Preparation of CuO-Bi2O3/SiO2@TiO2 core-shell structured catalysts and its catalytic performance for synthesis of 1, 4-butynediol by ethynylation of formaldehyde

IF 3.4 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Communications Pub Date : 2024-02-01 DOI:10.1016/j.catcom.2024.106889

Gang Guan , FengYun Ma , Ping Luo , XiaoLin Zhang , XiaoDing Li , GuangXing Li

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Abstract

CuO-Bi₂O₃/SiO₂@TiO₂ core-shell structured catalysts were prepared by stepwise precipitation method and used for the synthesis of 1, 4-butynediol (BYD) by the ethynylation of formaldehyde. The characterization results, by XRD, BET, SEM, TEM, TPD etc., revealed the TiO₂ content not only affecting the surface area of the catalysts and the partical size of the loaded CuO, but also affecting the electronic interactions with CuO. The activity tests showed that the catalyst with 20% TiO₂ calcined at 450 °C had a short activation time, with good activity with conversion 91% and BYD yield 73% after 6 h on line. The catalysts still maintained good catalytic activity and stability after 6 repeated uses. ICP data indicate that leaching of Cu active component after reaction is very low.

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CuO-Bi2O3/SiO2@TiO2 核壳结构催化剂的制备及其在甲醛乙炔化合成 1，4-丁炔二醇中的催化性能

采用分步沉淀法制备了 CuO-BiO/SiO@TiO 核壳结构催化剂，并将其用于甲醛乙炔化反应合成 1，4-丁炔二醇（BYD）。XRD、BET、SEM、TEM、TPD 等表征结果表明，TiO 含量不仅会影响催化剂的表面积和负载 CuO 的粒径，还会影响与 CuO 的电子相互作用。活性测试表明，含 20% TiO 的催化剂在 450 °C 煅烧时活化时间短，活性好，上线 6 小时后转化率达 91%，比亚迪收率达 73%。重复使用 6 次后，催化剂仍保持良好的催化活性和稳定性。ICP 数据表明，反应后 Cu 活性组分的浸出率非常低。

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来源期刊

Catalysis Communications 化学-物理化学

CiteScore

6.20

自引率

2.70%

发文量

183

审稿时长

46 days

期刊介绍： Catalysis Communications aims to provide rapid publication of significant, novel, and timely research results homogeneous, heterogeneous, and enzymatic catalysis.