Effect of boron incorporation on the structure, products selectivities and lifetime of H-ZSM-5 nanocatalyst designed for application in methanol-to-olefins (MTO) reaction
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Type
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Journal Article
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Author
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Fereydoon Yaripour
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Author
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Zahra Shariatinia
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URL
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Volume
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203
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Pages
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41-53
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Publication
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Microporous and Mesoporous
Materials
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Date
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February 2015
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Abstract
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Reports the effect of boron incorporation into
H-ZSM-5 nanocatalyst on the stability, product distribution and hydrocarbons
selectivity in methanol to olefins (MTO) reaction. Researchers fabricated the
reference and boron-modified ZSM-5 nanocatalysts using the hydrothermal
method.
Results revealed that propylene selectivity does not change significantly with the isomorphous substitution of B in H-ZSM-5 zeolite. However, the lifetime of the modified zeolite displayed a significant increase compared to that of the reference sample. Researchers ascribe the enhancement of the lifetime and catalytic stability to reduction of strong/mild acid sites ratio as well as small crystal size of the [B]-H-ZSM-5 nanocatalyst. The characterization of the deactivated nanocatalysts showed that incorporation of boron decreased both rates of coke formation and coke-susceptibility of the ZSM-5 nanocatalyst. |
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