Kinetic analysis of cellulose depolymerization reactions in near critical water

Understanding biomass fractionation in subcritical & supercritical water

“…Regarding its composition, it is a biopolymer mainly composed of pentoses 97 with few hexoses in between, with a maximum length around 200 or 300 98 monomeric sugars, which makes it a renewable source of chemicals based on 5-99 carbon molecules. The maximum molecular weight is lower than 70 kDa in most 100 cases [3]. However, there are discrepancies between species.…”

“…The results of cellulose and biomass hydrolysis in supercritical water discussed in the main 1509 manuscript [1][2][3][4][5][6][7] were performed in the continuous plant of the FASTSUGARS process, able to 1510 hydrolyze biomass in SCW at temperatures up to 400 ºC and pressures up to 30 MPa. A scheme 1511 of the experimental set-up designed by the High Pressure Processes Group is shown in Figure 1512 S2.…”

Online integrated fractionation-hydrolysis of lignocellulosic biomass using sub- and supercritical water

“…The other alternative of glucose 365 conversion is the retro-aldol condensation producing glycolaldehyde and erythrose [32,44].…”

A green desuperheater for an energetic efficient alternative to the decompression valve in biomass supercritical water ultrafast hydrolysis process

“…For this reason, the study is presented over the base of a pressure-enthalpy diagram of water. This process has been extensively studied by Cantero et al , 2013a, 2013b, Danilo A. Cantero et al, 2015a, 2015b However, different alternatives as the STIG (Steam Injection Gas Turbine) process , or the implementation of water turbines and pressure recovery devices in the liquid phase increase the global efficiency of the process. a lower amount or even none vapor can be generated by isoenthalpic expansion.…”

“…The accurate selection of the hydrolysis time is possible due to the instantaneous heating of the raw materials and cooling of the product stream (Piqueras et al, 2017). While in the inlet of the reactor, a suspension of biomass is mixed with supercritical water reaching instantaneously the reaction temperature, in the outlet of the reactor, the product stream is decompressed in a valve being instantaneously cooled, stopping the reaction and consequently avoiding the generation( of byproducts (Cantero et al, 2013a). Therefore, the hydrolysis time is simply the residence time of the fluid inside the reactor.…”