Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 340, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2022.112034
Keywords
Dimethyl ether (DME) to gasoline (DTG); FER/ZMS-5 nanostructures; Catalytic stability; Nano-composited zeolite; Alcohol additives
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Funding
- Korea Institute for Advancement of Technology (KIAT) [P0017363]
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [NRF-2021R1A4A1024129]
- National Research Foundation of Korea (NRF) - Korea government
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Superior catalyst activity and stability for DME conversion to gasoline-range hydrocarbons can be achieved by using a novel hierarchically-structured hybridized FER@ZSM-5 catalyst. The strong interactions between ZSM-5 and FER surfaces, as well as the formation of well-dispersed aggregates with the help of a propanol additive, contribute to the suppression of heavy coke depositions.
A superior catalyst activity and stability for dimethyl ether (DME) conversion to gasoline-range hydrocarbons (DTG) on a novel hierarchically-structured hybridized FER@ZSM-5 were verified in terms of the strong interactions of ZSM-5 on the plate-like FER nanostructures, which were prepared by alcohol additive with two organic structure-directing agent (OSDA). The highly active nanostructured FER@ZSM-5 with a propanol additive showed the closely interconnected and highly dispersed ZSM-5 aggregates on the larger plate-like FER surfaces, which were mainly responsible for the suppressed heavy coke depositions with the help of the closely interconnected ZSM-5 and FER interfaces with abundant acidic sites on 8-membered ring (8-MR) channels. The well-dispersed ZSM-5 nanoparticles on Bronsted acid sites of FER surfaces showed coke-resistant natures for DTG reaction due to the synergy effects of the strong acidic sites of the smaller ZSM-5 particles and larger Bronsted acid sites on the plate-like FER structures.
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