| Pd-SiW12/SiO2催化乙烯气相直接氧化制乙酸:SiO2孔结构的影响 |
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| 引用本文： | 徐庶亮,王丽霞,楚文玲,杨维慎.Pd-SiW12/SiO2催化乙烯气相直接氧化制乙酸:SiO2孔结构的影响[J].催化学报,2009,30(10). |
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| 作者姓名： | 徐庶亮 王丽霞 楚文玲 杨维慎 |
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| 作者单位： | 1. 中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁,大连,116023;中国科学院研究生院,北京,100049
2. 中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁,大连,116023 |
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| 基金项目： | 国家杰出青年基金，国家重点基础研究发展计划 |
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| 摘 要： | 采用二三种不同孔结构的Si02制备了Pd-SiW12/SiO2催化剂,通过x射线衍射、N2物理吸附、吡啶吸附红外光谱以及H2脉冲化学吸附对催化剂进行了表征,并考察了Pd-SiW12/SiO2催化剂上乙烯直接氧化制乙酸反应性能.结果表明,以孔径较大的粗孔硅胶为载体制备的Pd-SiW12/SiO2催化剂显示出最高的催化活性,乙酸收率为145.2g/(L·h).这是由于Pd在粗孔硅胶载体表面良好的分散使其具有较高的催化活性.
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| 关 键 词： | 钯 硅钨酸 硅胶 乙烯 氧化 乙酸 |
Effect of Pore Structure of SiO2 on Catalytic Performance of Pd-SiW12/SiO2 for Direct Oxidation of Ethylene to Acetic Acid |
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| XU Shuliang,WANG Lixia,CHU Wenling,YANG Weishen.Effect of Pore Structure of SiO2 on Catalytic Performance of Pd-SiW12/SiO2 for Direct Oxidation of Ethylene to Acetic Acid[J].Chinese Journal of Catalysis,2009,30(10). |
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| Authors: | XU Shuliang WANG Lixia CHU Wenling YANG Weishen |
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| Institution: | XU Shuliang1,2,WANG Lixia1,CHU Wenling1,YANG Weishen1,1State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China 2Graduate University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | The Pd-SiW_(12)/SiO_2 catalysts with different pore structure of SiO_2 were prepared for direct oxidation of ethylene to acetic acid. The catalysts were characterized by X-ray diffraction, N2 physical adsorption, infrared spectroscopy of adsorbed pyridine, and H_2-pulse chemical adsorption. The results showed that the pore structure of SiO_2 had an important influence on the catalytic performance of the catalysts. The Pd-SiW_(12)/SiO_2 catalyst prepared by the SiO_2 support with larger pore size and pore distribution exhibited the highest catalytic activity, on which 145.2 g/(L·h) of acetic acid yield was obtained. Pd dispersion was responsible for the catalytic activity of the Pd-SiW_(12)/SiO_2 catalyst. |
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| Keywords: | palladium silicotungstic acid silica ethylene oxidation acetic acid |
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