Wells–Dawson type Cs5.5H0.5P2W18O62 based Co/Al2O3 as binfunctional catalysts for direct production of clean-gasoline fuel through Fischer–Tropsch synthesis

•Dawson type polyoxometalates based bifunctional catalyst produce gasoline directly.•CsDP based catalysts CsDP-Co made the gasoline selectivity increased by 129%.•CsDP-Co exhibit higher gasoline selectivity than Keggin type CsKP based one.

Polyoxometalates (POMs) possess unique strong Brønsted acidity. However, little attentions were paid to the effect of POMs with respect to the hydrocracking. Herein we show that Wells–Dawson type POMs Cs5.5H0.5P2W18O62 (CsDP) combined with conventional Fischer–Tropsch catalyst Co/Al2O3 forming a highly efficient bifunctional catalyst for the direct production of clean gasoline from syngas. The Brønsted acidity of the CsDP results in hydrocracking of the heavier hydrocarbons formed on Co/Al2O3. The selectivity for the gasoline product could reach 48.8%, which has increased by 129% than that of conventional FTS catalyst. Furthermore, the catalytic performance of Wells–Dawson type POMs Cs5.5H0.5P2W18O62 and Keggin type POMs Cs2.5H0.5PW12O40 based catalyst is compared. The former exhibits higher CO conversion and C5–C12 selectivity than those of the Keggin type of Cs2.5H0.5PW12O40.

Graphical abstractWells–Dawson type Cs5.5H0.5P2W18O62 promoted Co/Al2O3 catalyst enhances the selectivity of gasoline-range hydrocarbons up to 48.8%, with a jump of 129% with respect to unpromoted counterpart.Figure optionsDownload full-size imageDownload high-quality image (152 K)Download as PowerPoint slide