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首页> 外文期刊>Catalysis science & technology >Towards active macro-mesoporous hydrotreating catalysts: synthesis and assembly of mesoporous alumina microspheres
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Towards active macro-mesoporous hydrotreating catalysts: synthesis and assembly of mesoporous alumina microspheres

机译：对活跃macro-mesoporous加氢处理介孔催化剂:合成和组装氧化铝微球

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摘要

In this study, unique mesoporous structure alumina microspheres, each of which comprises an assembly of numerous highly crystallized alumina nanorods, were prepared via a facile template-free hydrothermal method. Such alumina microspheres were further assembled in one step to form a macroporous structure with abundant inter-microspheres via pore-directing-agent-free molding process. Owing to the morphological merits and the remarkable mechanical stability of the as-formed alumina microspheres, the macro-pores formed from the stable packing of the alumina microspheres had average sizes as large as 265 nm and were well connected with each other. Moreover, the inter-microsphere mesopores with an average size of 12.2 nm were well-maintained after the molding process. With such hierarchical porosity and large specific surface area, the as-prepared alumina support enabled better dispersion of the active MoNi components. Accordingly, the macro-mesoporous MoNi/Al2O3 catalyst exhibited both significantly higher catalytic activities and longer service life for the hydrodemetallization of nickel(II) 5, 10, 15, 20-tetraphenylporphine and for the hydrodesulfurization of dibenzothiophene as compared to controls with a single type of pores. With the ease of preparation, large surface area, and remarkable activity and stability, such a macro-mesoporous alumina support provides a promising alternative for hydrotreating heavy raw oils in industry.
机译：在这项研究中,独特的结构介孔氧化铝微球,每一个都包含一个组装众多高度结晶氧化铝纳米棒,摘要报道了准备通过一个简单吗热液的方法。进一步组装在一个步骤形成大孔结构和丰富的通过pore-directing-agent-free inter-microspheres成型的过程。优点和卓越的机械稳定性初纺氧化铝微球,macro-pores形成的稳定的包装氧化铝微球平均大小一样大265海里,是与每一个其他。平均12.2 nm的大小维护良好后成型的过程。这样分层孔隙度和大具体表面积,和氧化铝的支持使更好的分散活动的模拟组件。模拟/氧化铝催化剂表现出两个显著更高的催化活性和更长的服务生活的hydrodemetallization镍(II)5、10、15 20-tetraphenylporphine和加氢脱硫的硫芴而控制单一类型的毛孔。易于制备,大的表面积,,这样一个非凡的活性和稳定性macro-mesoporous氧化铝提供了支持有前途的替代加氢处理沉重的生工业油。

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