Three complementary Kraft lignins and a Soda lignin were characterized by NMR (31P, 13C, HSQC) GPC. Their theoretical yield in monomers (TMY) assuming complete cleavage of all ?-O-4 linkages was calculated based on these analyses. The most recalcitrant according to the TMY criteria depolymerized supercritical ethanol (250 °C, H2, 110 bar) with Pt/C, Ni/C, Ru/C catalysts. All catalysts present a...
