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<p>A porous carbon material (PCM) and series of porous cobalt-carbon composite materials (PCoCCMs) with different metal content have been synthesized by dehydrochlorination of polyvinyl chloride and mixtures of Co(NO<sub>3</sub>)<sub>2</sub> with polyvinyl chloride, respectively, followed by carbonization and activation in CO<sub>2</sub> flow at temperatures of 673 and 1173&#xa0;K. These materials were used to obtain supported palladium catalysts. The effect of cobalt content on catalytic performance in the reaction of liquid-phase hydrogenation of <i>n</i>-pentanal was analyzed. It was found that all Pd/PCoCCMs samples with cobalt content of 18.5–64.2 wt%, with a minimum micropore number of 52–66% and that of surface acidic groups of 0.05–0.15&#xa0;mmol&#xa0;g<sup>−1</sup> are more active than the Pd/PCM sample with a maximum micropore number of 88% and that of surface acidic groups of 0.30&#xa0;mmol&#xa0;g<sup>−1</sup>. The highest <i>n</i>-pentanal conversion of 96 wt% and 70 wt% selectivity to 1−pentanol was obtained for a catalyst with cobalt content of 25.3 wt% at reaction time of 6&#xa0;h, temperature of 353&#xa0;K, and hydrogen pressure of 1.0&#xa0;MPa. A multi-cycle experimental study of the catalyst showed its reduced activity and increased selectivity to the products of acetalization, self-condensation and etherification. In general, the results obtained open up prospects for creating catalysts based on the available synthetic organic raw material.</p>

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Palladium catalysts on porous cobalt-carbon composite materials derived from PVC for n-pentanal hydrogenation

  • 期刊论文

  • 发表日期：

    2025年4月5日

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  • Yu. A. Chumachenko,
  • E. R. Saybulina,
  • I. V. Muromtsev,
  • T. I. Gulyaeva,
  • M. V. Trenikhin,
  • O. V. Gorbunova,
  • E. A. Raiskaya,
  • O. B. Belskaya

摘要

A porous carbon material (PCM) and series of porous cobalt-carbon composite materials (PCoCCMs) with different metal content have been synthesized by dehydrochlorination of polyvinyl chloride and mixtures of Co(NO3)2 with polyvinyl chloride, respectively, followed by carbonization and activation in CO2 flow at temperatures of 673 and 1173 K. These materials were used to obtain supported palladium catalysts. The effect of cobalt content on catalytic performance in the reaction of liquid-phase hydrogenation of n-pentanal was analyzed. It was found that all Pd/PCoCCMs samples with cobalt content of 18.5–64.2 wt%, with a minimum micropore number of 52–66% and that of surface acidic groups of 0.05–0.15 mmol g−1 are more active than the Pd/PCM sample with a maximum micropore number of 88% and that of surface acidic groups of 0.30 mmol g−1. The highest n-pentanal conversion of 96 wt% and 70 wt% selectivity to 1−pentanol was obtained for a catalyst with cobalt content of 25.3 wt% at reaction time of 6 h, temperature of 353 K, and hydrogen pressure of 1.0 MPa. A multi-cycle experimental study of the catalyst showed its reduced activity and increased selectivity to the products of acetalization, self-condensation and etherification. In general, the results obtained open up prospects for creating catalysts based on the available synthetic organic raw material.