Browsing by Subject "Catalyst selectivity"

Article

Catalytic removal of nitrates from waters

Constantinou, C. L.; Costa, Costas N.; Efstathiou, Angelos M. (2010)

The selective catalytic reduction of nitrates (NO3 -) in pure water towards N2 formation by the use of gaseous H2 and in the presence of O2 (air) at 1 atm total pressure and 25 °C has been investigated over Pd-Cu supported ...

Article

Kinetics of methane oxidative coupling on zinc-doped titanium oxide

Efstathiou, Angelos M.; Boudouvas, D.; Vamvuka, Despina; Verykios, Xenophon E. (1992)

A kinetic study of methane conversion to C2-hydrocarbons was conducted by cofeeding methane and oxygen at 1 bar total pressure over a series of zinc-doped TiO2 catalysts. The zinc dopant concentration was varied between 1 ...

Article

Mechanistic aspects of the H2-SCR of NO on a Novel Pt/MgO-CeO2 catalyst

Costa, Costas N.; Efstathiou, Angelos M. (2007)

Steady State Isotopic Transient Kinetic Analysis (SSITKA) coupled with Temperature-Programmed Surface Reaction (TPSR) experiments, using on line Mass Spectroscopy (MS) and in situ DRIFTS have been performed to study essential ...

Article

NO x control via H 2-selective catalytic reduction (H 2-SCR) technology for stationary and mobile applications

Polychronopoulou, Kyriaki; Efstathiou, Angelos M. (2012)

This review paper provides an overview of the use of hydrogen (H 2) gas towards the selective catalytic reduction of nitrogen oxides (NO x) under strongly oxidizing conditions found in many industrial flue gas streams and ...

Article

Selective catalytic reduction of NO by H2/C3H6 over Pt/Ce1-xZrxO2-Δ: The synergy effect studied by transient techniques

Kalamaras, Christos M.; Olympiou, G. G.; Pârvulescu, V. I.; Cojocaru, B.; Efstathiou, Angelos M. (2017)

A series of Pt/CexZr1-xO2-δ(x = 0.4–0.6) solids were synthesized and evaluated for the SCR of NO under lean burn conditions (2.5 vol% O2) using C3H6and H2as reducing agents. SSITKA-Mass Spectrometry, SSITKA-DRIFTS and other ...

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

Article

The selective oxidation of methane to C2-hydrocarbons over lithium-doped TiO2 catalysts

Papageorgiou, D.; Efstathiou, Angelos M.; Verykios, Xenophon E. (1994)

The oxidative coupling of methane (OCM) to C2-hydrocarbons was studied on a series of lithiumdoped titania catalysts by cofeeding methane (PCH4 = 0.5 bar) and oxygen (Po2 = 0.07-0.16 bar) at 1 bar total pressure in the ...