Gang Guan , FengYun Ma , Ping Luo , XiaoLin Zhang , XiaoDing Li , GuangXing Li
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引用次数: 0
摘要
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。
Preparation of CuO-Bi2O3/SiO2@TiO2 core-shell structured catalysts and its catalytic performance for synthesis of 1, 4-butynediol by ethynylation of formaldehyde
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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