Next Article in Journal
Recent Advances in Carbonaceous Photocatalysts with Enhanced Photocatalytic Performances: A Mini Review
Next Article in Special Issue
Biosorption of Methylene Blue Dye Using Natural Biosorbents Made from Weeds
Previous Article in Journal
Improving the Magnetic Properties of Non-Oriented Electrical Steels by Secondary Recrystallization Using Dynamic Heating Conditions
Previous Article in Special Issue
CO Adsorption Performance of CuCl/Activated Carbon by Simultaneous Reduction–Dispersion of Mixed Cu(II) Salts
Open AccessArticle

Effect of High Pressure on the Reducibility and Dispersion of the Active Phase of Fischer–Tropsch Catalysts

1
Micromeritics Instrument Corporation, 4356 Communications Drive, Norcross, GA 30093, USA
2
GIR QUESCAT-Departamento de Química Inorgánica, Universidad de Salamanca, 37008 Salamanca, Spain
3
INAMAT-Departamento de Ciencias, Universidad Pública de Navarra, 31006 Pamplona, Spain
*
Author to whom correspondence should be addressed.
Materials 2019, 12(12), 1915; https://doi.org/10.3390/ma12121915
Received: 28 May 2019 / Revised: 3 June 2019 / Accepted: 10 June 2019 / Published: 13 June 2019
(This article belongs to the Special Issue Porous Materials for Environmental Applications)
The effect of high pressure on the reducibility and dispersion of oxides of Co and Fe supported on γ-Al2O3, SiO2, and TiO2 has been studied. The catalysts, having a nominal metal content of 10 wt.%, were prepared by incipient wetness impregnation of previously calcined supports. After drying at 60 °C for 6 h and calcination at 500 °C for 4 h, the catalysts were reduced by hydrogen at two pressures, 1 and 25 bar. The metal reduction was studied by temperature-programmed reduction up to 750 °C at the two pressures, and the metal dispersion was measured by CO chemisorption at 25 °C, obtaining values between 1% and 8%. The physicochemical characterization of these materials was completed by means of chemical analysis, X-ray diffraction, N2 adsorption-desorption at −196 °C and scanning electron microscopy. The high pressure lowered the reduction temperature of the metal oxides, improving their reducibility and dispersion. The metal reducibility increased from 42%, in the case of Fe/Al2O3 (1 bar), to 100%, in the case of Fe/TiO2 (25 bar). View Full-Text
Keywords: Fischer–Tropsch; supported iron oxide; supported cobalt oxide; reducibility; dispersion Fischer–Tropsch; supported iron oxide; supported cobalt oxide; reducibility; dispersion
Show Figures

Figure 1

MDPI and ACS Style

Yunes, S.; Vicente, M.Á.; Korili, S.A.; Gil, A. Effect of High Pressure on the Reducibility and Dispersion of the Active Phase of Fischer–Tropsch Catalysts. Materials 2019, 12, 1915.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop