Biphasic supercritical carbon dioxide-water pretreatment of lignocellulosic biomass

摘要

A process for pretreatment of a biomass material, comprising subjecting a biomass material to a biphasic mixture of water and supercritical CO2 at a temperature in the range of 150° C. to 250° C. under high pressure for a time of from 10 seconds to 100 minutes. In particular embodiments, the process is performed as a two-stage temperature process wherein an initial short high-temperature stage is conducted at a temperature of at least 200° C. for up to 20 minutes and a subsequent longer low-temperature stage is conducted at a temperature of at least 140° C. and up to 190° C. for 10-120 minutes.

主权项

1. A process for pretreatment of a biomass material, comprising subjecting a biomass material to a biphasic mixture of water and supercritical CO2 under high pressure in a two-stage temperature process wherein an initial short high-temperature stage is conducted at a temperature of at least 200° C. for up to 20 minutes and a subsequent longer low-temperature stage is conducted at a temperature of at least 150° C. and up to 190° C. for 10-120 minutes to provide a pre-treated biomass material, and subjecting the pre-treated biomass material to enzymatic hydrolysis to produce monosaccharides, wherein said enzymatic hydrolysis results in a sugar yield of at least 50% and a furfural yield of no more than 20%.