Cerium-containing zeolites and coke reduction methods

The invention provides a catalyst system for catalytic fast pyrolysis comprising a cerium-incorporated HZSM-5 zeolite (Catalyst 1), and methods of making and using the same. The invention also provides a process for reducing coke formation during catalytic fast pyrolysis of biomass using HZSM-5, wherein the process can include incorporating cerium into the HZSM-5 zeolite to produce Catalyst 1 prior to the catalytic fast pyrolysis.