Artikkelit kirjoittajalta Jussi Ranta
Turpeen maatumisasteen ja termoanalyyttisen informaation vertailu.
English title: A comparison between the decomposition degree of peat and thermoanalytical information.
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In the study, comparisons were made between the decomposition degree of peat deternimed in accordance with GOST-10650-72 standard, and DTG peaks for peat. When a peat sample of 15 mg and a heating rate of 10°C/min were used, peaks were observed in temperature areas of 310 to 325°C and 415 to 435°C. The former area presents the oxidation of sugars and cellulosic material. The height of the peak correlates with the degree of decomposition, the correlation coefficient being —0,92 (n=10). When the decomposition values were compared with the height of the peak in the area of 415 to 435°C, a value of 0,73 was obtained for the correlation coefficient. When the ratio of the peak heights was compared with the decomposition degree, a value of —0,94 was obtained. Hence- the decomposition degree of peat can be determined fairly reliably by aid of thermogravimetric measurements, if the contents of thermal changes are known adequately accurately.
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Ranta,
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