Upgrading Lignocellulosic Products to Drop-In Biofuels via Dehydrogenative Cross-Coupling and Hydrodeoxygenation Sequence

ChemSusChem. 2015 Aug 24;8(16):2609-14. doi: 10.1002/cssc.201500754. Epub 2015 Jul 21.

Abstract

Life-cycle analysis (LCA) allows the scientific community to identify the sources of greenhouse gas (GHG) emissions of novel routes to produce renewable fuels. Herein, we integrate LCA into our investigations of a new route to produce drop-in diesel/jet fuel by combining furfural, obtained from the catalytic dehydration of lignocellulosic pentose sugars, with alcohols that can be derived from a variety of bio- or petroleum-based feedstocks. As a key innovation, we developed recyclable transition-metal-free hydrotalcite catalysts to promote the dehydrogenative cross-coupling reaction of furfural and alcohols to give high molecular weight adducts via a transfer hydrogenation-aldol condensation pathway. Subsequent hydrodeoxygenation of adducts over Pt/NbOPO4 yields alkanes. Implemented in a Brazilian sugarcane biorefinery such a process could result in a 53-79% reduction in life-cycle GHG emissions relative to conventional petroleum fuels and provide a sustainable source of low carbon diesel/jet fuel.

Keywords: greenhouse gas; heterogeneous catalysis; hydrodeoxygenation; hydrotalcite; life-cycle analysis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alcohols / chemistry*
  • Biofuels*
  • Furaldehyde / chemistry*
  • Gasoline
  • Hydrogenation
  • Lignin / chemistry*
  • Saccharum

Substances

  • Alcohols
  • Biofuels
  • Gasoline
  • lignocellulose
  • Lignin
  • Furaldehyde