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Conversion of Triglycerides to Hydrocarbons Over Supported Metal Catalysts

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Abstract

The deoxygenation of triglycerides (tristearin, triolein and soybean oil) under nitrogen atmosphere was investigated over 20 wt% Ni/C, 5 wt% Pd/C and 1 wt% Pt/C catalysts. Use of the Ni catalyst resulted in near quantitative conversion of the triglyceride in each case, high yields of linear C5 to C17 alkanes and alkenes being obtained. Oxygen was rejected as CO and CO2, while small amounts of light alkanes (C1–C4) and H2 were also formed. 13C NMR spectroscopic analysis of the liquid product from soybean oil deoxygenation at intermediate reaction times suggested that one pathway for triglyceride deoxygenation involves liberation of fatty acids via C–O bond scission and concomitant H transfer, followed by elimination of CO2 from the acids in a later step. Compared to Ni, catalysts containing Pd or Pt supported on activated carbon showed lower activity for both triglyceride deoxygenation and for cracking of the fatty acid chains.

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Acknowledgements

The authors thank Rolando Gonzalez for performing the N2 physisorption measurements, and Owensboro Grain for a gift of soybean oil.

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Authors and Affiliations

  1. Center for Applied Energy Research, University of Kentucky, 2540 Research Park Drive, Lexington, KY, 40511, USA

    Tonya Morgan, Daniel Grubb, Eduardo Santillan-Jimenez & Mark Crocker

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  1. Tonya Morgan
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  2. Daniel Grubb
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  3. Eduardo Santillan-Jimenez
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  4. Mark Crocker
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Correspondence to Mark Crocker.

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Morgan, T., Grubb, D., Santillan-Jimenez, E. et al. Conversion of Triglycerides to Hydrocarbons Over Supported Metal Catalysts. Top Catal 53, 820–829 (2010). https://doi.org/10.1007/s11244-010-9456-1

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  • DOI: https://doi.org/10.1007/s11244-010-9456-1

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