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  1. No Access

    Article

    Fischer–Tropsch Synthesis: XANES Spectra of Potassium in Promoted Precipitated Iron Catalysts as a Function of Time On-stream

    XANES K-edge spectra of potassium promoter in precipitated Fe catalysts were acquired following activation by carburization in CO and as a function of time on-stream during the course of a Fischer–Tropsch synt...

    Gary Jacobs, Venkat Ramana Rao Pendyala, Michela Martinelli… in Catalysis Letters (2017)

  2. No Access

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    Fischer–Tropsch Synthesis: XANES Investigation of Hydrogen Chloride Poisoned Iron and Cobalt-Based Catalysts at the K-Edges of Cl, Fe, and Co

    The effect of co-fed hydrogen chloride (HCl) in syngas on the performance of iron and cobalt-based Fischer–Tropsch (FT) catalysts was investigated in our earlier studies (Ma et al. in ACS Catal 5:3124–3136, 2015;...

    Venkat Ramana Rao Pendyala, Gary Jacobs, Wen** Ma, Dennis E. Sparks… in Catalysis Letters (2016)

  3. No Access

    Article

    Effect of H2S in Syngas on the Fischer–Tropsch Synthesis Performance of a 0.5%Pt–25%Co–Al2O3 Catalyst

    The effect of 1.0 ppm H2S in the syngas feed on initial activity and selectivity of a 0.5%Pt–25%Co/Al2O3 catalyst was studied by comparing the catalyst performance under H2S and sulfur free conditions. The reacti...

    Wen** Ma, Gary Jacobs, Wilson D. Shafer, Venkat Ramana Rao Pendyala… in Catalysis Letters (2016)

  4. No Access

    Article

    Isotopic Apportioning of Hydrogen/Deuterium on the Surface of an Activated Iron Carbide Catalyst

    Fischer–Tropsch (FT) synthesis continues to receive widespread attention. Even after 90 years of investigation, the mechanistic route has yet to be fully defined. FT, as a polymerization process, uses CO and H2 a...

    Wilson D. Shafer, Venkat Ramana Rao Pendyala, Muthu Kumaran Gnanamani… in Catalysis Letters (2015)

  5. No Access

    Article

    14C-Labeled Alcohol Tracer Study: Comparison of Reactivity of Alcohols over Cobalt and Ruthenium Fischer–Tropsch Catalysts

    The reactivity of 14C-labeled ethanol (CH 3 14 CH2OH) and 1-propanol (CH3CH 2 14 CH2OH) added during Fischer...

    Muthu Kumaran Gnanamani, Wilson D. Shafer… in Topics in Catalysis (2015)

  6. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Reducing Agent for Aqueous-Phase Synthesis Over Ru Nanoparticle and Supported Ru Catalysts

    The effect of the reducing agent on the performance of a ruthenium nanoparticle catalyst was investigated during aqueous-phase Fischer–Tropsch synthesis using a 1 L stirred tank reactor in the batch mode of op...

    Venkat Ramana Rao Pendyala, Wilson D. Shafer, Gary Jacobs… in Catalysis Letters (2015)

  7. 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)

  8. 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)

  9. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Halides and Potassium Addition on Activity and Selectivity of Cobalt

    The effect of halides and potassium addition on cobalt Fischer–Tropsch synthesis (FTS) was studied using 1L CSTR at 493 K, 1.99 MPa and H2/CO of 2.0. The potential catalyst poison was co-fed with syngas after rea...

    Muthu Kumaran Gnanamani, Venkat Ramana Rao Pendyala, Gary Jacobs… in Catalysis Letters (2014)

  10. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Reaction Temperature for Aqueous-Phase Synthesis Over a Platinum Promoted Co/Alumina Catalyst

    The effect of reaction temperature on the performance of a traditional Fischer–Tropsch cobalt catalyst (0.5 % Pt–25 % Co/Al2O3) was investigated during aqueous-phase Fischer–Tropsch synthesis (AFTS) using a 1 L s...

