4,704 research outputs found
Proposed Methodology to Evaluate CO2 Capture Using Construction and DemolitionWaste
Since the Industrial Revolution, levels of CO2 in the atmosphere have been constantly
growing, producing an increase in the average global temperature. One of the options for Carbon
Capture and Storage is mineral carbonation. The results of this process of fixing are the safest in
the long term, but the main obstacle for mineral carbonation is the ability to do it economically in
terms of both money and energy cost. The present study outlines a methodological sequence to
evaluate the possibility for the carbonation of ceramic construction waste (brick, concrete, tiles) under
surface conditions for a short period of time. The proposed methodology includes a pre-selection of
samples using the characterization of chemical and mineralogical conditions and in situ carbonation.
The second part of the methodology is the carbonation tests in samples selected at 10 and 1 bar
of pressure. The relative humidity during the reaction was 20 wt %, and the reaction time ranged
from 24 h to 30 days. To show the e ectiveness of the proposed methodology, Ca-rich bricks were
used, which are rich in silicates of calcium or magnesium. The results of this study showed that
calcite formation is associated with the partial destruction of Ca silicates, and that carbonation was
proportional to reaction time. The calculated capture e ciency was proportional to the reaction time,
whereas carbonation did not seem to significantly depend on particle size in the studied conditions.
The studies obtained at a low pressure for the total sample were very similar to those obtained for
finer fractions at 10 bars. Presented results highlight the utility of the proposed methodology
Mineral carbonation of ceramic brick at low pressure and room temperature. A simulation study for a superficial CO2 store using a common clay as sealing material
This research explores the possibilities of CO2 sequestration on ceramic bricks in a short time and at surface conditions. The experiment was carried out in a specially designed reaction chamber, filled with brick wastes and sealed with common clays. The brick used were composed of quartz, wollastonite, diopside, orthoclase and anhydrite, and the common clay was a marl composed of calcite, quartz, illite, smectite and kaolinite. Experimental condition in the reaction chamber were: reaction time 5 months, pressure of CO2 0.5 bar, 4:1 solid/water ratio. The experiment was followed by XRD, XRF, BET, physical sorption by N2 and CO2, Hg porosity, TG-DTA, SEM and ICP-EOS. After the CO2 treatment, wollastonite and anhydrite were practically destroyed and some diopside and orthoclase. Calcite precipitated as new phase (up to 48 wt%), and small amount of illite was the result of orthoclase alteration. Concerning the sealing clay, the CO2 produced an increment of calcite content (from 32 to 41 wt%) and a partial destruction of smectite, particularly close to the upper part of the brick layer. These results are hopeful in relation with the possible mineral carbonation of building ceramic waste in a short time at surface conditions, and open the opportunity to use those wastes for CO2 trapping in an appropriate system, as a quarry reclamation
Demo 21. Cuerpos cargados y el electroscopio
Objetivo: Mostrar la carga de objetos por fricción, mediante el uso de un instrumento clásico como el
electroscopio, en el que se pone de manifiesto la fuerza electrostática y la conservación de la
carga
Applied Neuroethics: the practical Consequences of Neuropositivism
El objetivo de este trabajo es mostrar las consecuencias prácticas de una autocomprensión
positivista de la neuroética aplicada. Esta ética se ocupa de los impactos éticos y sociales derivados
de la utilización de los hallazgos neurocientificos, en especial de las neurotecnologías. La
intención es mostrar que para realizar esta tarea la neuroética debe superar el paradigma neuropositivista
dominante que solo le conduce a la disolución del ámbito moral y, en el terreno práctico, al
silencio cómplice ante los problemas surgidos en la aplicación de las neurociencias. Para este fin
daremos los siguientes pasos. En primer lugar, analizaremos los rasgos básicos de toda ética aplicada
y desde ellos el origen y los objetivos de la neuroética aplicada. En segundo lugar, veremos cómo las
investigaciones neuroéticas confunden el ámbito social con el ámbito moral, eliminando así de entrada
toda perspectiva ética. Por último, ejemplificaremos las consecuencias prácticas de esta disolución
en el caso de las políticas públicas, analizando el papel que puede cumplir y no cumple la neuroética
aplicada frente al neuropoder generado por las neurotecnologías.The objective of this work is to show the practical consequences of the positivist selfcomprehension
of applied neuroethics. This ethics deals with the ethical and social impacts that derive
from applying neuroscientific findings, especially from neurotechnologies. The intention is to show that
in order to perform this task, neuroethics must exceed the dominant neuropositivist paradigm that only
leads it to dissolve the moral domain and, in the practical domain, an accomplice-type silence when
faced with problems that arise upon applying neurosciences. To this end, we take the following steps:
we firstly analyse the basic features of the whole applied ethics and with them, the origin and objectives
of applied neuroethics. We will then see how neuroethical research confuses the social domain with the
moral domain, and how it thus eliminates access to any ethical perspective. Finally, we will exemplify the
practical consequences of this dissolution in public politics by analysing the role that may comply, but
does not comply, with applied neuroethics as opposed to the neuropower created by neurotechnologies.Este estudio se inserta en el Proyecto de Investigación de I+D+I «Política, Empresa y
Educación desde la Neuroética Aplicada» FI2013-47136-C2-2-P, financiado por el Ministerio
de Economía y Competitividad
De cara al mar : estudi etnològic dels ports de Cambrils i Arenys de Mar i el seu paper en la identitat marítima catalana
IPEC Anàlis
Neuropolitics and Democracy: a necessary dialogue
El artículo se centra en la relación entre los avances de la neuropolítica y una teoría de la democracia que tiene en la deliberación racional y en la búsqueda de acuerdos su eje central. El punto de partida para este diálogo interdisciplinar es la actual desafección que padecen nuestros sistemas democráticos. A partir de ahí se destacan tanto los peligros de una neuropolítica que comprende los procesos políticos como procesos mentales, como la necesidad de introducir la dimensión afectiva en la política deliberativa. La cuestión que se plantea es si la neuropolítica constituye un buen antídoto contra el excesivo racionalismo de las concepciones deliberativas y participativas de la democracia o más bien representa el último revés para nuestra forma de entender y desarrollar la democracia. La respuesta vendrá desde un concepto de democracia que tiene en la sociedad civil su principal potencial de cambio y transformación social**.The article focuses on the relationship between advances in neuropolitics and a theory of democracy grounded on rational deliberation and the search for agreement. This interdisciplinary dialogue starts from the current disaffection with our democratic systems, and goes on to highlight both the dangers of a neuropolitics that understands political processes as mental processes, and the need to introduce the affective dimension in deliberative politics. The paper poses the question of whether neuropolitics is a good antidote to the excessive rationalism of the deliberative and participative conceptions of democracy, or whether it represents the latest setback to our way of understanding and developing democracy. The response derives from a concept of democracy in which civil society is the main potential for change and social transformation
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