Date: Thursday, 27 June 2024
Time: 13:45 - 14:45 CEST
Session code 4DV.6
Biomass pre-treatment, combustion and production of intermediates
Temperature Dependence in CO2 Steam Explosion Pretreatment for Sugars Production of Industrial Hemp
Short Introductive summary
The industrial hemp with its high biomass yield per hectare has great potential for the production of ethanol. The investigation is carried out on preliminary chipped hemp fraction - the residue after mechanical separation of long fibers from hemp stems, which are characterized by a hardwood-like content of cellulose, hemicellulose and lignin, but with a very low bulk density of the material. Steam explosion pretreatment with and without CO2 impregnation are performed under different temperatures. The efficiency of the pretreatment is evaluated after cellulase hydrolysis. The potential of hemp residues for bioethanol production is found to be similar to that of straw stalks as a raw material. The classic steam explosion method leads to the same glucose yield after enzymatic treatment as after acid pretreatment, but with practically no formation of glucose and furfural during pretreatment stage. The CO2 steam explosion method provides the highest xylose yield in the pretreatment stage. Due to the mild acid conditions, that pretreatment can be carried out at a lower temperature, increasing the energy efficiency of the process.
Presenter
Ivo VALCHEV
University of Chemical Technology & Metallurgy, Pulp, Paper and Printing Arts Dpt.
Biographies and Short introductive summaries are supplied directly by presenters and are published here unedited
Co-authors:
I. Valchev, UCTM, Sofia, BULGARIA
V. Toteva, UCTM, Sofia, BULGARIA
Session reference: 4DV.6.19