Browsing by Subject "Temperature programmed desorption"

Now showing items 1-13 of 13

    • Article  

      Carbon dioxide storage in olivine basalts: Effect of ball milling process 

      Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, Andréas; Ioannou, Ioannis; Efstathiou, Angelos M.; Kyratsi, Theodora (2015)
      The goal of this study is to propose a cost-effective method for the optimization of the ex situ carbonation of basaltic rocks. The ball milling process was applied to a sample of olivine basalt from the Troodos ophiolite ...
    • Article  

      Catalytic behavior of La-Sr-Ce-Fe-O mixed oxidic/perovskitic systems for the NO+CO and NO+CH4+O2 (lean-NOx) reactions 

      Belessi, Vassiliki C.; Costa, Costas N.; Bakas, Thomas V.; Anastasiadou, T.; Pomonis, Phillippos J.; Efstathiou, Angelos M. (2000)
      Mixed oxides of the general formula La0.5SrxCeyFeOz were prepared by using the nitrate method and characterized by XRD and Mossbauer techniques. The crystal phases detected were perovskites LaFeO3 and SrFeO3-x and oxides ...
    • Article  

      Effect of ball milling on the carbon sequestration efficiency of serpentinized peridotites 

      Rigopoulos, I.; Delimitis, A.; Ioannou, I.; Efstathiou, A. M.; Kyratsi, Theodora (2018)
      Mineral carbonation has been suggested as a safe carbon capture and storage (CCS) strategy for the mitigation of climate change. This study investigates the effect of ball milling on the CO2 sequestration capacity of ...
    • Article  

      Enhancing the rate of ex situ mineral carbonation in dunites via ball milling 

      Rigopoulos, Ioannis; Vasiliades, Michalis A.; Ioannou, Ioannis; Efstathiou, Angelos M.; Godelitsas, A.; Kyratsi, Theodora (2016)
      The investigation of potential options for CO2 sequestration is of vital importance for alleviating the ongoing climate problem. This paper presents an efficient method for enhancing the ex situ carbonation of dunites. The ...
    • Article  

      Enhancing the rate of ex situ mineral carbonation in dunites via ball milling 

      Rigopoulos, I.; Vasiliades, M. A.; Ioannou, I.; Efstathiou, A. M.; Godelitsas, A.; Kyratsi, Theodora (2016)
      The investigation of potential options for CO2 sequestration is of vital importance for alleviating the ongoing climate problem. This paper presents an efficient method for enhancing the ex situ carbonation of dunites. The ...
    • Article  

      A method to enhance the CO2 storage capacity of pyroxenitic rocks 

      Rigopoulos, Ioannis; Vasiliades, Michalis A.; Petallidou, Klito C.; Ioannou, Ioannis; Efstathiou, Angelos M.; Kyratsi, Theodora (2015)
      Investigation of new efficient pathways for CO2 sequestration is of great significance for the mitigation of climate change. Ultramafic rocks are considered among the most promising lithotypes for the safe storage of CO2 ...
    • Article  

      A method to enhance the CO2 storage capacity of pyroxenitic rocks 

      Rigopoulos, I.; Vasiliades, M. A.; Petallidou, Klito C.; Ioannou, I.; Efstathiou, A. M.; Kyratsi, Theodora (2015)
      Investigation of new efficient pathways for CO2 sequestration is of great significance for the mitigation of climate change. Ultramafic rocks are considered among the most promising lithotypes for the safe storage of CO2 ...
    • Article  

      N2O decomposition over ceria-promoted Ir/Al2O3 catalysts: The role of ceria 

      Pachatouridou, E.; Papista, E.; Delimitis, Andréas; Vasiliades, Michalis A.; Efstathiou, Angelos M.; Amiridis, Michael D.; Alexeev, O. S.; Bloom, D.; Marnellos, G. E.; Konsolakis, M.; Iliopoulou, E. (2016)
      The impact of CeO2 in the Al2O3-20wt% CeO2 support prepared by the co-precipitation method on the Ir particle size, morphology and oxidation state, and in turn on the deN2O catalytic activity (1000ppmN2O) of supported Ir ...
    • Article  

      On the potential use of quarry waste material for CO2 sequestration 

      Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, Andréas; Ioannou, Ioannis; Efstathiou, Angelos M.; Kyratsi, Theodora (2016)
      The use of solid wastes rich in Ca2+, Mg2+ and Fe2+ for the ex situ sequestration of CO2 could provide an economically and technologically viable option for the reduction of anthropogenic CO2 emissions. Here, we investigate ...
    • Article  

      On the potential use of quarry waste material for CO2 sequestration 

      Rigopoulos, I.; Petallidou, Klito C.; Vasiliades, M. A.; Delimitis, A.; Ioannou, I.; Efstathiou, A. M.; Kyratsi, Theodora (2016)
      The use of solid wastes rich in Ca2+, Mg2+ and Fe2+ for the ex situ sequestration of CO2 could provide an economically and technologically viable option for the reduction of anthropogenic CO2 emissions. Here, we investigate ...
    • Article  

      Surface reactivity of LaCoO3 and Ru/LaCoO3 towards CO, CO2 and C3H8: Effect of H2 and O2 pretreatments 

      Álvarez-Galván, M. C.; Constantinou, D. A.; Navarro, R. M.; Villoria, J. A.; Fierro, José Luis García; Efstathiou, Angelos M. (2011)
      The differences in surface reactivity of LaCoO3 and Ru/LaCoO3 solids after pre-treatment in a hydrogen or oxygen gas atmosphere towards oxidative steam reforming (OSR) of propane was probed by performing temperature-programmed ...
    • Article  

      Synergistic effects of crystal phases and mixed valences in La-Sr-Ce-Fe-O mixed oxidic/perovskitic solids on their catalytic activity for the NO+CO reaction 

      Belessi, Vassiliki C.; Bakas, Thomas V.; Costa, Costas N.; Efstathiou, Angelos M.; Pomonis, Phillippos J. (2000)
      Mixed oxidic and perovskite-type materials based on the La, Sr, Ce and Fe elements were prepared using a mixture of nitrates salts and heating at 1000°C. Three groups of solids were synthesized: (i) La(1-y)Ce(y)FeO3 (y=0.2, ...
    • Article  

      Water-gas shift reaction on Pt/Ce1- xTixO 2-δ: The effect of Ce/Ti ratio 

      Petallidou, Klito C.; Polychronopoulou, Kyriaki; Boghosian, Soghomon; Garcia-Rodriguez, S.; Efstathiou, Angelos M. (2013)
      Pt nanoparticles (1.2-2.0 nm size) supported on Ce1-xTi xO2-δ (x = 0, 0.2, 0.5, 0.8, and 1.0) carriers synthesized by the citrate sol-gel method were tested toward the water-gas shift (WGS) reaction in the 200-350 C range. ...