| 师少飞,王玉琪,马进成.Ni-La/CexZr1-xO2对甲烷部分氧化/CH4-CO2重整耦合制合成气的催化剂制备及反应性能[J].分子催化,2013,(6):539-547 |
| Ni-La/CexZr1-xO2对甲烷部分氧化/CH4-CO2重整耦合制合成气的催化剂制备及反应性能 |
| The preparation and performance of Ni-La/CexZr1-xO2 catalysts for coupled methane partial oxidation/CH4-CO2 reforming to syngas |
| 投稿时间：2013-09-29 修订日期：2013-11-14 |
| DOI： |
| 中文关键词: 铈锆固溶体 甲烷部分氧化 甲烷二氧化碳重整 镍-镧催化剂 催化性能 |
| 英文关键词:Ce/Zr solid solution methane partial oxidation CO2 reforming of methane Ni-La catalyst catalytic performance |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 通过共沉淀法制备铈锆固溶体作为载体，采用等体积、分步浸渍的方法制备了一系列10% Ni-3% La/CexZr1-xO2（X=0、0.16、0.5、0.75、1）催化剂，并将其应用到甲烷部分氧化和甲烷二氧化碳重整耦合制合成气的反应中。对不同Ce/Zr比的催化剂性能展开研究，采用XRD、H2-TPR、SEM手段对载体及催化剂进行了表征。结果表明，铈锆固溶体的形成不仅提高了催化剂表面活性组分的分散度，使催化剂表面NiO晶粒尺寸从26.5 nm减到13.7 nm；而且能够加强活性组分与载体之间的相互作用，提高催化剂的热稳定性能；随着Ce/Zr比的增加，催化剂的转化率、选择性及稳定性随之增强，其关系为：Ni-La/Ce0.75Zr0.25O2 > Ni-La/Ce0.5Zr0.5O2 > Ni-La/Ce0.16Zr0.84O2。 |
| 英文摘要: |
| CexZr1-xO2 supports were prepared by coprecipitation. 10wt% Ni-3wt% La catalysts supported on CexZr1-xO2 were produced by an incipient wetness impregnation method in syngas production, using coupled methane partial oxidation and CH4/CO2 reforming. The series of 10% Ni-3% La/CexZr1-xO2（X=0、0.16、0.5、0.75、1）catalysts were characterized by X-ray diffraction, H2 temperature-programmed reduction, scanning electron microscope. Experimental results show that Ce/Zr solid solution can improve the dispersion of active components on catalyst surface, reduce the NiO crystalline size from 26.5nm to 13.5nm.Moreover, it can strengthen the interaction between active metal and supports, boost the thermal stability of the catalysts. The conversion rate, selectivity and stability of the catalysts were enhanced with the increase of Ce/Zr ratio as follows, Ni La/Ce0.75 Zr0.25O2>Ni La/Ce0.5 Zr0.5O2>Ni La/Ce0.16 Zr0.84O2. |
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