Print Email Facebook Twitter Unveiling the Structure Sensitivity for Direct Conversion of Syngas to C2-Oxygenates with a Multicomponent-Promoted Rh Catalyst Title Unveiling the Structure Sensitivity for Direct Conversion of Syngas to C2-Oxygenates with a Multicomponent-Promoted Rh Catalyst Author Sun, X. (TU Delft ChemE/Catalysis Engineering) Jansma, H. (TU Delft ChemE/O&O groep; TU Delft ChemE/Catalysis Engineering) Miyama, Toshihito (Sekisui Chemical Co., LTD., Tsukubashi) Sanjeewa Aluthge, Rasika Dasanayake (Sekisui Chemical Co., LTD., Tsukubashi) Shinmei, Kenichi (Sekisui Chemical Co., LTD., Tsukubashi) Yagihashi, Noritoshi (Sekisui Chemical Co., LTD., Tsukubashi) Nishiyama, Haruka (Sekisui Chemical Co., LTD., Tsukubashi) Osadchii, D. (TU Delft ChemE/Catalysis Engineering) van der Linden, B. (TU Delft ChemE/O&O groep; TU Delft ChemE/Catalysis Engineering) Makkee, M. (TU Delft ChemE/Catalysis Engineering) Date 2019 Abstract Abstract: Mn and Li promoted Rh catalysts supported on SiO2 with a thin TiO2 layer were synthesized by stepwise incipient wetness impregnation approach. The thin TiO2 layer on the surface of SiO2 was proved to stabilize those small Rh nanoparticles and hinder their agglomeration. The reducibility of Rh on these catalysts depends on Rh particle size as well as the position of manganese oxide, and large Rh nanoparticles with MnO on Rh nanoparticles can be only reduced at an elevated temperature. Catalyst with large Rh particles exhibits a higher CO conversion and higher products selectivity towards long chain hydrocarbons and C2-oxygenates at the expense of decreasing methane formation than a similar catalyst with smaller Rh particles. This was attributed to the synergistic effect of Mn and Li promotion and molar ratio between Rh0 and Rhδ+ sites on the surface of Rh nanoparticles. Moreover, Rh nanoparticles on MnO are proved to be more efficient in promoting hydrogenation of acetaldehyde to ethanol than its counterpart with MnO on Rh nanoparticles. Finally, in order to target high C2-oxygenates selectivity, low reaction temperature together with a low H2/CO ratio in the feed is recommended. Graphic Abstract: [Figure not available: see fulltext.]. Subject AcetaldehydeEthanolMnParticle sizeRh To reference this document use: http://resolver.tudelft.nl/uuid:633ecf01-8d29-4756-9ef7-6f6f465daa9d DOI https://doi.org/10.1007/s10562-019-03016-x ISSN 1011-372X Source Catalysis Letters, 150 (2), 482-492 Part of collection Institutional Repository Document type journal article Rights © 2019 X. Sun, H. Jansma, Toshihito Miyama, Rasika Dasanayake Sanjeewa Aluthge, Kenichi Shinmei, Noritoshi Yagihashi, Haruka Nishiyama, D. Osadchii, B. van der Linden, M. Makkee Files PDF Sun2019_Article_Unveiling ... sitivi.pdf 3.14 MB Close viewer /islandora/object/uuid:633ecf01-8d29-4756-9ef7-6f6f465daa9d/datastream/OBJ/view