Development of a Continuous-flow Reactor System for Rapid Reactions of Monosaccharides in Sub- and Supercritical Water at Pressures above 50MPa

摘要

This work reviews some of our progress in developing continuous-flow reactor systems for rapid reactions in sub- and supercritical water at pressures above 50 MPa.Key feature of the reactor system described in this work are specialized high-pressure components and the mixing of solutions in a swirl-injection mixer to achieve rapid heating to reaction conditions of 673 K at high-pressures.The residence time in the tubular reactor was less ls.Monosaccharide (D-glucose or D-fructose) solutions were studied and their reaction schemes have been elucidated.Increasing the pressure to values greater than 70 MPa enhances dehydration reactions of D-glucose to 5-hydroxymethylfurfural (5-HMF),which shows that water density can have a significant effect on conversion chemistry of monosaccharide and probably biomass-related compounds.