THE EFFECT OF LONG EXPOSURE OF BIRCH, ASPEN AND PINE SAWDUST IN WATER ON YIELD AND SPECIF-IC SURFACE AREA OF THE CARBON PRODUCT
The article presented researches concerning the effect of prolonged exposure in water of wood of different species - birch, aspen and pine, on the formation of carbon materials structure during carbonization. The possibility of using wood waste of different species, subject to long exposure in water, to obtain more porous carbon materials than using original wood is shown. It was established that the aging of different species in water stimulates the disclosure of the porous structure of the carbon product. This particularly applies to the carbon product of pine wood, the specific surface area which increases from 10 to 455 m2 g-1. It was shown that the yield of the carbon product, increases by 15-25 wt.% using wood prolonged exposure in water. Using XRD and electron microscopy, features of the structural transformation of birch, aspen and pine wood subjected to water treatment were revealed. Prolonged exposure of different wood species in the water affects the degree of crystallinity of the cellulose fiber in wood. The crystalline component of pine is exposed to the greatest destruction under the action of water. It was noted that after water treatment of wood, the part of the amorphous component in the carbon product increases, regardless of the type of wood used.