Fig. 5: Stability of confined ZnOx overlayer and its effect on syngas conversion.
From: ZnOx overlayer confined on ZnCr2O4 spinel for direct syngas conversion to light olefins
a XRD patterns of ZnCr2O4@ZnOx-30 catalysts before and after leaching with (NH4)2CO3 solution (named as ZnCr2O4@ZnOx-30-L). b ICP-OES results of ZnO content in ZnCr2O4@ZnOx before and after leaching with (NH4)2CO3 solution. c Catalytic performance of ZnCr2O4@ZnOx-30 and ZnCr2O4@ZnOx-30-L catalysts coupled with SAPO-34. Reaction conditions: 0.20 g ZnCr2O4@ZnOx + 0.10 g SAPO-34, 68% H2 + 27% CO + 5% Ar, 4.0 MPa, 25 mL·min−1, 40–60 mesh, and 400 °C. d Catalytic performance versus time on stream (TOS) of ZnCr2O4@ZnOx-15 and ZnCr2O4@ZnOx-30 catalysts coupled with SAPO-34. Reaction conditions: 0.20 g ZnCr2O4@ZnOx + 0.10 g SAPO-34, 68% H2 + 27% CO + 5% Ar, 4.0 MPa, 25 mL·min−1, 60–80 mesh, and 400 °C.
