Role of mesopores in Co/ZSM-5 for the direct synthesis of liquid fuel by Fischer–Tropsch synthesis

In a complex reaction system, in which gas, liquid, and solid catalysts work together, understanding the impact of mass transfer that varies with the catalyst pore structure is very challenging but also essential to designing selective catalysts. We investigated the effect of mesopores introduced in...

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Bibliographic Details
Published in:Catalysis science & technology 2018, Vol.8 (24), p.6346-6359
Main Authors: Min, Ji-Eun, Kim, Sungtak, Kwak, Geunjae, Kim, Yong Tae, Han, Seung Ju, Lee, Yunjo, Jun, Ki-Won, Kim, Seok Ki
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Dispersion
Distillation
Fischer-Tropsch process
Fuels
Isomerization
Liquid fuels
Mass transfer
Nanoparticles
Porosity
Zeolites
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Summary:In a complex reaction system, in which gas, liquid, and solid catalysts work together, understanding the impact of mass transfer that varies with the catalyst pore structure is very challenging but also essential to designing selective catalysts. We investigated the effect of mesopores introduced into bi-functional Co/ZSM-5 catalysts on the direct production of liquid fuel by low-temperature Fischer–Tropsch synthesis (FTS). The influence of mesopores on the textural properties, Co dispersion, zeolite crystallinity, the density of acid sites, and the resulting FTS performance was studied in detail. The presence of mesopores facilitated the dispersion of Co nanoparticles and the regulation of acidity, affording high CO conversion and a moderate degree of isomerization. In addition, close proximity between FTS active sites and acid functionalized sites could be achieved by the introduction of mesopores. However, the relationship between the structural parameter and liquid fuel productivity suggested that the mesopores did not reduce the mass transfer resistance of the reactants and intermediates during the FTS reaction.
ISSN:2044-4753
2044-4761
DOI:10.1039/C8CY01931B