Gamma-valerolactone is a valuable
chemical that can be obtained
by catalytic methods from nonedible vegetable biomass. However, the
demand is felt for more environmentally friendly and cost-effective
production processes. The topic is reviewed in this paper from the
perspective of catalyst design. Focus is on those systems enabling
one-pot reaction sequences in the liquid phase at low energy expenses
and combining metal and acid sites, spanning from homogeneous to heterogeneous
catalysts. A final section is dedicated to continuous flow applications.
The 230 references cover the most significant achievements published
in the literature from January 2011 to July 2014 and highlight critical
issues and future trends.
A bifunctional heterogeneous catalyst based on sulfonated cation exchange resin and embedded Ru nanoparticles shows complete conversion and selectivity at low temperatures and H 2 pressure in the direct, one-pot conversion of levulinic acid to GVL under continuous flow conditions, with excellent durability and no need for additives.
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