    Venkat Ramana Rao Pendyala, Wilson D. Shafer, Gary Jacobs… in Catalysis Letters (2014)

  11. Article

    Erratum to: Fischer–Tropsch Synthesis: Studies on the Effect of Support Do** with Si, Mn and Cr on the Selectivity to Alcohols in Ceria Supported Cobalt Catalysts

    Mauro C. Ribeiro, Muthu K. Gnanamani, Israel R. Azevedo… in Topics in Catalysis (2014)

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  12. No Access

    Article

    Fischer–Tropsch Synthesis: Oxidation of a Fraction of Cobalt Crystallites in Research Catalysts at the Onset of FT at Partial Pressures Mimicking 50 % CO Conversion

    Freshly H2-reduced catalyst samples and FTS catalyst samples (i.e., freshly reduced and immediately exposed to the onset of FTS conditions corresponding to 50 % CO conversion) were prepared. Each sample was coate...

    Thani Jermwongratanachai, Gary Jacobs, Wilson D. Shafer, Wen** Ma… in Topics in Catalysis (2014)

  13. No Access

    Article

    Fischer–Tropsch Synthesis: Deuterium Kinetic Isotopic Effect for a 2.5 % Ru/NaY Catalyst

    The isotopic effect of D2 was investigated for a 2.5 % Ru/NaY catalyst for Fischer–Tropsch synthesis at industrially relevant conditions (493 K, 1.92 MPa, H2/CO = 2). An inverse kinetic isotopic effect was found ...

    Jia Yang, Wilson D. Shafer, Venkat Ramana Rao Pendyala, Gary Jacobs… in Topics in Catalysis (2014)

  14. No Access

    Article

    Fischer–Tropsch Synthesis: Using Deuterium as a Tool to Investigate Primary Product Distribution

    Accumulation of products is a known phenomenon associated with a continuously stirred tank reactor (CSTR). Secondary reactions of α-olefins due to prolonged bed/pore residence time can significantly change the...

    Jia Yang, Wilson D. Shafer, Venkat Ramana Rao Pendyala, Gary Jacobs… in Catalysis Letters (2014)

  15. No Access

    Article

    Fischer–Tropsch Synthesis: Impact of H2 or CO Activation on Methane Selectivity

    The effect of CO conversion on methane selectivity of a 10 % Co/TiO2 catalyst was investigated using a 1L continuously stirred tank reactor at 493–503 K, 2.4 MPa, H2/CO = 2 and GHSV = 0.4–6 Nl g ...

    Jia Yang, Gary Jacobs, Thani Jermwongratanachai… in Catalysis Letters (2014)

  16. No Access

    Article

    Aqueous-Phase Fischer–Tropsch Synthesis: Effect of Reaction Temperature on Ruthenium Nanoparticle Catalyst and Comparison with Supported Ru and Co Catalysts

    The effect of reaction temperature on the performance of a ruthenium nanoparticle catalyst was investigated during aqueous-phase Fischer–Tropsch synthesis using a 1 L stirred tank reactor in the batch mode of ...

    Venkat Ramana Rao Pendyala, Wilson D. Shafer, Burtron H. Davis in Catalysis Letters (2013)

  17. No Access

    Article

    Fischer–Tropsch Synthesis: Effect of Start-Up Solvent in a Slurry Reactor

    The effect of start-up solvent on the performance of cobalt-based catalysts and potassium-promoted precipitated iron catalysts was investigated during Fischer–Tropsch (FT) synthesis by using a continuously sti...

    Venkat Ramana Rao Pendyala, Gary Jacobs, Mingsheng Luo… in Catalysis Letters (2013)

  18. No Access

    Article

    Low-Temperature Water–Gas Shift: Do** Ceria Improves Reducibility and Mobility of O-Bound Species and Catalyst Activity

    A series of platinum loaded catalysts supported on cation (Me)-doped cerium dioxide (Me = Ba, La, Y, Hf and Zn) was prepared by co-precipitation of the Me-nitrates and impregnation of a Pt precursor. Low tempe...

    Linda Z. Linganiso, Venkat Ramana Rao Pendyala, Gary Jacobs… in Catalysis Letters (2011)

  19. 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)

  20. No Access

    Article

    Studies on KIT-6 Supported Cobalt Catalyst for Fischer–Tropsch Synthesis

    KIT-6 molecular sieve was used as a support to prepare cobalt catalyst for Fischer–Tropsch synthesis (FTS) using an incipient wetness impregnation method to produce cobalt loadings of 15 and 25 wt%. The cataly...

    Muthu Kumaran Gnanamani, Gary Jacobs, Uschi M. Graham, Wen** Ma… in Catalysis Letters (2010)