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<p>The hydrogenation of methyl oleate (C18:1) over vanadium-supported Pd was studied in the liquid phase under hydrogen pressure (1.0&#xa0;atm). The hydrogenated product methyl stearate (C18:0) was obtained in good yields which are well-known precursors for the synthesis of long-chain alkanes (jet fuels). The catalytic activity of Pd/V<sub>2</sub>O<sub>5</sub> is independent of the nature of the alkyl chain, the presence of a number of double bonds, and the source of fatty acids of methyl esters. The potentiality of Pd/V<sub>2</sub>O<sub>5</sub> catalyst has been also studied in the hydrogenation of poly-unsaturated fatty acid esters from methyl linoleate, <i>micro alga</i>, soybean oil, and olive oil resulting in complete hydrogenation without effecting ester groups in excellent yields. During the process of hydrogenation of methyl oleate, isomerization of <i>cis–trans</i> was negligible, (1.56% of <i>cis–trans</i>) even at 70 ℃ in hexane. Both oxidation states of support vanadium (V<sup>5+</sup>, V<sup>4+</sup>) and noble metals Pd<sup>2+</sup> and Pd<sup>0</sup> play a key role in this reaction under heterogeneous conditions.</p>

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Hydrogenation of biomass-derived fatty acid esters and Dunaliella salina catalyzed by Pd on V2O5

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Manisha Pandey,
  • Akanksha Rai,
  • Nitesh Prasad,
  • Abhishek Mohanta,
  • Ravi Kumar Asthana,
  • Kalluri V. S. Ranganath

摘要

The hydrogenation of methyl oleate (C18:1) over vanadium-supported Pd was studied in the liquid phase under hydrogen pressure (1.0 atm). The hydrogenated product methyl stearate (C18:0) was obtained in good yields which are well-known precursors for the synthesis of long-chain alkanes (jet fuels). The catalytic activity of Pd/V2O5 is independent of the nature of the alkyl chain, the presence of a number of double bonds, and the source of fatty acids of methyl esters. The potentiality of Pd/V2O5 catalyst has been also studied in the hydrogenation of poly-unsaturated fatty acid esters from methyl linoleate, micro alga, soybean oil, and olive oil resulting in complete hydrogenation without effecting ester groups in excellent yields. During the process of hydrogenation of methyl oleate, isomerization of cis–trans was negligible, (1.56% of cis–trans) even at 70 ℃ in hexane. Both oxidation states of support vanadium (V5+, V4+) and noble metals Pd2+ and Pd0 play a key role in this reaction under heterogeneous conditions.