Journal
CATALYSIS COMMUNICATIONS
Volume 169, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2022.106478
Keywords
Spray pyrolysis; Core-shell; Hydrodeoxygenation; Al2O3; Microspheres; Palmitic acid
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Funding
- Engineering Research Center of Excellence Program of the National Research Foundation of Korea (NRF) [NRF-2021R1A5A6002853]
- Vietnam National Foundation for Science and Technology Development [104.05-2020.32]
- Industrial University of Ho Chi Minh, Vietnam
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This study successfully prepared γ-Al2O3 microspheres incorporating high levels of Mo catalyst using ultrasonic-assisted spray pyrolysis. The microspheres were then decorated with a hydrophobic TiO2 layer, forming core-shell-structured catalysts. The prepared catalysts exhibited excellent catalytic activity and stability.
Developing highly active and stable hydrodeoxygenation (HDO) catalysts is an industrial challenge. In this work,gamma-Al2O3 microspheres incorporating high levels of Mo catalyst (30 wt%; MoO3@Al2O3) were effectively and rapidly prepared by ultrasonic-assisted spray pyrolysis. The MoO3@Al2O3 microspheres were then decorated by a hydrophobic TiO2 layer to obtain core-shell-structured microspheres dubbed MoO3@Al2O3@TiO2. HDO experiments revealed that catalysis by reduced MoO3@Al2O3@TiO2 microspheres afforded similar to 96% palmitic acid (PA) conversion and similar to 67% hydrocarbon selectivity, surpassing the uncoated catalyst. Furthermore, the prepared TiO2-coated MoO3@Al2O3 microspheres retained excellent HDO catalytic activity under water-containing feed for 24 h. This study's results suggest that combining spray pyrolysis and coating with a TiO2 shell produces a synergetic effect that enhances the catalyst's activity and stability.
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