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中文摘要：
通过碱液回流老化法制备出了2种高比表面积的ZrO2载体（ZrO2-NaOH、ZrO2-NH4OH），采用溶胶-凝胶法制备出2种ZrO2-SiO2复合载体（ZS-1、ZS-2），并将其负载钴制备出了负载量为10％（质量分数，ω）钴基费-托合成催化剂（Co／ZrO2-NaOH、Co／ZrO2-NH4OH、Co／ZS-1和Co／ZS-2）．采用N2吸附-脱附、X-射线衍射、程序升温还原和程序升温脱附、氧滴定等手段对催化剂进行了表征，催化剂活性测试在微型固定床反应器上进行．结果表明：碱液回流老化后可显著提高ZrO2的比表面积和热稳定性，NH4OH回流制得的ZrO2载体平均孔径比NaOH回流的ZrO2载体大．由其制得的钴基催化剂费-托合成活性最高，证明载体的孔结构显著影响催化剂的反应性能．复合载体制备的钴催化剂10Co／ZS-1、10Co／ZS-2展示较低的CO2、CH4选择性和较高的C5＋选择性．
英文摘要：
Two zirconia samples with high surface areas were prepared by refluxing digestion method. Two ZrO2- SiO2 complex oxide samples were also prepared by sol-gel mothod. The 10 wt.% cobalt catalysts supported on these supports were prepared by incipient wetness impregnation and characterized by various techniques, including N2 adsorption-desorption, X-ray diffraction, temperature-programmed reduction, temperature-programmed desorption and oxygen titration. The results are as follows： The digestion in basic solutions remarkably increases the specific surface area and thermal stability of zireonia. The average pore size of ZrO2 obtained by refluxing of NH4OH was larger than that with NaOH. The catalyst with pore size of 8-10 nm displayed the highest FT activity. It proved that the support porosity influenced strongly the FT catalytic performance. The cobalt catalysts supported on by zirconia-silica complex oxide showed lower CO2 and CH4 selectivity, higher C5＋ selectivity and higher heavy hydrocarbon selectivity.
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