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• W55649828 abstract "Catalyst structure may be studied by numerous and widely varying methods. Apart from the crystallographic pattern, the structure of the outer surface or of the surface layers is especially important. Unfortunately, we do not know much about the real structure of the surface. It is an important question to know to what degree the surface is a two-dimensional replica of the three-dimensional regularities and irregularities of the lattice. Evaporated films probably show a lamellar structure; the surface planes are not identical with the main orientation of the film as are observed in electron diffraction patterns and through the electron microscope. Catalytic material on a carrier shows generally a microcrystalline structure, no indications of an “amorphous” phase with exceptional properties can be found. Unavoidable, as well as deliberately added, contaminations seem to have an important influence on the structure of the catalytic surface. Closely related is the question of the role played by promoters and their distribution on the surface. Increase of the phase boundary between the solid catalyst and the reaction phase leads to the development of porous structures in most technical catalysts. Many methods are in use to characterize these pores. Acceptable values for the dimensions of the pores and the available surface area are obtained, although certain corrections will be shown to be necessary. In some instances, the genesis of the pores as well as some indications about their shape are available." @default.
• W55649828 created "2016-06-24" @default.
• W55649828 creator A5017203441 @default.
• W55649828 date "1957-01-01" @default.
• W55649828 modified "2023-09-28" @default.
• W55649828 title "16 Structure and Texture of Catalysts" @default.
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• W55649828 doi "https://doi.org/10.1016/s0360-0564(08)60162-5" @default.
• W55649828 hasPublicationYear "1957" @default.
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