Print Email Facebook Twitter Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer-Tropsch synthesis Title Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer-Tropsch synthesis Author Wezendonk, T.A. (TU Delft ChemE/Catalysis Engineering) Warringa, Quirinus S E Santos, Vera P. (Core R and D) Chojecki, Adam (Core R and D) Ruitenbeek, Matthijs (Hydrocarbons R and D) Meima, Garry (Hydrocarbons R and D) Makkee, M. (TU Delft ChemE/Catalysis Engineering) Kapteijn, F. (TU Delft ChemE/Catalysis Engineering) Gascon, Jorge (TU Delft ChemE/Catalysis Engineering) Date 2017 Abstract The structure and elementary composition of various commercial Fe-based MOFs used as precursors for Fischer-Tropsch synthesis (FTS) catalysts have a large influence on the high-temperature FTS activity and selectivity of the resulting Fe on carbon composites. The selected Fe-MOF topologies (MIL-68, MIL-88A, MIL-100, MIL-101, MIL-127, and Fe-BTC) differ from each other in terms of porosity, surface area, Fe and heteroatom content, crystal density and thermal stability. They are re-engineered towards FTS catalysts by means of simple pyrolysis at 500 °C under a N2 atmosphere and afterwards characterized in terms of porosity, crystallite phase, bulk and surface Fe content, Fe nanoparticle size and oxidation state. We discovered that the Fe loading (36-46 wt%) and nanoparticle size (3.6-6.8 nm) of the obtained catalysts are directly related to the elementary composition and porosity of the initial MOFs. Furthermore, the carbonization leads to similar surface areas for the C matrix (SBET between 570 and 670 m2 g-1), whereas the pore width distribution is completely different for the various MOFs. The high catalytic performance (FTY in the range of 1.9-4.6 × 10-4 molCO gFe -1 s-1) of the resulting materials could be correlated to the Fe particle size and corresponding surface area, and only minor deactivation was found for the N-containing catalysts. Elemental analysis of the catalysts containing deliberately added promoters and inherent impurities from the commercial MOFs revealed the subtle interplay between Fe particle size and complex catalyst composition in order to obtain high activity and stability next to a low CH4 selectivity. To reference this document use: http://resolver.tudelft.nl/uuid:40a81db9-e356-47f2-8d61-ce248da6466e DOI https://doi.org/10.1039/c6fd00198j Embargo date 2017-10-17 ISSN 1359-6640 Source Faraday Discussions, 197, 225-242 Part of collection Institutional Repository Document type journal article Rights © 2017 T.A. Wezendonk, Quirinus S E Warringa, Vera P. Santos, Adam Chojecki, Matthijs Ruitenbeek, Garry Meima, M. Makkee, F. Kapteijn, Jorge Gascon Files PDF Main_Final.pdf 3.64 MB PDF SI_Final.pdf 6.59 MB Close viewer /islandora/object/uuid:40a81db9-e356-47f2-8d61-ce248da6466e/datastream/OBJ1/view