Browsing by Subject "Chemical activation"

Article

Dry reforming of methane over 5 wt% Ni/Ce1-xPrxO2-δ catalysts: Performance and characterisation of active and inactive carbon by transient isotopic techniques

Vasiliades, Michalis A.; Makri, M. M.; Djinović, P.; Erjavec, B.; Pintar, A.; Efstathiou, Angelos M. (2016)

The effects of Ce1-xPrxO2-δ support composition (x = 0.0–0.8) and reaction temperature (550–750 °C) on the catalytic activity and selectivity and important features of the mechanism of the dry reforming of methane (DRM) ...

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

Origin and reactivity of active and inactive carbon formed during DRM over Ni/Ce0.38Zr0.62O2-δ studied by transient isotopic techniques

Vasiliades, Michalis A.; Djinović, P.; Davlyatova, L. F.; Pintar, A.; Efstathiou, Angelos M. (2016)

The role of Ce0.38Zr0.62O2-δ redox support and that of reactants CH4 and CO2 in the carbon-path of dry reforming of methane (DRM) at 750°C over a 3wt% Ni/Ce0.38Zr0.62O2-δ catalyst were investigated. In particular, meticulously ...

Article

The preparation and adsorptive properties of ammonia-activated viscose rayon chars

Tomlinson, J. B.; Freeman, J. J.; Theocharis, Charis R. (1993)

Viscose rayon chars have been activated in ammonia under varying conditions in order to investigate whether the presence of N-containing groups in the char structure led to a limitation of pore development in the micropore ...

Article

Rates of activation and scanning electron microscopy of polyarylamide-derived chars

Tomlinson, J. B.; Freeman, J. J.; Sing, K. S. W.; Theocharis, Charis R. (1995)

Fibrous activated carbons were prepared from Kevlar® (poly (p-phenylene terephthalamide)) and Nomex® (poly (m-phenylene isophthalamide)) by carbonisation in nitrogen and subsequent activation in steam of carbon dioxide to ...

Article

Reactivation of an aged commercial three-way catalyst by oxalic and citric acid washing

Christou, Stavroula Y.; Birgersson, H.; Fierro, José Luis García; Efstathiou, Angelos M. (2006)

The efficiency of dilute oxalic and citric acid solutions on improving the oxygen storage capacity (OSC) and catalytic activity of a severely aged (83 000 km) commercial three-way catalyst (TWC) has been investigated. ...

Article

Solid Stress Facilitates Fibroblasts Activation to Promote Pancreatic Cancer Cell Migration

Kalli, M.; Papageorgis, P.; Gkretsi, V.; Stylianopoulos, T. (2018)

Pancreatic fibroblasts are continuously gaining ground as an important component of tumor microenvironment that dynamically interact with cancer cells to promote tumor progression. In addition, these tumor-infiltrated ...

Article

Thermal conductivity and degradation behavior of HDPE/graphene nanocomposites: Pyrolysis, kinetics and mechanism

Tarani, E.; Terzopoulou, Z.; Bikiaris, D. N.; Kyratsi, Theodora; Chrissafis, K.; Vourlias, G. (2017)

Graphene-filled high-density polyethylene nanocomposites varying filler’s size (5, 10 and 25 × 10−6 m in diameter) were prepared by the melt-mixing method, and their thermal properties are then investigated by TG, Py–GC/MS ...