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In the hydroprocessing of coker naphtha (hydrodesulfuration and hydrodenitrogenation), silica poisoning of hydrotreating catalysts represents a severe problem due to the deposition of Si species, which deactivate the catalyst and shorten its life time. The deactivation results of the sulfided NiMo/γ-Al2O3 hydrotreating catalyst, obtained by running a long-term test, are presented. Refinery coker naphtha...
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