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A Convergent Approach for a Deep Converting Lignin-First Biorefinery Rendering High-Energy-Density Drop-in Fuels

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Cao,  Zhengwen
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Dierks,  Michael
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Clough,  Matthew T.
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Barros Daltro de Castro,  Ilton
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Cao, Z., Dierks, M., Clough, M. T., Barros Daltro de Castro, I., & Rinaldi, R. (2018). A Convergent Approach for a Deep Converting Lignin-First Biorefinery Rendering High-Energy-Density Drop-in Fuels. Joule, 2(6), 1118-1133. doi:10.1016/j.joule.2018.03.012.


Cite as: http://hdl.handle.net/21.11116/0000-0001-BF66-6
Abstract
Herein, a lignin-centered convergent approach to produce either aliphatic or aromatic bio-hydrocarbons is introduced. First, poplar or spruce wood was deconstructed by a lignin-first biorefining process, a technique based on the early-stage catalytic conversion of lignin, yielding lignin oils along with cellulosic pulps. Next, the lignin oils were catalytically upgraded in the presence of a phosphidated Ni/SiO2 catalyst under H2 pressure. Notably, selectivity toward aliphatics or aromatics can simply be adjusted by changes in H2 pressure and temperature. The process renders two distinct main cuts of branched hydrocarbons (gasoline: C6-C10, and kerosene/diesel: C14-C20). As the approach is H2-intensive, we examined the utilization of pulp as an H2 source via gasification. For several biomass sources, the H2 obtainable by gasification stoichiometrically meets the H2 demand of the deep converting lignin-first biorefinery, making this concept plausible for the production of high-energy-density drop-in biofuels.