Issue 3, 2020

Stability of monometallic Pt and Ru supported on hierarchical HZSM-5 nanosheets for hydrodeoxygenation of lignin-derived compounds in the aqueous phase

Abstract

Bio-oils obtained from the pyrolysis of lignin-derived biomass generally consist of various oxygenated compounds, eventually leading to poor quality as a fuel. Catalytic hydrodeoxygenation (HDO) is an essential step in bio-oil upgrading to increase its quality by oxygen removal in the form of water. Because water is the main solvent of a raw bio-oil, it is more practical to develop a catalytic system using water as a solvent in the HDO reaction. Herein, the stability of Pt supported on the HZSM-5 zeolite in a pressurized system (0.5–2 MPa) and in hot water (50–200 °C) was investigated. It was found that Pt supported on conventional and hierarchical ZSM-5 showed good stability in the temperature range of 50 to 150 °C and in the pressure range of 0.5 to 1 MPa. In addition, we report the catalytic performance of hydrodeoxygenation (HDO) of 4-propylphenol as a bio-oil model compound using developed monometallic Pt or Ru on HZSM-5 nanosheets compared with conventional HZSM-5 in the aqueous phase with 1 MPa of H2 at 110 °C. The catalytic performances along with the catalytic stability under hot liquid water and pressure conditions were systematically investigated. The results clearly demonstrate that monometallic Pt/HZSM-5 exhibits almost 100% conversion of 4-propylphenol. The main products were propylcyclohexanol (∼64%, which is the hydrogenated product) and propylcyclohexane (∼30%). The catalysts are gradually degraded in the reaction for both Pt supported on conventional and hierarchical HZSM-5.

Graphical abstract: Stability of monometallic Pt and Ru supported on hierarchical HZSM-5 nanosheets for hydrodeoxygenation of lignin-derived compounds in the aqueous phase

Supplementary files

Article information

Article type
Paper
Submitted
09 sep. 2019
Accepted
05 nov. 2019
First published
06 nov. 2019

Sustainable Energy Fuels, 2020,4, 1126-1134

Stability of monometallic Pt and Ru supported on hierarchical HZSM-5 nanosheets for hydrodeoxygenation of lignin-derived compounds in the aqueous phase

S. Salakhum, K. Saenluang and C. Wattanakit, Sustainable Energy Fuels, 2020, 4, 1126 DOI: 10.1039/C9SE00773C

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