在纽兰德催化体系中，双金属Zr/Cu催化剂催化乙炔二聚生成单乙烯基乙炔（MVA）。
Dimerization of Acetylene to Monovinylacetylene (MVA) by Bimetallic Zr/Cu Catalyst in Nieuwland Catalytic System.
作者信息
Zheng Leng, Lin Ruolin, Luo Dingjie, Guo Liang, Zhang Jinli
机构信息
School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
出版信息
Molecules. 2022 Jan 18;27(3):602. doi: 10.3390/molecules27030602.
Nieuwland catalyst is a key step in the dimerization of acetylene. Various zirconium metal additives incorporating Nieuwland catalysts were prepared, and their catalytic performances were assessed in acetylene dimerization. Different characterization techniques (i.e., thermogravimetric analysis, temperature-programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy, hydrogen ion concentration measurement and transmission electron microscopy) were employed in this study. The best catalytic performance was obtained over zirconium-acetylacetonate-incorporated Nieuwland catalysts, with an acetylene conversion of 53.3% and a monovinylacetylene selectivity of 87.4%. Based on these results, the zirconium acetylacetonate additive could reduce the types of transition state complexes, and it could also change the morphology of the catalyst. In addition, the additives could significantly inhibit the occurrence of trimerization products and polymers. Hence, the conversion of acetylene, monovinylacetylene selectivity, and stability of the Nieuwland catalysts were enhanced.
纽兰德催化剂是乙炔二聚反应的关键步骤。制备了各种含有纽兰德催化剂的锆金属添加剂，并在乙炔二聚反应中评估了它们的催化性能。本研究采用了不同的表征技术（即热重分析、程序升温还原、X射线衍射、X射线光电子能谱、氢离子浓度测量和透射电子显微镜）。在含有乙酰丙酮锆的纽兰德催化剂上获得了最佳催化性能，乙炔转化率为53.3%，单乙烯基乙炔选择性为87.4%。基于这些结果，乙酰丙酮锆添加剂可以减少过渡态络合物的种类，还可以改变催化剂的形态。此外，添加剂可以显著抑制三聚产物和聚合物的生成。因此，提高了纽兰德催化剂的乙炔转化率、单乙烯基乙炔选择性和稳定性。
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