Listar Química Inorgánica, Cristalografía y Mineralografía - (QICM) por título
Mostrando ítems 40-59 de 454
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Behavior of Belite cement blended with Calcium sulfoaluminate cement: an Ecocement
(2019-09-26)Belite Portland Cements (BPC) and calcium sulfoaluminate cements (CSA) are considered as environmentally friendly cements due to their lower CO2 emissions. These ecocements (BPC and CSA) emit about 0.03 and 0.18 less tons ... -
Belite calcium sulfoaluminate cement early hydration: citric acid sensitivity.
(2023)Three buckets, corresponding to three selected samples, of the same type of belite calcium sulfoaluminate (BCSA) cements have been studied. These cements show very similar elemental and mineralogical compositions, and ... -
Belite cements and their activation
(Elsevier, 2020-11)Belite cements, BCs, containing mainly belite, alite and calcium aluminates, are currently used as low heat cements. These binders produce high amounts of C–S–H gel and have very good durability properties which are reviewed. ... -
Belite clinkers with increasing aluminium content: effect of calcium aluminates on calcium silicate hydration
(Elsevier, 2022)Belite cements (BCs) could have advantages over Portland cements concerning durability, low heat development and the use of less demanding raw materials. The activation of BCs by sulfur addition at the clinkering stage and ... -
Belite hydration at high temperature and pressure by in situ synchrotron powder diffraction
(2020-10-16)Portland cements are currently used as Oil‐Well‐Cements for the sheath between the metal casing and the borehole. At high pressures and temperatures, the resulting C-S-H gel(s) is partly unstable and it can react to give ... -
Bimetallic Niobium-Based Catalysts Supported on SBA-15 for Hydrodeoxygenation of Anisole
(ACS, 2021-12-17)The effect of adding iron, cobalt or nickel to a prepared niobium-supported catalyst using mesoporous silica SBA-15 as a support was evaluated in the hydrodeoxygenation (HDO) reaction of anisole, chosen as a model compound ... -
Boosting the Performance of La0.8Sr0.2MnO3-δ Electrodes by The Incorporation of Nanocomposite Active Layers
(Wiley, 2022-07-07)The use of active layers is a promising strategy to improve the properties of air electrodes for solid oxide fuel cells (SOFCs). In this work, La0.8Sr0.2MnO3-δ is combined with different oxide ion conductors Ce0.9Gd0.1O1.95, ... -
“Breathing” in Adsorbate-Responsive Metal Tetraphosphonate Hybrid Materials
(Wiley-VCH Verlag GmbH&Co. KGaA, Weinheim, 2009-05-28)The structures of various layered calcium tetraphosphonates (CaH6DTMP; H8DTMP=hexamethyl- tetrakis(methylenephosphonic acid)), have been determined. Starting from CaH6DTMP·2H2O, thermal treatment and subsequent exposure ... -
C-S-H seeding activation of Portland and Belite cements: An enlightening in situ synchrotron powder diffraction study
(Elsevier, 2022-11)C-S-H seeding in Portland cements is well known from basic scientific works and field applications. Moreover, this activation approach could be beneficial for low-CO2 cements under development where a general drawback is ... -
Calcium aluminate cement conversion analysed by ptychographic nanotomography
(Elsevier, 2020-08-17)Calcium aluminate cements are used for special applications but are nowadays banned for general structural purposes due to the calcium aluminate hydrate conversion, that has led, for concretes fabricated with high water ... -
Calcium sulfoaluminate composites incorporating microencapsulated phase change materials for thermal energy storage in buildings
(UMA Editorial, 2021-06-18)This thesis focuses on investigating the development of new calcium sulfoaluminate cement composite incorporating microencapsulated phase change materials (MPCMs).Calcium sulfoaluminate cements are a type of more sustainable ... -
Caracterización de tobelita obtenida mediante síntesis hidrotermal de caolinita a 200ºC
(2014-01-20)El objetivo de este trabajo es la caracterización mediante difracción de rayos X (DRX), espectroscopía infrarroja (FTIR), espectroscopía Raman, y microscopía electrónica de transmisión (HRTEM-AEM) de tobelita formada a ... -
Catalizadores ácidos basados en Nb2O5 para procesos sostenibles en biorrefinerías: producción de biodiésel, acroleína y furfural
(Universidad de Málaga, Servicio de Publicaciones y Divulgación Científica, 2014)En la actualidad, se pretende sustituir gran parte del consumo energético mundial basado en los combustibles fósiles por energía procedente de fuentes renovables. En este sentido, el uso de la biomasa como energía alternativa ... -
Catalizadores de cobre soportados en kerolita para la hidrogenación del furfural en fase gas
(2018-07-16)La biomasa está adquiriendo un papel fundamental para la producción de energía, biocombustibles y productos químicos. La hemicelulosa tiene un alto potencial ya que su hidrólisis y deshidratación de la xilosa resultante ... -
Catalizadores de cu-Mn para la hidrogenación de furfural en fase gas
(2021)La biomasa está adquiriendo un papel fundamental para la producción de energía, biocombustibles y productos químicos. Su hidrogenación a alcohol furfurílico (FOL) es la principal aplicación del furfural, proceso que se ... -
Catalizadores de nitruro de níquel soportados en una sílice comercial para la hidrogenación selectiva de furfural en fase gaseosa
(2019-07-04)En las últimas décadas, el crecimiento del consumo mundial de energía, el agotamiento de las reservas de petróleo y las preocupaciones ambientales han incrementado el interés en el desarrollo de alternativas a los combustibles ... -
Catalizadores de Ru soportado sobre hidrotalcitas con diferente relación mg/al para la hidrogenación de fenol.
(2023)El ciclohexanol y la ciclohexanona son productos de alto valor añadido ya que son intermedios en la producción de compuestos como: ácido oxálico, nailon y caprolactama y que se emplean, también, como disolventes industriales. ... -
Catalizadores nanoestructurados con aplicaciones medioambientales. Hidrodesoxigenación de biocombustibles y purificación de hidrógeno
(UMA Editorial, 2018-11-25)La presente tesis plantea el desarrollo de sistemas catalíticos para el estudio de reacciones de interés energético y medioambiental. La primera parte se centra en la síntesis de catalizadores activos en reacciones de ... -
Catalytic Activity of Mixed Al2O3-ZrO2 Oxides for Glucose Conversion into 5-Hydroxymethylfurfural
(MDPI, 2020-08-04)In the present work, a series of catalysts based on aluminum and zirconium oxides was studied for the transformation of glucose into 5-hydroxymethylfurfural. These catalysts were characterized by using experimental techniques, ... -
Catalytic dehydration of glycerol to acrolein: catalysts and processes
(2016-05-24)The valorization of glycerol has been widely studied notably due to the oversupply of the latter from biodiesel production. Among the different upgrading reactions, dehydration to acrolein is of high interest due to the ...