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Impregantion is normally divided into incipient wetness and dry impregnation. such as 1.  A series of supported Pd catalysts were prepared by incipient impregnation using a V2O5-SiO2 surface complex prepared by surface modification as the support. 2. The concentration profiles of catalyst precusor in spherical support were investigated for dry impregnation process under equilibrium adsorption.
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