抄録
Microwave is capable of selectively heating solid catalysts which retain high dielectric loss, therefore, accelerating heterogeneous reactions at more benign bulk reaction condition than those operated by conventional heat conductive devices. Due to their high recalcitrance of biomass, the pretreatment or thermochemical treatment of lignocellulose is generally conducted under severe reaction. Microwave reaction is expected to reduce the apparent severity of these treatments. This paper presents hydrolysis of carbohydrates by using polyoxometalate cluster supported carbon POM-supported catalysts which were designed to exhibit high microwave absorption and hydrolytic activity for generation of mono and oligo saccharides from biomass. Polyoxometalate clusters were supported on activated carbons which exhibited significantly high dielectric loss tangent under hydrothermal condition by wet impregnation. These catalysts exhibited higher saccharification rate on hydrolysis of cellobiose and green macroalgae than conventional heating. By using the coaxial line method, the dielectric properties of the POM-supported catalysts were found important to obtain higher saccharification rate.
