Extraction of hemicelluloses from poplar, Populus tremuloides, using an extruder-type twin-screw reactor: A feasibility study

Xylan and xylan derivatives - biopolymers with valuable properties, 1. Naturally occurring xylans structures, isolation procedures and properties

“…However, the treatment with concentrated ammonia in the first step increased significantly the xylan extractability in a following extraction step using dilute sodium hydroxide. The use of an extruder-type twin-screw reactor makes the extraction of hemicelluloses more feasible 90) . An interesting alternative to the alkaline procedures is presented by the steaming or hot water treatments of hardwoods and fibers.…”

Sugarcane and Woody Biomass Pretreatments for Ethanol Production

“…Twin-screw extruders were also used as extractors of lipids [74] and essential oils [75]. The extraction of hemicelluloses via alkaline solubilization using a twin-screw extruder for pentose production from the hardwood Populus tremuloides was also reported [76]. The major advantage of using twin-screw for extraction of biomass compounds is that kneading and reverse screw elements can cause severe compression of the material and allow the simultaneous extraction and liquid/solid separation in a very efficient manner.…”

“…These functions can be performed in the same process, depending on the size of the extruder and the screw design. Since the 1990s, there has been an increase in the number of studies that use extrusion for biomass processing, such as for the extraction of compounds [74][75][76], densification [73,77] and biomass pretreatment for enzymatic saccharification [78][79][80][81][82][83][84][85][86][87]. For lignocellulosic biomass pretreatment, extrusion processing can provide a unique continuous reactor working at higher throughput and solid levels.…”

A highly efficient dilute alkali deacetylation and mechanical (disc) refining process for the conversion of renewable biomass to lower cost sugars

“…Our previous work has shown that the enzymatic digestibility of low severity dilute acid pretreated corn stover is significantly improved by mechanical refining using PFI milling, twin screw extrusion, disc refining and/or Szego milling [29]. Among those refining techniques, screw extrusion is studied extensively in the literature [30][31][32][33][34][35][36]. Although the digestibility of screw-extruded biomass is comparable to other pretreatment technologies, the application of screw extrusion on the commercial scale still remains questionable due to the high level of energy consumption and the capital investment required.…”