Journal
CHEMCATCHEM
Volume 9, Issue 4, Pages 620-628Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201601228
Keywords
carbon; iron; surface chemistry; mesoporous materials; supported catalysts
Categories
Funding
- German academic exchange service (Deutscher Akademischer Austauschdienst, DAAD)
- European Research Council
- EU FP7 ERC [338846]
Ask authors/readers for more resources
Ordered mesoporous carbon (CMK-3) with different surface modifications is applied as a support for Fe-based catalysts in the Fischer-Tropsch to olefins synthesis (FTO) with and without sodium and sulfur promoters. Different concentrations of functional groups do not affect the size (3-5nm) of Fe particles in the fresh catalysts but iron (carbide) supported on N-enriched CMK-3 and a support with a lower concentration of functional groups show higher catalytic activity under industrially relevant FTO conditions (340 degrees C, 10bar, H-2/CO=2) compared to a support with an O-enriched surface. The addition of promoters leads to more noticeable enhancements of the catalytic activity (3-5times higher) and the selectivity to C-2-C-4 olefins (approximate to 2times higher) than surface functionalization of the support. Nitrogen surface functionalization and removal of surface groups before impregnation and calcination, however, further increase the activity of the catalysts in the presence of promoters. The confinement of the Fe nanoparticles in the mesopores of CMK-3 restricts but does not fully prevent particle growth and, consequently, the decrease of activity under FTO conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available