Roles of Al2O3 promoter for an enhanced structural stability of ordered-mesoporous Co3O4 catalyst during CO hydrogenation to hydrocarbons

Hyun Mo Koo; Chang Il Ahn; Dong Hyun Lee; Hyun Seog Roh; Chae Ho Shin; Hyoungsan Kye; Jong Wook Bae

doi:10.1016/j.fuel.2018.03.175

Roles of Al₂O₃ promoter for an enhanced structural stability of ordered-mesoporous Co₃O₄ catalyst during CO hydrogenation to hydrocarbons

Hyun Mo Koo, Chang Il Ahn, Dong Hyun Lee, Hyun Seog Roh, Chae Ho Shin, Hyoungsan Kye, Jong Wook Bae

Division of Environmental Engineering

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

14 Citations (Scopus)

Abstract

A crucial contribution of Al₂O₃ pillar for an enhanced structural stability of a highly ordered mesoporous Co₃O₄ (Al/m-Co) for CO hydrogenation activity was verified in terms of newly formed stable phases with their interactions. At an optimal 5 wt%Al₂O₃ on the Al/m-Co, the activity and stability of Fischer-Trospch synthesis (FTS) reaction were largely enhanced by preserving the highly ordered original mesoporous Co₃O₄ structures due to the newly formed strong Al₂O₃-Co₃O₄ interactions with the partial formation of the catalytically inactive spinel-type CoAl₂O₄ phases in the matrices of the mesoporous Al/m-Co. The main roles of the Al₂O₃ pillar on the Al/m-Co were a structural promoter to maintain the highly ordered mesoporous Co₃O₄ structures by easily removing the heavy hydrocarbons formed during FTS reaction without significant coke depositions through those large mesopores. The homogeneously distributed Al₂O₃ pillaring material less than monolayer on the Al/m-Co surfaces played a crucial role to preserve the original ordered mesoporous Co₃O₄ structures through the partial formation of outer surface CoAl₂O₄ phases with less blockages of active metallic cobalt sites by heavy coke precursors formed.

Original language	English
Pages (from-to)	460-471
Number of pages	12
Journal	Fuel
Volume	225
DOIs	https://doi.org/10.1016/j.fuel.2018.03.175
Publication status	Published - 2018 Aug 1

Bibliographical note

Funding Information:
The authors would like to acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1D1A1B03028214 and 2018M3D3A1A01018009). The present work was also supported by the R&D Center for Valuable Recycling (Global-Top R&D Program) of the Ministry of Environment of Korea (Project No. RE201606017). This work was also supported by “Next Generation Carbon Upcycling Project” (2017M1A2A2043135) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea.

Publisher Copyright:
© 2018

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

Access to Document

10.1016/j.fuel.2018.03.175

Cite this

@article{46098ab27d5c4abf9413ff90a7d24db9,

title = "Roles of Al2O3 promoter for an enhanced structural stability of ordered-mesoporous Co3O4 catalyst during CO hydrogenation to hydrocarbons",

abstract = "A crucial contribution of Al2O3 pillar for an enhanced structural stability of a highly ordered mesoporous Co3O4 (Al/m-Co) for CO hydrogenation activity was verified in terms of newly formed stable phases with their interactions. At an optimal 5 wt%Al2O3 on the Al/m-Co, the activity and stability of Fischer-Trospch synthesis (FTS) reaction were largely enhanced by preserving the highly ordered original mesoporous Co3O4 structures due to the newly formed strong Al2O3-Co3O4 interactions with the partial formation of the catalytically inactive spinel-type CoAl2O4 phases in the matrices of the mesoporous Al/m-Co. The main roles of the Al2O3 pillar on the Al/m-Co were a structural promoter to maintain the highly ordered mesoporous Co3O4 structures by easily removing the heavy hydrocarbons formed during FTS reaction without significant coke depositions through those large mesopores. The homogeneously distributed Al2O3 pillaring material less than monolayer on the Al/m-Co surfaces played a crucial role to preserve the original ordered mesoporous Co3O4 structures through the partial formation of outer surface CoAl2O4 phases with less blockages of active metallic cobalt sites by heavy coke precursors formed.",

