PRODUCTION AND PROPERTIES OF OXIDATIVE-ORGANOSOLVENT
DOI:
https://doi.org/10.59957/jctm.v61.i4.2026.5Keywords:
Miscanthus × giganteus, oxidative-organosolv pulping, chemical composition, fiber length, mechanical properties, spent liquorAbstract
The article presents the results of research on the production of cellulose from non-wood plant raw material - Miscanthus giganteus stems - using the oxidative-organosolv pulping method. It was established that, in terms of the content of major components (cellulose and lignin), the raw material is comparable to wood, although it exhibits higher ash content and increased pentosan levels. Optimal delignification parameters in the acetic acid - water - hydrogen peroxide system at a temperature of 100°C and a duration of 180 min provide a cellulose yield of 57.92 % with a residual lignin content of 1.84 %. Morphological and fractional analysis revealed a decrease in fiber length after refining and an increase in the proportion of fine fractions. The experimental results substantiate the feasibility of using citric acid as a catalyst, with an optimal concentration of 0.5 % relative to the oven-dry weight of the raw material. It was determined that the residual concentration of peracetic acid after cooking is only 27 % of the initial level, which prevents the effective reuse of spent liquor in subsequent delignification of plant biomass. The obtained results confirm the potential of miscanthus as a promising raw material for pulp and paper production.
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