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  1. No Access

    Article

    Kinetics of ordering in metallic alloys

    Electrical, magnetic, and mechanical properties of metallic alloys depend on their state of chemical order. The systematic perturbations of57Fe hyper-fine magnetic fields by solute atoms near57Fe atoms can be use...

    Brent Fultz, Hussein H. Hamdeh in Hyperfine Interactions (1989)

  2. No Access

    Article

    Fischer–Tropsch Synthesis: Changes in Phase and Activity During Use

    Four iron catalysts (unpromoted, K-promoted, Si-promoted and K,Si-promoted) were activated and subjected to common Fischer–Tropsch synthesis conditions. At increasing times on stream, samples were withdrawn fr...

    Nathila Sirimanothan, Hussein H. Hamdeh, Yongqing Zhang… in Catalysis Letters (2002)

  3. No Access

    Article

    Fischer–Tropsch Synthesis: Morphology, Phase Transformation and Particle Size Growth of Nano-scale Particles

    An unpromoted ultrafine iron nano-particle catalyst was used for Fischer–Tropsch synthesis (FTS) in a CSTR at 270 °C, 175 psig, H2/CO = 0.7, and a syngas space velocity of 3.0 sl/h/g Fe. Prior to FTS, the catalys...

    Amitava Sarkar, Deepyaman Seth, Alan K. Dozier, James K. Neathery… in Catalysis Letters (2007)

  4. No Access

    Article

    Fischer–Tropsch Synthesis: Characterization Rb Promoted Iron Catalyst

    Rubidium promoted iron Fischer–Tropsch synthesis (FTS) catalysts were prepared with two Rb/Fe atomic ratios (1.44/100 and 5/100) using rubidium nitrate and rubidium carbonate as rubidium precursors. Results of...

    Amitava Sarkar, Gary Jacobs, Yaying Ji, Hussein H. Hamdeh… in Catalysis Letters (2008)

  5. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Water Over Iron-Based Catalysts

    The effect of water on the performance of potassium-promoted precipitated iron catalyst was investigated during Fischer–Tropsch synthesis (FTS) using a continuously stirred tank reactor (CSTR) at two different...

    Venkat Ramana Rao Pendyala, Gary Jacobs, Janet C. Mohandas… in Catalysis Letters (2010)

  6. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Potassium on Activity and Selectivity for Oxide and Carbide Fe Catalysts

    The effect of potassium on oxides and carbides of iron for Fischer–Tropsch synthesis (FTS) was investigated by pretreating Fe3O4 and K-promoted Fe catalysts with different gases (H2/H2O and CO). A freshly activat...

    Muthu Kumaran Gnanamani, Hussein H. Hamdeh, Wilson D. Shafer… in Catalysis Letters (2013)

  7. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Activation Gas After Varying Cu Promoter Loading Over K-Promoted Fe-Based Catalyst

    The effects of activation gas and copper promoter loading on the Fischer–Tropsch synthesis performance of potassium promoted precipitated iron-based catalysts were investigated using a continuously stirred tan...

    Venkat Ramana Rao Pendyala, Gary Jacobs, Hussein H. Hamdeh… in Catalysis Letters (2014)

  8. No Access

    Article

    Fischer–Tropsch Synthesis: Deactivation as a Function of Potassium Promoter Loading for Precipitated Iron Catalyst

    The effect of potassium promoter loading (0, 0.5, 1.0 and 2.0 atomic ratio) on the performance of precipitated iron catalysts was investigated during Fischer–Tropsch synthesis using a continuously stirred tank...

    Venkat Ramana Rao Pendyala, Uschi M. Graham, Gary Jacobs… in Catalysis Letters (2014)

  9. No Access

    Article

    Effect of Gallium Additions on Reduction, Carburization and Fischer–Tropsch Activity of Iron Catalysts

    Undoped and gallium-doped iron oxide catalysts (100Fe, 100Fe:2Ga, and 100Fe:5Ga) were prepared by following a continuous co-precipitation technique using ammonium hydroxide as precipitant. The catalysts were c...

    Charles Beasley, Muthu Kumaran Gnanamani, Hussein H. Hamdeh… in Catalysis Letters (2018)