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Table 5 Comparison between microwave-assisted batch and fast heating rate flow-through reaction systems: effect of processing time on the product yields (%w/w)

From: Autohydrolysis pretreatment of Arundo donax: a comparison between microwave-assisted batch and fast heating rate flow-through reaction systems

Reaction conditions Xtot (%) Monomer yield Oligomer/polymer yield Degradation product yield
Exp. T (°C) t (min) τ (min) Q (mL/min) Mb/Vw (g/L) Log (KSFS) Log (KSFL) YGlu (%) YXyl (%) YArab (%) YASL (%) Yolig(Cell) (%) Yolig(Hemi) (%) YAcet (%) YLev (%) YHMF (%) YF (%) YFA (%)
2FT 200 20 4.3 7.0 50 4.25 3.58 40.3 0.4 4.6 0.9 9.7 1.7 24.0 0.6 0.0 0.0 0.2 0.0
3FT 200 40 8.6 3.5 50 4.55 3.88 44.5 2.7 9.5 0.9 6.5 3.4 9.4 4.9 0.0 0.7 0.9 1.7
4FT 200 20 8.6 3.5 100 4.25 3.88 34.1 0.6 7.9 0.9 4.3 1.4 16.0 1.7 0.0 0.0 0.7 0.6
2MW 200 20 50 4.25 4.25 34.0 1.8 9.8 3.2 4.5 2.3 4.5 0.5 1.4 <0.1 0.0 0.0
3MW 200 40 50 4.55 4.55 35.0 3.9 8.0 0.0 8.3 0.0 0.0 0.0 6.0 0.3 1.1 0.0
4MW 200 20 100 4.25 4.25 30.0 1.5 9.0 1.3 3.2 1.0 1.3 0.0 2.7 0.0 0.7 0.0
  1. τ average residence time, Q water flow rate, M b /V w biomass to water ratio (w/vol), KSF S kinetic severity factor for the solid phase, KSF L kinetic severity factor for the liquid phase, X tot total solubilized fraction of the initial biomass calculated by Eq. 8, Glu glucose, Xyl xylose, Arab arabinose, ASL acid-soluble lignin, Cell cellulose, Hemi hemicellulose, Acet acetic acid, Lev levulinic acid, HMF hydroxymethilfurfural, F furfural, FA formic acid