| 后处理温度对Sol-Gel法制备的镍基负载型催化剂性能的影响 |
| INFLUENCE OF CALCINATION TEMPERATURE ON THE PROPERTIES OF ULTRAFINE SUPPORTED NICKEL CATALYST |
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| 摘要: 以正硅酸乙酯、钛酸丁酯、硝酸镍为原料，用Sol-Gel法制备得到超细镍基负载型催化剂前体NiO/TiO2-SiO2。采用BET、UV-Vis、FT-IR 、XRD、TPR等方法，研究了焙烧温度对催化剂前体物化性能及其催化剂活性（苯加氢生成环已烷反应）的影响。结果表明：用Sol-Gel 法制备得到的NiO/TiO2-SiO2的织构具有较高的热稳定性。随着焙烧温度的升高，比表面积、孔体积略有减少，表观堆密度增大。焙烧至92 |
| 关键词: 溶胶-凝胶法 镍基 TiO2-SiO2 焙烧温度 |
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| Abstract: The effects of calcination temperature on the physical and chemical properties and benzene hyarogenation activities of NiO/TiO2-SiO2 catalyst precursors were investigated by BET、UV-Vis、FT-IR、XRD、TPD techniques. The precursors were prepared by sol-gel method with tetraethyl silicate、butyl titanate and zirconium nitrate. The results show that the heat resistance of the NiO/TiO2-SiO2 texture was very high. The apparent density increased with the increase of calcination temperature, while the surface area and pore volume decreased little. The surface area and pore volume still keep very high(SBET=340.17 m2·g-1, VPN=0.206 cm3·g-1) as calcinating to 923K.The calcination temperature had great influence on the NiO complexation and the crystal structure. NiO microcrystalline sizes and the interaction of NiO and support increased with the increase of calcination temperature,but it had little influence on the activities of catalyst in the range of 623～923K.Some of NiO microcrystal will turn into NiTiO3 microcrystal when the calcination temperature is high to 1023K. With the change of the crystal structure, the activities of catalyst decreased. |
| Keywords: Sol-Gel nickel TiO2-SiO2 calcination temperature |
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| 朱毅青,王占华,吴泽彪,赖梨芳,林西平.后处理温度对Sol-Gel法制备的镍基负载型催化剂性能的影响[J].无机化学学报,1999,15(6):785-792. |
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