Assessment of the 3 D Pore Structure and Individual Components of Preshaped Catalyst Bodies by X-Ray Imaging.
Assessment of the 3 D Pore Structure and Individual Components of Preshaped Catalyst Bodies by X-Ray Imaging.
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DOI：
10.1002/cctc.201402925
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发表时间：
2015-02
期刊：
影响因子：
4.5
通讯作者：
van Bokhoven, Jeroen A.
中科院分区：
文献类型：
--
作者：
da Silva, Julio C.;Mader, Kevin;Holler, Mirko;Haberthuer, David;Diaz, Ana;Guizar-Sicairos, Manuel;Cheng, Wu-Cheng;Shu, Yuying;Raabe, Joerg;Menzel, Andreas;van Bokhoven, Jeroen A.
催化剂颗粒中的孔隙率是必不可少的，因为它使反应物能够到达活性位点，并使产物能够离开催化剂。通过调整孔径分布和连通性的复合颗粒催化剂的工程设计受到无法在临界长度尺度上可视化结构和孔隙率的阻碍。在此，它示出相衬X射线显微断层摄影和高分辨率重叠关联X射线断层摄影的组合允许在微米和纳米长度尺度的颗粒间孔的可视化和表征。此外，可以可视化和识别用于流化催化裂化（最常用的催化剂之一）的预成型催化剂体中的各个组分。孔径分布，以及封闭的孔隙，这不能通过传统的方法，如氮气物理吸附和等温线分析探测，进行了测定。
Porosity in catalyst particles is essential because it enables reactants to reach the active sites and it enables products to leave the catalyst. The engineering of composite-particle catalysts through the tuning of pore-size distribution and connectivity is hampered by the inability to visualize structure and porosity at critical-length scales. Herein, it is shown that the combination of phase-contrast X-ray microtomography and high-resolution ptychographic X-ray tomography allows the visualization and characterization of the interparticle pores at micro- and nanometer-length scales. Furthermore, individual components in preshaped catalyst bodies used in fluid catalytic cracking, one of the most used catalysts, could be visualized and identified. The distribution of pore sizes, as well as enclosed pores, which cannot be probed by traditional methods, such as nitrogen physisorption and isotherm analysis, were determined.
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影响因子：
3.8
作者：
Guizar-Sicairos, Manuel;Fienup, James R.
通讯作者：
Fienup, James R.
影响因子：
3.4
作者：
Cloetens, P;Ludwig, W;Peix, G
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Peix, G
影响因子：
3.3
作者：
Thibault, P.;Guizar-Sicairos, M.
通讯作者：
Guizar-Sicairos, M.
影响因子：
16.6
作者：
Ruiz-Martinez, Javier;Beale, Andrew M.;Deka, Upakul;O'Brien, Mathew G.;Quinn, Paul D.;Mosselmans, J. Fred W.;Weckhuysen, Bert M.
通讯作者：
Weckhuysen, Bert M.
影响因子：
3.3
作者：
Koster, AJ;Ziese, U;de Jong, KP
通讯作者：
de Jong, KP