Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts: Ti species-tuned Co state and surface acidity

Yueqi Wu; Jiangping Long; Sheng Wei; Yating Gao; Dan Yang; Yihu Dai; Yanhui Yang

doi:10.1016/j.micromeso.2022.112115

Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts: Ti species-tuned Co state and surface acidity

Yueqi Wu, Jiangping Long, Sheng Wei, Yating Gao, Dan Yang, Yihu Dai, Yanhui Yang

School of Chemistry and Moleculai Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

With the modified Ti-ZSM-5 zeolites as supports, the propane dehydrogenation (PDH) performance of the non-noble metal Co-based catalysts can be enhanced, which is benefited from the Ti species-tuned state of active Co species and surface acid property. The developed Co/Ti-ZSM-5 catalysts exhibit >95% C₃H₆ selectivity and good regeneration stability in the recycling PDH reactions. The characterization results illustrate the structural evolution of Ti from the framework and extra-framework Ti species to the small-size anatase TiO₂ species with decreasing the Si/Ti ratio of the Ti-ZSM-5 zeolites, tailoring the dispersion and chemical state of the Co sites at different Co-zeolite or Co-TiO₂ interfaces. The Ti-ZSM-5 zeolites with high Si/Ti ratios also show significantly reduced surface acidity especially the Brønsted acidity in comparison with the Al-ZSM-5 zeolite, thus facilitating the C₃H₆ desorption for enhancing the selectivity and anti-coke stability.

Original language	English
Article number	112115
Journal	Microporous and Mesoporous Materials
Volume	341
DOIs	https://doi.org/10.1016/j.micromeso.2022.112115
State	Published - Aug 2022

Keywords

Acidity
Co catalyst
Coke
Propane dehydrogenation
Propylene
Ti-ZSM-5 zeolite

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@article{edef014a8ada4169afcaf77dc2a243da,

title = "Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts: Ti species-tuned Co state and surface acidity",

abstract = "With the modified Ti-ZSM-5 zeolites as supports, the propane dehydrogenation (PDH) performance of the non-noble metal Co-based catalysts can be enhanced, which is benefited from the Ti species-tuned state of active Co species and surface acid property. The developed Co/Ti-ZSM-5 catalysts exhibit >95% C3H6 selectivity and good regeneration stability in the recycling PDH reactions. The characterization results illustrate the structural evolution of Ti from the framework and extra-framework Ti species to the small-size anatase TiO2 species with decreasing the Si/Ti ratio of the Ti-ZSM-5 zeolites, tailoring the dispersion and chemical state of the Co sites at different Co-zeolite or Co-TiO2 interfaces. The Ti-ZSM-5 zeolites with high Si/Ti ratios also show significantly reduced surface acidity especially the Br{\o}nsted acidity in comparison with the Al-ZSM-5 zeolite, thus facilitating the C3H6 desorption for enhancing the selectivity and anti-coke stability.",

keywords = "Acidity, Co catalyst, Coke, Propane dehydrogenation, Propylene, Ti-ZSM-5 zeolite",

author = "Yueqi Wu and Jiangping Long and Sheng Wei and Yating Gao and Dan Yang and Yihu Dai and Yanhui Yang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Inc.",

year = "2022",

month = aug,

doi = "10.1016/j.micromeso.2022.112115",

language = "英语",

volume = "341",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts

T2 - Ti species-tuned Co state and surface acidity

AU - Wu, Yueqi

AU - Long, Jiangping

AU - Wei, Sheng

AU - Gao, Yating

AU - Yang, Dan

AU - Dai, Yihu

AU - Yang, Yanhui

PY - 2022/8

Y1 - 2022/8

N2 - With the modified Ti-ZSM-5 zeolites as supports, the propane dehydrogenation (PDH) performance of the non-noble metal Co-based catalysts can be enhanced, which is benefited from the Ti species-tuned state of active Co species and surface acid property. The developed Co/Ti-ZSM-5 catalysts exhibit >95% C3H6 selectivity and good regeneration stability in the recycling PDH reactions. The characterization results illustrate the structural evolution of Ti from the framework and extra-framework Ti species to the small-size anatase TiO2 species with decreasing the Si/Ti ratio of the Ti-ZSM-5 zeolites, tailoring the dispersion and chemical state of the Co sites at different Co-zeolite or Co-TiO2 interfaces. The Ti-ZSM-5 zeolites with high Si/Ti ratios also show significantly reduced surface acidity especially the Brønsted acidity in comparison with the Al-ZSM-5 zeolite, thus facilitating the C3H6 desorption for enhancing the selectivity and anti-coke stability.

AB - With the modified Ti-ZSM-5 zeolites as supports, the propane dehydrogenation (PDH) performance of the non-noble metal Co-based catalysts can be enhanced, which is benefited from the Ti species-tuned state of active Co species and surface acid property. The developed Co/Ti-ZSM-5 catalysts exhibit >95% C3H6 selectivity and good regeneration stability in the recycling PDH reactions. The characterization results illustrate the structural evolution of Ti from the framework and extra-framework Ti species to the small-size anatase TiO2 species with decreasing the Si/Ti ratio of the Ti-ZSM-5 zeolites, tailoring the dispersion and chemical state of the Co sites at different Co-zeolite or Co-TiO2 interfaces. The Ti-ZSM-5 zeolites with high Si/Ti ratios also show significantly reduced surface acidity especially the Brønsted acidity in comparison with the Al-ZSM-5 zeolite, thus facilitating the C3H6 desorption for enhancing the selectivity and anti-coke stability.

KW - Acidity

KW - Co catalyst

KW - Coke

KW - Propane dehydrogenation

KW - Propylene

KW - Ti-ZSM-5 zeolite

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U2 - 10.1016/j.micromeso.2022.112115

DO - 10.1016/j.micromeso.2022.112115

M3 - 文章

AN - SCOPUS:85134732213

SN - 1387-1811

VL - 341

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

M1 - 112115

ER -

Non-oxidative propane dehydrogenation over Co/Ti-ZSM-5 catalysts: Ti species-tuned Co state and surface acidity

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Keywords

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