Browsing by Author "Petallidou, Klito C."

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

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

Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, A.; Ioannou, Ioannis; Efstathiou, A. 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

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

Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, A.; Ioannou, Ioannis; Efstathiou, A. 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

The effect of La3+, Ti4+ and Zr4+ dopants on the mechanism of WGS on ceria-doped supported Pt catalysts

Petallidou, Klito C.; Kalamaras, Christos M.; Efstathiou, Angelos M. (2014)

Platinum nanoparticles supported on single CeO2 and TiO 2 metal oxides and Ce0.8Ti0.2O 2-δ solid solution were prepared to investigate the effect of Ti4+-doping of ceria on important mechanistic and kinetic aspects of the ...

Article

The effect of La3+-doping of CeO2 support on the water-gas shift reaction mechanism and kinetics over Pt/Ce1-xLaxO2-δ

Kalamaras, Christos M.; Petallidou, Klito C.; Efstathiou, Angelos M. (2013)

Platinum nanoparticles (dPt=1.0-1.2nm) supported on single CeO2 and La2O3 metal oxides and Ce0.8La0.2O2-δ solid solution were prepared to investigate for the first time the effect of La3+-doping of ceria on important ...

Article

Effect of support composition on the origin and reactivity of carbon formed during dry reforming of methane over 5 wt% Ni/Ce1-xMxO2-δ (M = Zr4+, Pr3+) catalysts

Makri, M. M.; Vasiliades, Michalis A.; Petallidou, Klito C.; Efstathiou, Angelos M. (2016)

Carbon dioxide reforming of methane to synthesis gas in the 550-750°C range over 5 wt% Ni/Ce1-xMxO2-δ (M = Zr4+, Pr3+) solids has been investigated with respect to the effects of support chemical composition and reaction ...

Article

Low-temperature water-gas shift on Pt/Ce0.5La0.5O2 - δ: Effect of support synthesis method

Petallidou, Klito C.; Boghosian, Soghomon; Efstathiou, Angelos M. (2015)

A series of 0.5 wt% Pt/Ce0.5La0.5O2 - δ (Ce:La = 1:1) catalysts, the supports of which were prepared by different methods, namely: (i) sol-gel using citrate or oxalate as complexing agent, (ii) pechini, and (iii) urea ...

Article

Low-temperature water-gas shift on Pt/Ce0.8La0.2O2-δ-CNT: The effect of Ce0.8La0.2O2-δ/CNT ratio

Petallidou, Klito C.; Polychronopoulou, Kyriaki; Fierro, José Luis García; Efstathiou, Angelos M. (2015)

Hybrid materials of (100 - x) wt% Ce0.8La0.2O2-δ-x wt% CNT composition (x = 0, 7.5, 20.5, 32.5, 44.1 and 100) were synthesized using the urea-assisted co-precipitation method and used as supports of 0.5 wt% Pt toward the ...

Article

Low-temperature water-gas shift on Pt/Ce1-xLaxO2-δ: Effect of Ce/La ratio

Petallidou, Klito C.; Efstathiou, Angelos M. (2013)

Pt nanoparticles (1.0-1.4nm size) supported on Ce1-xLaxO2-δ (x=0.0, 0.2, 05, 0.8 and 1.0) carriers, the latter prepared by the citrate sol-gel method, were tested toward the water-gas shift (WGS) reaction in the 200-400°C ...

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

A method to enhance the CO2 storage capacity of pyroxenitic rocks

Rigopoulos, Ioannis; Vasiliades, Michalis; Petallidou, Klito C.; Ioannou, Ioannis; Efstathiou, A. M.; Kyratsi, Theodora (2015)

Article

A method to enhance the CO2 storage capacity of pyroxenitic rocks

Rigopoulos, Ioannis; Vasiliades, Michalis; Petallidou, Klito C.; Ioannou, Ioannis; Efstathiou, A. M.; Kyratsi, Theodora (2015)

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, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, A.; Ioannou, Ioannis; Efstathiou, A. M.; Kyratsi, Theodora (2016)

•Novel nanomaterials were produced via ball milling (BM) of quarry waste material.•Various morphological and structural modifications occurred after the BM process.•The optimum conditions are 20h of BM with 50wt% ethanol ...

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

On the potential use of quarry waste material for CO2 sequestration

Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, A.; Ioannou, Ioannis; Efstathiou, A. M.; Kyratsi, Theodora (2016)

•Novel nanomaterials were produced via ball milling (BM) of quarry waste material.•Various morphological and structural modifications occurred after the BM process.•The optimum conditions are 20h of BM with 50wt% ethanol ...

Article

Oxy-chlorination as an effective treatment of aged Pd/CeO 2-Al 2O 3 catalysts for Pd redispersion

Lambrou, Panayiota S.; Polychronopoulou, Kyriaki; Petallidou, Klito C.; Efstathiou, Angelos M. (2012)

The present work reports on the effects of oxy-chlorine gas treatment (use of Cl 2/O 2/He gas mixture) applied on a 5wt% Pd/20wt% CeO 2-Al 2O 3 catalyst towards Pd redispersion. X-ray diffraction (XRD), X-ray photoelectron ...

Article

Reply to the Letter to the Editor concerning the comments of Dr. F. Meunier to the article Appl. Catal. B: Environ. 136-137 (2013) 225-238, Kalamaras et al., titled "The effect of La3+-doping of CeO2 support on the water-gas shift reaction mechanism and kinetics over Pt/Ce1-xLaxO2-δ"

Efstathiou, Angelos M.; Petallidou, Klito C. (2014)

Article

Selective catalytic reduction of NOx by hydrogen (H2-SCR) on WOx-promoted CezZr1-zO2 solids

Väliheikki, A.; Petallidou, Klito C.; Kalamaras, Christos M.; Kolli, T.; Huuhtanen, M.; Maunula, T.; Keiski, R. L.; Efstathiou, Angelos M. (2014)

The selective catalytic reduction of NOx by H2 (H2-SCR) under strongly oxidizing conditions (520ppm NOx/1% H2/5% O2/10% CO2/He