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<p>The anaerobic dehydrogenation of dodecanol to dodecanal has been investigated in a continuous fixed bed reactor over a series of Cu-based catalysts with different supports (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, ZnO and MgO). These catalysts have been systematically characterized by XRD, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, CO<sub>2</sub>-TPD, XPS and N<sub>2</sub> adsorption/desorption measurements. And the results indicate that the support has significant effect on the physicochemical properties of the catalysts and their catalytic performances, and Cu/SiO<sub>2</sub> exhibited the highest catalytic activity in the dehydrogenation. Synergistic effect between Cu<sup>+</sup> and Cu<sup>0</sup> species has been observed, and proper ratio of Cu<sup>+</sup>/Cu<sup>0</sup> is believed to be able to improve the catalytic performance of Cu-based catalysts. The surface acidity and basicity demonstrate significant effect on the distribution of the products and the selectivity to aldehyde. Under the optimized conditions, an 82.3% conversion of dodecanol with an excellent 98.9% selectivity toward dodecanal could be obtained. Moreover, the catalytic performance of Cu/SiO<sub>2</sub> kept almost steady in 200&#xa0;h, indicating its good stability and application potential in the dehydrogenation process.</p>

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Efficient dehydrogenation of dodecanol to dodecanal in a continuous fixed bed reactor over supported Cu catalyst

  • 期刊论文

  • 发表日期：

    2025年1月28日

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  • Shanshan Cao,
  • Zhong Wu,
  • Weiyou Zhou,
  • Zhonghua Sun,
  • Junfeng Qian,
  • Mingyang He,
  • Qun Chen

摘要

The anaerobic dehydrogenation of dodecanol to dodecanal has been investigated in a continuous fixed bed reactor over a series of Cu-based catalysts with different supports (SiO2, Al2O3, ZnO and MgO). These catalysts have been systematically characterized by XRD, H2-TPR, NH3-TPD, CO2-TPD, XPS and N2 adsorption/desorption measurements. And the results indicate that the support has significant effect on the physicochemical properties of the catalysts and their catalytic performances, and Cu/SiO2 exhibited the highest catalytic activity in the dehydrogenation. Synergistic effect between Cu+ and Cu0 species has been observed, and proper ratio of Cu+/Cu0 is believed to be able to improve the catalytic performance of Cu-based catalysts. The surface acidity and basicity demonstrate significant effect on the distribution of the products and the selectivity to aldehyde. Under the optimized conditions, an 82.3% conversion of dodecanol with an excellent 98.9% selectivity toward dodecanal could be obtained. Moreover, the catalytic performance of Cu/SiO2 kept almost steady in 200 h, indicating its good stability and application potential in the dehydrogenation process.