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Keywords:

  • biomass;
  • formic acid;
  • high temperature and pressure water;
  • reactor wall;
  • reduction

Abstract

The processing of renewable feedstocks to platform chemicals and, to a lesser degree, fuels is a key part of sustainable development. In particular, the combination of lignocellulosic biomass with hydrothermal upgrading (HTU), using high temperature and pressure water (HTPW), is experiencing a renaissance. One of the many steps in this complicated process is the in-situ hydrogenation of intermediate compounds. As formic acid and related low-molecular-weight oxygenates are among the species generated, it is conceivable that they act as a hydrogen source. Such hydrogenations have been suggested to be catalyzed by water, by bases like NaOH, and/or to involve “reactive/nascent hydrogen”. To achieve the temperatures and pressures required for HTU, it is necessary to conduct the reactions in high-pressure vessels. Metals are typical components of their walls and/or internal fittings. Here, using cyclohexanone as a model compound for more complex biomass-derived molecules, iron in the wall of high-pressure stainless steel reactors is shown to be responsible for the hydrogenation of ketones with low-molecular-weight oxygenates acting as a hydrogen source in combination with water.

Featured Compounds

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  1. 1 - 3
Compound 1
Molecular Weight:98.143
Molecular Formula:C6H10O
InChIKey:Not Available
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Compound 2
Molecular Weight:100.1589
Molecular Formula:C6H12O
InChIKey:Not Available
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Compound 3
Molecular Weight:82.1436
Molecular Formula:C6H10
InChIKey:HGCIXCUEYOPUTN-UHFFFAOYSA-N
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