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    X-ray absorption, X-ray diffraction and electron microscopy study of spent cobalt based catalyst in semi-commercial scale Fischer–Tropsch synthesis
    Applied Catalysis A General (2014)
    Nikolaos E. TsakoumisRoya Dehghan‐NiriMagnus RønningJohn C. WalmsleyØyvind BorgErling RytterAnders Holmen
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    Keywords:
    XANES
    Fischer–Tropsch process
    Powder Diffraction
    Chemisorption
    Cobalt oxide
    Topics:
    Catalysts for Methane Reforming
    Catalytic Processes in Materials Science
    Electrocatalysts for Energy Conversion
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    99/00360 Process and catalysts for the Fischer-Tropsch preparation of hydrocarbons with increased C5 selectivity
    Fuel and Energy Abstracts (1999)
    Fischer–Tropsch process
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    Biomass‐to‐Liquids by the Fischer–Tropsch Process
    Erling RytterEsther Ochoa‐FernándezAdil Fahmi
    This chapter contains sections titled: Basics of Fischer–Tropsch Chemistry and BTL Cobalt Fischer–Tropsch Catalysis Fischer–Tropsch Reactors Biomass Pretreatment and Gasification Biomass-to-Liquids Process Concepts BTL Pilot and Demonstration Plants XTL Energy and Carbon Efficiencies BTL Summary and Outlook References
    Fischer–Tropsch process
    Gas to liquids
    Carbon fibers
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    Sensitive X-ray Absorption Near Edge Structure Analysis on the Bonding Properties of Au30(SR)18 Nanoclusters
    ACS Omega (2018)
    Rui YangDavid J. MorrisTatsuya HigakiMatthew J. WardRongchao Jin
    Au nanoclusters (NCs) with organothiolate protecting ligands are a field of great interest and X-ray absorption spectroscopy is a useful tool for the structure and property studies of these Au NCs. However, the Au NCs normally show broad and low-intensity features in the gold X-ray absorption near-edge structure (XANES) region, lowering the sensitivity of the technique and making it difficult to use for the analysis of Au NCs. In this work we report a sensitive gold L3-edge XANES study on the bonding properties of the newly discovered Au30(SR)18 NCs utilizing a combined approach of the first derivative XANES spectra and quantum simulations. First derivative XANES spectra are compared with the well-studied Au25(SR)18 with the aim of determining the unique features of Au30(SR)18. It is found that the early XANES region of the Au NCs is significantly influenced by the gold-gold bonding environment in the surface sites, as the varying surface Au-Au bond lengths in Au25(SR)18 and Au30(SR)18 result in pronounced difference in the first derivative XANES. These findings can be consistently explained using site-selective quantum simulations of the XANES spectra based on the Au NC structural models. The XANES method presented in this work offers a useful tool for the sensitive analysis on structure and bonding properties of Au NCs.
    XANES
    Nanoclusters
    Citations (11)
    96/00201 Ultrafine particles of cobalt as the catalyst for liquid phase Fischer-Tropsch synthesis
    Fuel and Energy Abstracts (1996)
    Fischer–Tropsch process
    Liquid phase
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    Aluminosilicate-supported cobalt catalysts in the Fischer-Tropsch synthesis
    Petroleum Chemistry (2009)
    А. Л. ЛапидусV. A. PavlovaН.К. ЧиньO. L. EliseyevV. V. Gushchin
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    Cerium oxide
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    Modification of cobalt catalyst selectivity according to fischer-tropsch process conditions
    Studies in surface science and catalysis (2007)
    Marie-Claire MarionF. Hugues
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    Study of XANES at the K Absorption Edge in Some 3d Compounds
    Springer series in chemical physics (1983)
    Shivani SaxenaH. S. ChauhanSatish ChandraK.B. Garg
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    Reactivities study of titanium sites in titanosilicate frameworks by in situ XANES
    Journal of Porous Materials (2016)
    Hong Khanh Dieu NguyenGopinathan SankarC. Richard A. Catlow
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    Comparision of performances of iron and cobalt in Fischer-Tropsch synthesis
    Huagong jinzhan (2012)
    Jianfang Cao
    This paper examines the Fischer-Tropsch technology for the biomass-to-clean fuels scenario.A comparison of the activities,selectivities and lifetimes of iron and cobalt catalysts for Fischer-Tropsch synthesis is made.For the more severe conditions,iron is the more active catalyst,whereas a cobalt catalyst may be more active at low severity conditions.In spite of many reports,there are still considerable differences in defining catalyst activity.The selectivity for methane likewise shows a wide range of reported results.Under the proper conditions,both catalysts are capable of operating for 6 months or more.
    Fischer–Tropsch process
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    95/05825 XPS study of iron catalysts for Fischer-Tropsch synthesis
    Fuel and Energy Abstracts (1995)
    Fischer–Tropsch process
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