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Browsing by Subject "Koltvíoxíð"

Browsing by Subject "Koltvíoxíð"

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  • Egilsdottir, Hronn (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2017-02-08)
    Anthropogenic CO2 emissions, which are resulting in ocean acidification and a decrease in the saturation state for calcium carbonate (Ω), are a particular threat to calcifying marine biota. The aim of this thesis is to fill important knowledge gaps ...
  • Hussain, Javed; Jónsson, Hannes; Skulason, Egill (American Chemical Society (ACS), 2018-04-23)
    CO2 can be reduced electrochemically to form valuable chemicals such as hydrocarbons and alcohols using copper electrodes, whereas the other metal electrodes tested so far mainly form CO or formate, or only the side product, H2. Accurate modeling of ...
  • Clark, Deirdre; Oelkers, Eric H.; Gunnarsson, Ingvi; Sigfússon, Bergur; Snæbjörnsdóttir, Sandra Ósk; Aradóttir, Edda S.; Gíslason, Sigurður Reynir (Elsevier BV, 2020-06)
    The CarbFix method was upscaled at the Hellisheiði geothermal power plant to inject and mineralize the plant’s CO2 and H2S emissions in June 2014. This approach first captures the gases by their dissolution in water, and the resulting gas-charged water ...
  • Clark, Deirdre; Gunnarsson, Ingvi; Aradóttir, Edda S.; Arnarson, Magnús Þ.; Þorgeirsson, Þorsteinn A.; Sigurðardóttir, Sigrún S.; Sigfússon, Bergur; Snæbjörnsdóttir, Sandra Ósk; Oelkers, Eric H.; Gíslason, Sigurður Reynir (Elsevier BV, 2018-07)
    The CarbFix2 project aims to capture and store the CO2 and H2S emissions from the Hellisheiði geothermal power plant in Iceland by underground mineral storage. The gas mixture is captured directly by its dissolution into water at elevated pressure. ...
  • Hauri, Erik H.; Maclennan, J.; McKenzie, D.; Gronvold, K.; Óskarsson, N.; Shimizu, N. (Geological Society of America, 2017-11-16)
    Primitive basalt melt inclusions from Borgarhraun, northern Iceland, display large correlated variations in CO2 and nonvolatile incompatible trace elements (ITEs) such as Nb, Th, Rb, and Ba. The average CO2/ITE ratios of the Borgarhraun melt inclusion ...
  • Dabaieh, Marwa; Heinonen, Jukka; El-Mahdy, Deena; Hassan, Dalya M. (Elsevier BV, 2020-12-01)
    This study presents a comparison of the life cycle carbon emission (LCCO2) and embodied energy calculation between two kinds of bricks, sun-dried and fired clay, as means of evaluating the energy and climate impact of each brick type and the economics ...
  • Safarian, Sahar; Unnthorsson, Runar; Richter, Christiaan (Taiwan Association for Aerosol Research, 2020-05)
    In order to decrease spreading of Coronavirus disease 2019 (COVID-19) over the world, the activity of many industries has declined, several flights were cancelled and so many people staying home that made drop in fuel consumption in road transport. ...
  • Galeczka, Iwona; Oelkers, Eric H.; Gíslason, Sigurður Reynir (Elsevier BV, 2018-07)
    Chemical denudation rates during the 2014–15 Bárðarbunga eruption, calculated using river chemical fluxes, increased substantially confirming that volcanic activity and its products such as fresh lava, and acidic volatiles accelerates these rates. ...
  • Clark, Deirdre; Galeczka, Iwona M.; Dideriksen, Knud; Voigt, Martin J.; Wolff-Boenisch, Domenik; Gíslason, Sigurður Reynir (Elsevier BV, 2019-10)
    Mineralization of water dissolved carbon dioxide injected into basaltic rocks occurs within two years in field-scale settings. Here we present the results from a CO2-water-basaltic glass laboratory experiment conducted at 50 °C and 80 bar pressure in ...
  • Přikryl, Jan (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2018-05)
    Fluid-rock interaction is an important process in nature, and in many industrial fields. Fluid-rock interaction can be utilized to sequester industrial gases like CO2 and H2S in porous rocks of geothermal systems. The gases are re-injected, together ...
  • Snæbjörnsdóttir, Sandra Ósk (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2017-04-19)
    In-situ carbonation of basaltic rocks could provide a carbon storage solution for the long term. Permanence is essential for the success and public acceptance of carbon storage. The aim of this study was twofold, to evaluate and make a first estimate ...
  • Clark, Deirdre (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019-10-23)
    The reduction of carbon dioxide (CO2) emissions in the atmosphere is currently one of the main challenges facing humanity. One solution is carbon capture from concentrated sources and directly from the atmosphere, and long term storage in rocks. Basaltic ...
  • Tayyebi, Ebrahim (University of Iceland, School of Engineering and Natural Sciences, Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, 2020-10-22)
    The main target of this thesis is to use density functional theory-based simulations to study electrochemical CO2 and N2 reductions by employing a recent theoretical model of an electrochemical solid-liquid interface. This model is used to investigate ...
  • Fu, Weiqi; Guðmundsson, Steinn; Wichuk, Kristine; Palsson, Sirus; Pálsson, Bernhard Ö; Salehi-Ashtiani, Kourosh; Brynjolfsson, Sigurdur (Elsevier BV, 2019-03)
    To convert waste CO2 from flue gases of power plants into value-added products, bio-mitigation technologies show promise. In this study, we cultivated a fast-growing species of green microalgae, Chlorella vulgaris, in different sizes of photobioreactors ...
  • Tayyebi, Ebrahim; Hussain, Javed; Skulason, Egill (Royal Society of Chemistry (RSC), 2020-09-21)
    The electrochemical CO2reduction reaction (CO2RR) on RuO2and RuO2-based electrodes has been shown experimentally to produce high yields of methanol, formic acid and/or hydrogen while methane formation is not detected. This CO2RR selectivity on RuO2is ...