A pretreatment process for wood based on ionic liquids

  • Ein Aufschlussverfahren für Holz basierend auf ionischen Flüssigkeiten

Viell, Jörn; Marquardt, Wolfgang (Thesis advisor)

Als Ms. gedr.. - Aachen : Publikationsserver der RWTH Aachen University (2014)
Dissertation / PhD Thesis

In: Fortschritt-Berichte VDI : Reihe 3, Verfahrenstechnik 942
Page(s)/Article-Nr.: XI, 200 S. : Ill., graph. Darst.

Zugl.: Aachen, Techn. Hochsch., Diss., 2014


The future chemical utilization of biomass as a renewable raw material requires a pretreatment to gain access to these macromolecules. This work describes the systematic development of such a pretreatment process using ionic liquids to convert wood into fermentable sugars. During the exploration of the effects of several ionic liquids on wood, a disintegration effect is discovered in this work, which is identified as the most promising pretreatment mechanism. Its benefit is demonstrated by a high yield of 65% of sugars after a short enzymatic hydrolysis. Moreover, the experimental results are exploited in a process simulation to assess the energy demand and the economic prospect of the developed pretreatment concept. This analysis identifies advantages and bottlenecks of the biomass pretreatment with concentrated solvents such as ionic liquids. A discussion outlines the challenges to be tackled by further research to tailor pretreatment processes to biomass and economy.