author = "Koo, {Hyun Mo} and Ahn, {Chang Il} and Lee, {Dong Hyun} and Roh, {Hyun Seog} and Shin, {Chae Ho} and Hyoungsan Kye and Bae, {Jong Wook}",

note = "Funding Information: The authors would like to acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1D1A1B03028214 and 2018M3D3A1A01018009). The present work was also supported by the R&D Center for Valuable Recycling (Global-Top R&D Program) of the Ministry of Environment of Korea (Project No. RE201606017). This work was also supported by “Next Generation Carbon Upcycling Project” (2017M1A2A2043135) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea. Publisher Copyright: {\textcopyright} 2018",

year = "2018",

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doi = "10.1016/j.fuel.2018.03.175",

language = "English",

volume = "225",

pages = "460--471",

journal = "Fuel",

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TY - JOUR

T1 - Roles of Al2O3 promoter for an enhanced structural stability of ordered-mesoporous Co3O4 catalyst during CO hydrogenation to hydrocarbons

AU - Koo, Hyun Mo

AU - Ahn, Chang Il

AU - Lee, Dong Hyun

AU - Roh, Hyun Seog

AU - Shin, Chae Ho

AU - Kye, Hyoungsan

AU - Bae, Jong Wook

N1 - Funding Information: The authors would like to acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1D1A1B03028214 and 2018M3D3A1A01018009). The present work was also supported by the R&D Center for Valuable Recycling (Global-Top R&D Program) of the Ministry of Environment of Korea (Project No. RE201606017). This work was also supported by “Next Generation Carbon Upcycling Project” (2017M1A2A2043135) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea. Publisher Copyright: © 2018

PY - 2018/8/1

Y1 - 2018/8/1

N2 - A crucial contribution of Al2O3 pillar for an enhanced structural stability of a highly ordered mesoporous Co3O4 (Al/m-Co) for CO hydrogenation activity was verified in terms of newly formed stable phases with their interactions. At an optimal 5 wt%Al2O3 on the Al/m-Co, the activity and stability of Fischer-Trospch synthesis (FTS) reaction were largely enhanced by preserving the highly ordered original mesoporous Co3O4 structures due to the newly formed strong Al2O3-Co3O4 interactions with the partial formation of the catalytically inactive spinel-type CoAl2O4 phases in the matrices of the mesoporous Al/m-Co. The main roles of the Al2O3 pillar on the Al/m-Co were a structural promoter to maintain the highly ordered mesoporous Co3O4 structures by easily removing the heavy hydrocarbons formed during FTS reaction without significant coke depositions through those large mesopores. The homogeneously distributed Al2O3 pillaring material less than monolayer on the Al/m-Co surfaces played a crucial role to preserve the original ordered mesoporous Co3O4 structures through the partial formation of outer surface CoAl2O4 phases with less blockages of active metallic cobalt sites by heavy coke precursors formed.

AB - A crucial contribution of Al2O3 pillar for an enhanced structural stability of a highly ordered mesoporous Co3O4 (Al/m-Co) for CO hydrogenation activity was verified in terms of newly formed stable phases with their interactions. At an optimal 5 wt%Al2O3 on the Al/m-Co, the activity and stability of Fischer-Trospch synthesis (FTS) reaction were largely enhanced by preserving the highly ordered original mesoporous Co3O4 structures due to the newly formed strong Al2O3-Co3O4 interactions with the partial formation of the catalytically inactive spinel-type CoAl2O4 phases in the matrices of the mesoporous Al/m-Co. The main roles of the Al2O3 pillar on the Al/m-Co were a structural promoter to maintain the highly ordered mesoporous Co3O4 structures by easily removing the heavy hydrocarbons formed during FTS reaction without significant coke depositions through those large mesopores. The homogeneously distributed Al2O3 pillaring material less than monolayer on the Al/m-Co surfaces played a crucial role to preserve the original ordered mesoporous Co3O4 structures through the partial formation of outer surface CoAl2O4 phases with less blockages of active metallic cobalt sites by heavy coke precursors formed.

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