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热改性对负载型铜基活性炭催化剂催化甘油氢解反应的影响

Thermal Modification Effect on Supported Cu-Based Activated Carbon Catalyst in Hydrogenolysis of Glycerol.

作者信息

Seguel Juan, García Rafael, Chimentão Ricardo José, García-Fierro José Luis, Ghampson I Tyrone, Escalona Néstor, Sepúlveda Catherine

机构信息

Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160C, Chile.

Millenium Nuclei on Catalytic Processes towards Sustainable Chemistry (CSC), Santiago 7810000, Chile.

出版信息

Materials (Basel). 2020 Jan 29;13(3):603. doi: 10.3390/ma13030603.

DOI:10.3390/ma13030603
PMID:32013085
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7040595/
Abstract

Glycerol hydrogenolysis to 1,2-propanediol (1,2-PDO) was performed over activated carbon supported copper-based catalysts. The catalysts were prepared by impregnation using a pristine carbon support and thermally-treated carbon supports (450, 600, 750, and 1000 °C). The final hydrogen adsorption capacity, porous structure, and total acidity of the catalysts were found to be important descriptors to understand catalytic performance. Oxygen surface groups on the support controlled copper dispersion by modifying acidic and adsorption properties. The amount of oxygen species of thermally modified carbon supports was also found to be a function of its specific surface area. Carbon supports with high specific surface areas contained large amount of oxygen surface species, inducing homogeneous distribution of Cu species on the carbon support during impregnation. The oxygen surface groups likely acted as anchorage centers, whereby the more stable oxygen surface groups after the reduction treatment produced an increase in the interaction of the copper species with the carbon support, and determined catalytic performances.

摘要

在活性炭负载的铜基催化剂上进行甘油氢解制1,2 - 丙二醇（1,2 - PDO）的反应。催化剂通过使用原始碳载体和经过热处理的碳载体（450、600、750和1000℃）浸渍制备。发现催化剂的最终氢吸附容量、多孔结构和总酸度是理解催化性能的重要描述符。载体上的氧表面基团通过改变酸性和吸附性能来控制铜的分散。还发现热改性碳载体的氧物种数量是其比表面积的函数。具有高比表面积的碳载体含有大量的氧表面物种，在浸渍过程中促使铜物种在碳载体上均匀分布。氧表面基团可能充当锚固中心，还原处理后更稳定的氧表面基团使铜物种与碳载体之间的相互作用增加，并决定了催化性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed59/7040595/695bb83dfae9/materials-13-00603-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed59/7040595/a51ae9121c81/materials-13-00603-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed59/7040595/695bb83dfae9/materials-13-00603-g008.jpg

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本文引用的文献

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Fundamental studies and perceptions on the spillover mechanism for hydrogen storage.关于储氢溢出机制的基础研究和认识。
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Chemoselective catalytic conversion of glycerol as a biorenewable source to valuable commodity chemicals.将生物可再生资源甘油化学选择性催化转化为高价值的商品化学品。
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Characterization and reactivity of copper oxide catalysts supported on TiO2-ZrO2.
负载于TiO₂-ZrO₂上的氧化铜催化剂的表征及反应活性
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Metal particle growth during glucose hydrogenation over Ru/SiO2 evaluated by X-ray absorption spectroscopy and electron microscopy.通过X射线吸收光谱和电子显微镜评估Ru/SiO₂上葡萄糖加氢过程中的金属颗粒生长。
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