Selective hydrogenation of CO2 and CO to useful light olefins over octahedral molecular sieve manganese oxide supported iron catalysts

Autor:	Mark Aindow, Christopher J. Brooks, Boxun Hu, Hector F. Garces, Eric Kreidler, Samuel Frueh, Lichun Zhang, Steven L. Suib
Rok vydání:	2013
Předmět:	Olefin fiber Process Chemistry and Technology Inorganic chemistry chemistry.chemical_element Fischer–Tropsch process Manganese Molecular sieve Catalysis Nanomaterial-based catalyst Carbide chemistry Selectivity General Environmental Science
Zdroj:	Applied Catalysis B: Environmental. :54-61
ISSN:	0926-3373
Popis:	Porous cryptomelane-type octahedral molecular sieve manganese oxide (K-OMS-2) supported iron nanocatalysts have been developed for selective hydrogenation of CO 2 and CO to light olefins. Surface coated iron (SCI) catalysts and frame-work doped iron (FDI) catalysts have different interfaces. The synergistic interactions of nano-size iron carbides, potassium promoters, and manganese oxides vary in these two types of the Fischer-Tropsch (F-T) catalysts with respect to their catalytic activities and selectivity. For example, the SCI catalysts have high selectivity (>95%) to light olefins but low catalytic activity with a CO conversion of 45% and a CO 2 conversion of 32%. The FDI catalysts showed higher catalytic activities with a CO conversion of 87% and a CO 2 conversion of 45%. Direct analyses in real time-mass spectra and temperature programmed reduction-mass spectra have been used to correlate temperature effects. These component–structure–activity relationships provide insight for CO 2 utilization and F-T syntheses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::20ac64375e027c27f4ede6f60c27bab2 https://doi.org/10.1016/j.apcatb.2012.11.003 Zobrazit plný text záznamu Full Text from ScienceDirect