Influence of alkaline modification of cellulose-containing raw materials on the adsorption properties of thermolysis products

   Chemical modification of cellulose-containing raw materials (sawdust and buried wood) with sodium hydroxide was carried out. Based on the analysis of the IR spectra of the original and modified wood, it was found that as a result of treatment with sodium hydroxide, a decrease in the intensity of the absorption bands of carbonyl groups in the area is observed and an increase in the intensity of the absorption bands of carboxylate ions indicates the interaction of the sodium ion with N-carboxylmethyl and N-carboxyl groups. An analysis of the intensity of the absorption band of carbonyl groups in the region of 1740 cm showed a high rate of interaction with the studied wood samples. After 60 minutes of processing, about 80 % of the active groups react. Thermolysis of modified wood samples was carried out at a temperature of 400–500 °C with the ratio of components 1 : 1; 1 : 0,5; 1 : 1,5. It has been established that at an optimal ratio of 1 : 1 components in the studied temperature range, activated carbon with a well-developed micropore system is formed. The adsorption activity of iodine is about 70% and is at the level of commercial analogues of wood.

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