Lower hydrocarbons are key building blocks in chemical industry. The Fischer-Tropsch synthesis has been considered as one of the most promising non-oil based routes for lower hydrocarbons production. Previous studies have demonstrated that the supports can greatly affect the product distribution. In this work

the effects of the base property of supports on the catalytic performance of different Fe-based catalysts (Fe20/AlPO4

Fe20/γ-Al2O3 and Fe20/MgAl2O4) were investigated. The results showed that

with the increase in support basicity

the chain growth probability (α value)

the selectivity of C5+ hydrocarbons and the olefins/paraffin ratio increased. Moreover

by combining with the Raman and temperature programmed hydrogenation (TPH)

it was found that the higher basicity of supports could lead to the less active carbon (absorptive and atomic carbon) and the more inactive carbon (graphitized carbon) formation. In addition

with the combination of other characterization

such as XRD

H2-TPR

CO2-TPR

the structure-performance relationship was constructed. The variation in electron-donating ability of the supports strongly affected the content of carbonaceous species on the catalyst surface and the metal-support interaction

thereby leading to the difference in catalytic activity and selectivity.