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

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8 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 languageEnglish
Pages (from-to)460-471
Number of pages12
JournalFuel
Volume225
DOIs
Publication statusPublished - 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.

All Science Journal Classification (ASJC) codes

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

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