| 摘要 |
Controlling the xylose ratio of pretreated biomass The composition is produced by a process for the treatment of ligno-cellulosic biomass comprising the steps of: A) Soaking a ligno-cellulosic biomass feedstock in vapor or liquid water or mixture thereof at a first temperature and for a first time corresponding to a first severity factor to create a soaked biomass containing a dry content and a first liquid; B) Separating at least a portion of the first liquid from the soaked biomass to create a first liquid stream and a first solid stream; wherein the first solid stream comprises the soaked biomass; C) Steam exploding the first solid stream at a second temperature for a second time corresponding to a second severity factor to create a steam exploded stream comprising solids and a second liquid; D) Adding at least a fraction of the first liquid and a fraction of the second liquid to create the composition, wherein the sum of first severity factor and second severity factor is in the range between 5000 and 17000; and wherein: I. the ratio between xylooligomers content and the sum of xylose content and xylooligomers content is greater than 0,5; II. the ratio between the sum of xylose content and xylooligomers content and solubilized xylans content is greater than 0,35. |
