The MHZSM-5(M=Fe

Zr and Co) zeolite catalysts prepared by impregnation method were characterized using laser particle size analyzer

specific surface area and pore size analyzer and X-ray diffraction (XRD)

and applied for on-line cracking vapors from cellulose fast pyrolysis with vertical two-stages furnace. The bio-oils obtained by direct liquefaction with and without catalysts were characterized by GC-MS analyses. The results indicated that with introduction of catalysts

liquid yield decreased from 52.06% to 23.63%

while gas yield increased up to 70.84% from 42.39%; and CoHZSM-5 showed the most obvious effect for catalytic pyrolysis. The component of bio-oil from fast pyrolysis of cellulose was mainly 1

6-dehydration-β-D-glucopyranose (levoglucosan). After the addition of catalysts to online catalytically reform vapors of cellulose fast pyrolysis

the contents of aromatics increased significantly in the product

and FeHZSM-5 and ZrHZSM-5 had the best effect. The content of levoglucosan was increased to 63.78% for HZSM-5 catalyst. The contents of acetic acid and propionic acid were reduced slightly by catalytic pyrolysis. Based on the balance of the yield and composition of bio-oil

it was considered that FeHZSM-5 and ZrHZSM-5 played more significant role during cellulose fast pyrolysis.