Isayeva L. Structural transformation of brown coal under the thermochemical influence

Brown coal. The studing of the structural and chemical transformation of the organic mass of brown coal on the different studies of pyrolisis pro- cess. The elementary, technical, functional analysises, DTA (Derivatograph - Q - 1500D), EPR (RE-1307), IR-spectroscopy (UR - 20), X-ray analysis (Dron - 2,0). The temperatural dependence of rates change of accumulation/expenditure of separate elements and oxygen-containing groups at the thermal and thermooxidative decomposition of brown coal has been established. It has been shown for the first time that during the period of basic decomposition the accumulation of COOH-, OH-, CO-groups, the expenditure of oxygen connecting with destruction of packages of carbon networks at the air and with the loosing of the packages in inest atmosphere took place. The methods of influence on the transformations of coal organic mass during the pyrolisis by means of the preliminary change of therminal oxygen-containing groups and ether bridges structure and ether bridges st ructure and composition are suggested. The results of the work are recommended to the use in the technologies of unfuel utilization of low-grade coal, in particulary, for prodaction of adsorbents.