Biocrude production by catalytic hydrothermal liquefaction of wood chips using NiMo series catalysts

In this work, hydrothermal liquefaction of wood chips was studied for biocrude production using a mix of Ni–Mo nitrides and carbides. The catalytic materials were synthesized by a temperature-programmed reaction method at 800 °C under a hydrogen atmosphere with nickel loads from 0 to 20 wt%. Lignin...

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Bibliographic Details
Published in:International journal of hydrogen energy 2022-08, Vol.47 (70), p.30160-30171
Main Authors: Malpica-Maldonado, J.J., Martínez-Salazar, A.L., Portales-Martínez, B., Coronel-García, M.A., Salazar-Cerda, Y.
Format: Article
Language:English
Subjects:
Hydrothermal liquefaction
Lignocellulosic biomass
Mo2C
Ni2Mo3N
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Summary:In this work, hydrothermal liquefaction of wood chips was studied for biocrude production using a mix of Ni–Mo nitrides and carbides. The catalytic materials were synthesized by a temperature-programmed reaction method at 800 °C under a hydrogen atmosphere with nickel loads from 0 to 20 wt%. Lignin contained in the lignocellulosic biomass was successfully release via Kraft process. Hydrothermal liquefaction was carried out in a batch reactor at 320 °C with an initial pressure of 1000 psi of H2. According to characterization results, nanostructured catalysts with a mix of Ni2Mo3N/Mo2C compo4unds were obtained. NiMo series catalysts composition varies with nickel loads. The catalytic activity shows a reduction in the amount of solid products and an increase in the production of gaseous products as a function of the increase Ni loadings on the catalyst. The most optimal production of biocrude was obtained with the NiMo-10 catalyst, since 81.43% of the total product corresponded to water soluble products (WPS) fraction and the oil fraction, while the solids fraction represented the 6.43% of the total product. Hydrothermal liquefaction catalytic processes were selective towards WSP fraction, improving biocrude quality and favoring biocrude conversion into advanced biofuels. •Nanostructured catalysts with mixtures of Mo2C and Ni2Mo3N were obtained.•Ni2Mo3N composition in NiMo series increase with the increment of nickel load.•Lignin contained in the biomass was successfully release via Kraft process.•NiMo series catalysts exhibited high selectivity towards WSP fraction.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2022.06.109