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Zawartość części lotnych w węglach kamiennych : parametr nie tylko chemiczno-technologiczny

Sivek M., Jirásek J., Hýlová L., Mirkowski Z.

Przegląd Geologiczny

2018

Vol. 66, nr 8

477--480

The volatile matter content is one of the most common chemical-technological parameters that have been determined for the vast majority of samples taken from the bituminous coal seams for more than 100 years. Its meaning is essentially triple. The oldest and also most well-known is its use for the determination of the degree of coalification (rank) of coal, but also of certain chemical-technological properties of coal (especially cokeability). With the development of coal geology and sedimentology, as well as the increasing importance of energy raw materials in the nation's economy, new ways ofusing the values of the volatile matter content have emerged. One of them was the study of the history of geological development of sedimentary, especially coal basins, the management of the mining industry economy, as well as the assessment andformulation of raw materials policy of the state. From a test originally designed to assess the suitability ofcoalfor coking, it has become a parameter used in the field of geology, economy and raw materials policy of the state.

Comprehensive study on bituminous coal oxidation by TGA–DTA–FTIR experiment

Zhang H., Gao E., Zhang X.

Journal of Power Technologies

2015

Vol. 95, nr 3

167--174

The spontaneous combustion of coal can have serious consequences. Bituminous coal is especially problematic as it produces a large amount of smoke comparative to other coals. Variable heating rate thermogravimetry analysis–differential thermal analysis–Fourier transform infrared spectroscopy experiments (TGA–DTA–FTIR) were conducted on three kinds of bituminous coals to study the change rule of weight, heat, and generated gas during the entire oxidation process from slow self-heating to burn out. Experimental results indicate that weight, heat, and gas release are in mutual correspondence at stages 1-4 in the oxidation process. However, change in generated gas lags behind weight and heat changes in the last stage. The main gas products of the oxidation process are CO, CO2, H2O, and CH4.The process of gas release depends on the reaction characteristics of related active structures. The concentration of generated gas from the same coal is CO2>H2O>CO>CH4. CO2 accounts for about 90% of the total amount of gas. The relationships between absorbance and temperature of generated gases in the rapid generation stage are linear or binomial, R2 are higher than 0.95. A comparison of the experimental results on different bituminous coals shows that when volatile matter is high, the characteristic temperatures are low and the concentration of generated gas and rate of heat release are high.

Zabezpieczenie zbiorników naziemnych przed emisją lotnych węglowodorów do atmosfery

Ziółko J.

Konstrukcje Stalowe

2003

nr 2

35-37