In this report

Co-based catalysts supported on ZnO

Al

2

O

3

and ZrO

2

as well as the ZrO

2

derived from different precipitants and different pH values were prepared by co-precipitation method. Their catalytic Fischer-Tropsch synthesis (FTS) performance was investigated in a fixed-bed reactor. The results revealed that Co catalyst supported on ZrO

2

exhibited better FTS catalytic performance than that supported on ZnO or Al

2

O

3

. For the Co/ZrO

2

catalyst

different precipitants showed the following an activity order of NaOH Na

2

CO

3

NH

4

OH

and the best pH value is 13. The catalysts were characterized by N

2

adsorption-desorption

XRF

XRD

H

2

-TPR

H

2

-TPD and TEM. It was found that the main factor affecting the CO conversion of the catalyst was the amounts of low-temperature active adsorption sites. Moreover

the selectivity of C

5

+

hydrocarbons had a positive relationship with the peak temperature of the weak hydrogen adsorption sites. The higher the peak temperature

the higher the C

5

+

sel

ectivity is.