| 氮气气氛下焙烧的CeO_2载体负载Ni基催化剂的顺酐加氢性能研究 |
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| 引用本文： | 廖欣,张因,李海涛,赵丽丽,张鸿喜,赵永祥.氮气气氛下焙烧的CeO_2载体负载Ni基催化剂的顺酐加氢性能研究[J].分子催化,2017,31(1):53-60. |
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| 作者姓名： | 廖欣 张因 李海涛 赵丽丽 张鸿喜 赵永祥 |
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| 作者单位： | 山西大学化学化工学院,精细化学品教育部工程研究中心,山西太原030006 |
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| 基金项目： | 国家自然科学基金青年科学基金项目(21303097) |
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| 摘 要： | 在氮气气氛中合成了具有较高氧缺陷浓度的CeO_2载体,采用浸渍法制备了Ni含量为10%的Ni/CeO_2-N催化剂,考察了其顺酐液相加氢性能,并与氧气气氛中制得的CeO_2载体负载Ni催化剂作了对比.N_2低温物理吸脱附,X-射线衍射,拉曼光谱,H_2程序升温还原等表征手段表明,在氮气气氛中合成的CeO_2具有较高浓度的氧缺陷位,在催化剂还原过程中可促进NiO物种的还原,同时在催化剂表面生成更多的氧缺陷位.该氧缺陷位可与活性金属Ni物种协同作用,显著提高催化剂的C=C及C=O加氢活性.
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| 关 键 词： | CeO2载体 Ni/CeO2催化剂 氧缺陷位 加氢 顺酐 |
| 收稿时间： | 2017/1/23 0:00:00 |
| 修稿时间： | 2017/2/11 0:00:00 |
CeO2 Prepared in N2 Atmosphere and Supported Ni-based Catalyst for Hydrogenation of Maleic Anhydride |
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| LIAO Xin,ZHANG Yin,LI Hai-tao,ZHAO Li-li,ZHANG Hong-xi and ZHAO Yong-xiang.CeO2 Prepared in N2 Atmosphere and Supported Ni-based Catalyst for Hydrogenation of Maleic Anhydride[J].Journal of Molecular Catalysis (China),2017,31(1):53-60. |
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| Authors: | LIAO Xin ZHANG Yin LI Hai-tao ZHAO Li-li ZHANG Hong-xi and ZHAO Yong-xiang |
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| Institution: | Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University,Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University,Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University,Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University,Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University |
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| Abstract: | Two kinds of CeO2 supports were prepared by calcining Ce(NO3)3 6H2O in N2 (CeO2-N) and O2 (CeO2-O) atmosphere. The Ni/CeO2-N and Ni/CeO2-O catalysts synthesized via impregnation method were employed for liquid phase hydrogenation of maleic anhydride(MA). Combined with N2 adsorption-desorption, X-ray diffraction, Raman scattering, H2-temperature programmed reduction, it is demonstrated that the CeO2-N support possessed more oxygen vacancies, which promoted NiO reducibility and strengthen Ni-CeO2 interaction in comparison with Ni/CeO2-O catalyst. The superior catalytic performance of MA hydrogenation over Ni/CeO2-N catalyst to that over Ni/CeO2-O catalyst was attributed to abundant oxygen vacancies, which synergistically enhanced the capability of Ni in C=C hydrogenation and C=O hydrogenolysis. |
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| Keywords: | CeO2 support Ni supported catalyst Oxygen vacancies Hydrogenation Maleic anhydride |
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