| 余晓鹏,张付宝.甲烷干重整反应用Ni-Ru/MgAl类水滑石催化剂的研究[J].分子催化,2015,(5):448-457 |
| 甲烷干重整反应用Ni-Ru/MgAl类水滑石催化剂的研究 |
| Ni-Ru/MgAl Catalysts Derived from Hydrotalcites for the Dry Reforming of Methane |
| 投稿时间：2015-10-13 修订日期：2015-11-02 |
| DOI： |
| 中文关键词: 水滑石 焙烧记忆法 Ni-Ru 甲烷干重整 积碳 |
| 英文关键词:Hydrotalcites, Memory effect, Ni-Ru, Dry reforming of methane, Coke deposition |
| 基金项目: |
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| 摘要点击次数: 1384 |
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| 中文摘要: |
| 采用焙烧记忆法分别制备Ni/MgAlO和NiRu/MgAlO 类水滑石催化剂用于甲烷干重整反应。利用XRD、TPR、TG、XPS、CO2-TPD、TEM等表征催化剂的结构及失活特征，发现在Ni/MgAlO中添加Ru，有利于增加催化剂表面 Ni 含量，并促进Ni2+的还原。不同Mg/Al比双金属催化剂中，7Ni-0.15Ru/Mg2.5Al催化剂具有较高的催化活性，这归结为该催化剂适宜的碱性、较高表面Ni含量以及小尺寸的Ni0物种。添加 Ru 明显抑制Ni/MgAlO催化剂表面的丝状碳的形成。而7Ni-0.15Ru/Mg2.5Al较强的抗积碳性能与其较小Ni0晶粒尺寸及适宜催化剂碱性有关。 |
| 英文摘要: |
| The Ni/MgAlO and NiRu/MgAlO catalysts were prepared by calcined reconstruction method for the dry reforming of methane. X-ray diffraction, temperature programmed reduction of hydrogen, thermogravimetric analysis, X-ray photoelectron spectroscopy, temperature-programmed desorption of carbon dioxide and transmission electron microscopy were used to investigate the structure and deactivation characteristics of the catalysts. The introduction of Ru into the Ni/MgAlO increased the surface Ni content and facilitated the reduction of Ni2+ species. The 7Ni-0.15Ru/Mg2.5Al catalyst possessed the higher catalytic activity, which was ascibed to the optimum basicity, high surface active metal content and small metal particles of the catalysts. The introduction of Ru into Ni/MgAlO catalyst significantly suppressed the formation of filamentous coke. The 7Ni-0.15Ru/Mg2.5Al catalyst exhibited strong resistance to coke formation, which was closely related to its small Ni0 particles and optimum basicity. |
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