Catalytic cracking upgrading of coal pyrolysis oil and gas products was conducted in a dual-stage reactor using char and Co-impregnated char(Co-char)as the catalyst.The tested coal was Fugu coal

and the upper stage of the dual-stage reactor was used for pyrolysis.During catalytic cracking of coal pyrolysis products

tar yield decreased

and gas yield and also light oil fraction content of(boiling points<360℃) the tar increased

while the yield of light tar remained constant or increased slightly.For the pyrolysis with secondary cracking at 600℃ over a char layer of 20% the tested coal

its gas yield and light tar content increased respectively by 31.2%(vol)and 25%(mass)in comparison with the direct pyrolysis of coal at 600℃

whereas light tar yield varied little.When Co-char was used as the catalyst

cracking at 500℃ over the catalyst of 5% coal mass increased light oil yield and light oil content in the tar by 8.8%(mass)

and 28.8%(mass)

respectively.The corresponding increase in gas yield was 21.5%(vol).Catalytic secondary cracking in coal pyrolysis worked mainly to convert heavy oil components into light oil and pyrolysis gas.