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Title: Solvent-Free Hydrodeoxygenation of Triglycerides to Diesel-like Hydrocarbons over Pt-Decorated MoO<inf>2</inf> Catalysts
Authors: Sisira Fangkoch
Sutida Boonkum
Sakhon Ratchahat
Wanida Koo-Amornpattana
Apiluck Eiad-Ua
Worapon Kiatkittipong
Wantana Klysubun
Atthapon Srifa
Kajornsak Faungnawakij
Suttichai Assabumrungrat
Chulalongkorn University
King Mongkut's Institute of Technology Ladkrabang
Silpakorn University
Thailand National Nanotechnology Center
Mahidol University
Synchrotron Light Research Institute
Keywords: Chemical Engineering;Chemistry
Issue Date: 1-Jan-2020
Citation: ACS Omega. (2020)
Abstract: Copyright © 2020 American Chemical Society. In the present work, the solvent-free hydrodeoxygenation of palm oil as a representative triglyceride model compound to diesel-like hydrocarbons was evaluated in a batch reactor using Pt-decorated MoO2 catalysts. The catalysts with various Pt loadings (0.5-3%) were synthesized by an incipient wetness impregnation method. The metallic Pt and MoO2 phases were detected in the XRD patterns of as-prepared catalysts after the reaction and acted as active components for the deoxygenation reactions. The XPS experiments confirmed the existence of metallic Pt and PtOx species. The XANES investigation of Mo L3-edge spectra elucidated a change in the valence state by the transformation of MoO3 into MoO2 species after the deoxygenation reaction. The TEM observation revealed the formation of Pt nanoparticles in the range of 1-3 nm decorated on MoO2 species. The number of acid sites increased with stronger metal-support interactions on increasing the Pt loading. The catalytic performance of the MoO2 catalyst significantly improved with a small amount of Pt decoration. However, the further increase in Pt loading did not relatively increase the deoxygenation activity due to the formation of the agglomerated Pt particles. The high performance of the decorated catalysts could be attributed to the moderate acidity from the Pt dispersed on MoO2 toward decarbonylation and decarboxylation reactions. ©
ISSN: 24701343
Appears in Collections:Scopus 2020

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