Structural properties and HDS activity of NiMo catalysts supported on lanthana modified zeolite type X and Y

In the search for the active catalysts of hydrodesulfurization reaction, an attempt was made to use zeolites as supports. A series of NaLaX, Mo/NaLaX and NiMo/NaLaX as well as NaLaY, Mo/NaLaY and NiMo/NaLaY catalysts was prep ared and their performance in this reaction was studied. It was shown that crystalline structure of the lanthana forms of the above zeolites only litt le collapsed after ion-exchange and impregnation with active Mo and NiMo co mponents. The NiMo catalysts supported on the zeolites studied were found a ctive in thiophene hydrodesulfurization. The catalysts with lanthana after the first step of ion exchange were the most active. (C) 2001 Elsevier Scie nce B.V. All rights reserved.