期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 15, 页码 12562-12579出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16185
关键词
heterogeneous catalysts; microalgae; hydrothermal liquefaction; cyclodextrin; biocrude
资金
- MIUR PRIN [2010H7PXLC_005]
- European Commission under project STAGE-STE FP7 [609837]
- European Regional Development Fund (ERDF)
- Conseil Regional du Haut de France
- CNRS
- Ministere de l'Education Nationale de l'Enseignement Superieur et de la Recherche
Hydrothermal liquefaction (HTL) is a promising technology for the production of biocrude oil from microalgae. Although this catalyst-free technology is efficient under high-temperature and high-pressure conditions, the biocrude yield and quality can be further improved by using heterogeneous catalysts. The design of robust catalysts that preserve their performance under hydrothermal conditions will be therefore very important in the development of biorefinery technologies. In this work, we describe two different synthetic routes (i.e., impregnation and cyclodextrin-assisted one-pot colloidal approach), for the preparation in aqueous phase of six high surface area CoMo/gamma-Al2O3 catalysts. Catalytic tests performed on the HTL of Nannochloropsis gaditana microalga indicate that solids prepared by the one-pot colloidal approach show higher hydrothermal stability and enhanced biocrude yield with respect to the catalyst-free test. The positive effect of the substitution of the block copolymer Tetronic T90R4 for Pluronic F127 in the preparation procedure was evidenced by diffuse reflectance UV-visible spectroscopy, X-ray diffraction, N-2-adsorption-desorption, and H-2-temperature-programmed reduction measurements and confirmed by the higher quality of the obtained biocrude, which exhibited lower oxygen content and higher-energy recovery equal to 62.5% of the initial biomass.
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