Role of ZrO2 in enhancing FeCoK catalysts for syngas conversion to light olefins

Napaphut Dolsiririttigul; Thanapha Numpilai; Chin Kui Cheng; Le Kim Hoang Pham; Thongthai Witoon

doi:10.1016/j.mcat.2024.113901

Role of ZrO₂ in enhancing FeCoK catalysts for syngas conversion to light olefins

Napaphut Dolsiririttigul
, Thanapha Numpilai
, Chin Kui Cheng
, Le Kim Hoang Pham
, Thongthai Witoon

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

5 Scopus citations

Abstract

The primary aim of this study is to understand the role of ZrO₂ in iron-cobalt-potassium (FeCoK) based catalysts for converting syngas to light olefins. Our findings reveal that ZrO₂ support notably enhances the dispersion of Fe, Co, and K species, thus improving the reducibility of Fe₂O₃, Co₃O₄, and KNO₃. This leads to increased medium and strong hydrogen adsorption and elevated medium basicity. At lower temperatures (300 °C and 320 °C), the space-time yield (STY) of hydrocarbons over FeCoK/ZrO₂ is less than FeCoK due to the strong adsorption of intermediates by the increased basicity. However, at higher temperatures (360 °C and 380 °C), this trend reverses, indicating the high-temperature mitigates strong adsorption effects. The FeCoK/ZrO₂ catalyst achieved the best STY of C_2–C₄ olefins of 13.2 mmol g_cat ⁻¹ h⁻¹ at 380 °C.

Original language	British English
Article number	113901
Journal	Molecular Catalysis
Volume	555
DOIs	https://doi.org/10.1016/j.mcat.2024.113901
State	Published - 15 Feb 2024

Keywords

Adsorption strength
Hydrogenation
Light olefins
Syngas
ZrO

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10.1016/j.mcat.2024.113901

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@article{427071d909894ca0885ecc09ad511ca8,

title = "Role of ZrO2 in enhancing FeCoK catalysts for syngas conversion to light olefins",

abstract = "The primary aim of this study is to understand the role of ZrO2 in iron-cobalt-potassium (FeCoK) based catalysts for converting syngas to light olefins. Our findings reveal that ZrO2 support notably enhances the dispersion of Fe, Co, and K species, thus improving the reducibility of Fe2O3, Co3O4, and KNO3. This leads to increased medium and strong hydrogen adsorption and elevated medium basicity. At lower temperatures (300 °C and 320 °C), the space-time yield (STY) of hydrocarbons over FeCoK/ZrO2 is less than FeCoK due to the strong adsorption of intermediates by the increased basicity. However, at higher temperatures (360 °C and 380 °C), this trend reverses, indicating the high-temperature mitigates strong adsorption effects. The FeCoK/ZrO2 catalyst achieved the best STY of C2–C4 olefins of 13.2 mmol gcat −1 h−1 at 380 °C.",

keywords = "Adsorption strength, Hydrogenation, Light olefins, Syngas, ZrO",

author = "Napaphut Dolsiririttigul and Thanapha Numpilai and Cheng, \{Chin Kui\} and Pham, \{Le Kim Hoang\} and Thongthai Witoon",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier B.V.",

year = "2024",

month = feb,

day = "15",

doi = "10.1016/j.mcat.2024.113901",

language = "British English",

volume = "555",

journal = "Molecular Catalysis",

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TY - JOUR

T1 - Role of ZrO2 in enhancing FeCoK catalysts for syngas conversion to light olefins

AU - Dolsiririttigul, Napaphut

AU - Numpilai, Thanapha

AU - Cheng, Chin Kui

AU - Pham, Le Kim Hoang

AU - Witoon, Thongthai

PY - 2024/2/15

Y1 - 2024/2/15

N2 - The primary aim of this study is to understand the role of ZrO2 in iron-cobalt-potassium (FeCoK) based catalysts for converting syngas to light olefins. Our findings reveal that ZrO2 support notably enhances the dispersion of Fe, Co, and K species, thus improving the reducibility of Fe2O3, Co3O4, and KNO3. This leads to increased medium and strong hydrogen adsorption and elevated medium basicity. At lower temperatures (300 °C and 320 °C), the space-time yield (STY) of hydrocarbons over FeCoK/ZrO2 is less than FeCoK due to the strong adsorption of intermediates by the increased basicity. However, at higher temperatures (360 °C and 380 °C), this trend reverses, indicating the high-temperature mitigates strong adsorption effects. The FeCoK/ZrO2 catalyst achieved the best STY of C2–C4 olefins of 13.2 mmol gcat −1 h−1 at 380 °C.

AB - The primary aim of this study is to understand the role of ZrO2 in iron-cobalt-potassium (FeCoK) based catalysts for converting syngas to light olefins. Our findings reveal that ZrO2 support notably enhances the dispersion of Fe, Co, and K species, thus improving the reducibility of Fe2O3, Co3O4, and KNO3. This leads to increased medium and strong hydrogen adsorption and elevated medium basicity. At lower temperatures (300 °C and 320 °C), the space-time yield (STY) of hydrocarbons over FeCoK/ZrO2 is less than FeCoK due to the strong adsorption of intermediates by the increased basicity. However, at higher temperatures (360 °C and 380 °C), this trend reverses, indicating the high-temperature mitigates strong adsorption effects. The FeCoK/ZrO2 catalyst achieved the best STY of C2–C4 olefins of 13.2 mmol gcat −1 h−1 at 380 °C.

KW - Adsorption strength

KW - Hydrogenation

KW - Light olefins

KW - Syngas

KW - ZrO

UR - https://www.scopus.com/pages/publications/85184066067

U2 - 10.1016/j.mcat.2024.113901

DO - 10.1016/j.mcat.2024.113901

M3 - Article

AN - SCOPUS:85184066067

SN - 2468-8231

VL - 555

JO - Molecular Catalysis

JF - Molecular Catalysis

M1 - 113901

ER -

Role of ZrO₂ in enhancing FeCoK catalysts for syngas conversion to light olefins

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Keywords

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