduce its recalcitrant character ... -
Recent Advances in Mesoporous Materials and Their Biomedical Applications
Cecilia-Buenestado, Juan Antonio; Moreno-Tost, Ramon (IOAP-MDPI, 2022-12-09)
Since the beginning of civilization, porous materials have been used for medical purposes. Some studies have reported that the first uses of applications of porous materials were carried out by the Ancient Egyptian or ... -
Recent studies of cements and concretes by synchrotron radiation crystallographic and cognate methods
García-Aranda, Miguel Ángel (Taylon & Francis, 2015)
The portfolio of available synchrotron radiation techniques is increasing notably for cements and pastes. Furthermore, sometimes the terminology is confusing and an overall picture highlighting similarities and differences ... -
Recovery of pentoses-containing olive stones for their conversion into furfural in the presence of solid acid catalysts
Fúnez Núñez, Inmaculada; Garcia-Sancho, Cristina; Cecilia-Buenestado, Juan Antonio; Moreno-Tost, Ramon; Serrano Cantador, Luis; Maireles-Torres, Pedro Jesús[et al.] (2020-06-24)
Olive stones were employed as feedstock for furfural production in two stages: 1) autohydrolysis of hemicellulosic fraction to recover their pentoses, mainly xylose, and 2) subsequent dehydration of pentoses into furfural. ... -
Relationship between the Structure and Transport Properties in the Ce1−xLaxO2−x/2 System
Zamudio-García, Javier; Porras-Vázquez, José Manuel; Canales-Vázquez, J.; Cabeza-Diaz, Aurelio; Losilla, Enrique R.; Marrero-López, David[et al.] (American Chemical Society, 2019-06-25)
La-doped CeO2 materials have been widely investigated for potential applications in different high-temperature electrochemical devices, such as fuel cells and ceramic membranes for hydrogen production. However, the crystal ... -
Rheological and hydration characterization of calcium sulfoaluminate cement pastes
García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; García-Aranda, Miguel Ángel (2015-05-14)
Calcium sulfoaluminate (CSA) cements are currently receiving a lot of attention because their manufacture produces less CO2 than ordinary Portland cement (OPC). However, it is essential to understand all parameters which ... -
Rietveld quantitative phase analyses of SRM 2686a: a standard Portland clinker
García-Maté, Marta; Álvarez-Pinazo, Gema; León-Reina, Laura; Gomez-de-la-Torre, Maria de los Angeles (2018-10-03)
SRM 2686a is a NIST reference Portland clinker with reported mineralogical analysis from powder diffraction and electron microscopy. This sample is used in ASTM C1365 test method for Rietveld quantitative phase analysis ... -
Rietveld Quantitative Phase Analysis of Oil Well Cement: in Situ Hydration Study at 150 Bars and 150 °C
Fraga, Edmundo; Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Gomez-de-la-Torre, Maria de los Angeles; Yañez-Casal, Armando; García-Aranda, Miguel Ángel[et al.] (MDPI - Publisher of Open Access Journals, 2019-06)
Oil and gas well cements are multimineral materials that hydrate under high pressure and temperature. Their overall reactivity at early ages is studied by a number of techniques including through the use of the consistometer. ... -
Rietveld Quantitative Phase Analysis of OPC Clinkers, Cements and Hydration Products
García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura (Mineralogical Society of America, 2012)
-
Rietveld quantitative phase analysis of yeelimite-containing cements
Álvarez-Pinazo, Gema; Cuesta-Garcia, Ana Maria; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Ramirez-Losilla, Enrique; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; García-Aranda, Miguel Ángel[et al.] (Karen Scrivener, 2012)
Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ... -
Rietveld quantitative phase analysis of Yeelimite-containing cements
Álvarez-Pinazo, Gema; Cuesta-Garcia, Ana Maria; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Ramirez-Losilla, Enrique; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2012-03-26)
Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ...