Journal ArticleDOI
Effect of the support on the fischer-tropsch synthesis with co/nb2o5 catalysts
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TLDR
In this article, Niobia-supported cobalt catalysts reduced at temperatures between 553 and 773 K were compared with alumina-supported catalysts, and the results were interpreted in terms of the strong metal-support interaction (SMSI) effect.Abstract:
Niobia-supported cobalt catalysts reduced at temperatures between 553 and 773 K have been compared with alumina-supported cobalt catalysts. The hydrogen adsorption capacity and the catalytic properties for the CO–H2 reaction were independent of the temperature of reduction of the alumina-supported catalyst. In contrast, the amount of hydrogen chemisorbed and the activity for CO conversion decreased with increasing reduction temperature for the niobia-supported catalyst. The results are interpreted in terms of the strong metal–support interaction (SMSI) effect, established for Co/Nb2O5 after reduction at 673 and 773 K and not fully destroyed during the catalytic reaction. Higher temperatures of reduction of Co/Nb2O5 catalysts results in a better selectivity towards C5+ compounds and a low selectivity towards C1, in the CO–H2 reaction performed at 533 K.read more
Citations
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Journal ArticleDOI
Niobium Compounds: Preparation, Characterization, and Application in Heterogeneous Catalysis.
Izabela Nowak,Maria Ziolek +1 more
Journal ArticleDOI
Niobium-containing catalysts—the state of the art
TL;DR: Niobium oxides and mixed oxides as well as sulfides, nitrides (oxynitrides), carbides (oxycarbides), and phosphates are considered in this paper.
Journal ArticleDOI
Recent developments on heterogeneous catalytic CO2 reduction to methanol
Israf Ud Din,Israf Ud Din,Maizatul Shima Shaharun,Mshari A. Alotaibi,Abdulrahman I. Alharthi,Abdul Naeem +5 more
TL;DR: In this article, a comprehensive review of all the recent studies conducted during the past decades is presented, where different aspects of the reaction system such as thermodynamic constrains, catalysts formulation, reactors aspects, reaction mechanism and influences of reaction conditions are discussed in detail.
Journal ArticleDOI
Structural investigation of LaCoO3 and LaCoCuO3 perovskite-type oxides and the effect of Cu on coke deposition in the partial oxidation of methane
TL;DR: In this paper, a single phase perovskite-type oxides were obtained as single phase and investigated in the partial oxidation of methane through temperature-programmed surface reactions (TPSR).
Journal ArticleDOI
Effect of support on methane decomposition for hydrogen production over cobalt catalysts
Rosenir Rita de Cássia Moreira da Silva,Hugo A. Oliveira,Ana Carolina Pietro Fernandes Guarino,Bianca Benício de Toledo,Mariana B.T. Moura,Bárbara Thomazelli Marques de Oliveira,Fabio B. Passos +6 more
TL;DR: Cobalt catalysts were tested in methane decomposition reaction at 450°C to evaluate their catalytic properties in non-oxidative methane conversion for hydrogen production via accumulation of carbon as mentioned in this paper.
References
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Journal ArticleDOI
Strong metal-support interactions. Group 8 noble metals supported on titanium dioxide
Journal ArticleDOI
Strong metal-support interactions: Occurrence among the binary oxides of groups IIA–VB
Samuel J. Tauster,S.C. Fung +1 more
TL;DR: In this paper, the authors discussed the need for a reducible, transition metal oxide support and on the basis of bonding mechanisms suggested by known compounds, showed that Iridium exhibits normal H2-chemisorption (typical of Ir Al 2 O 3 and Ir SiO 2 ) following reduction at 200 °C.
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Temperature-programmed reduction of CoOAI2O3 catalysts
P. Arnoldy,Jacob A. Moulijn +1 more
TL;DR: In this article, it was shown that temperature-programmed reduction (TPR) is a sensitive technique for the characterization of Co and Co-Aloxidic phases in CoOAl2O3 catalysts.
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Fischer-Tropsch synthesis on cobalt and ruthenium. Metal dispersion and support effects on reaction rate and selectivity
TL;DR: In this paper, metal dispersion and support effects on Fischer-Tropsch synthesis rate and selectivity were studied at conditions that favor the information of C5+ hydrocarbons (> 80% selectivity).
Journal ArticleDOI
The stoichiometries of H2 and CO adsorptions on cobalt: Effects of support and preparation
TL;DR: In this article, high temperature hydrogen adsorption and conventional 298 K adsorptions of hydrogen and carbon monoxide were characterized by unsupported cobalt and cobalt supported on silica, alumina, titania, magnesia, and carbon.