2-19　Effect of water on low temperature oxidation for coal

Generated gas analysis

Abstract

To clarify the reaction between water and coal for the purpose of elucidating the coal spontaneous exothermic phenomenon, experiments were conducted using H₂¹⁷O. Coal and H₂¹⁷O were treated at 40-80°C in an O₂ atmosphere. The gases generated were quantified by a high-resolution mass spectrometer. The results showed that about half of the CO and CO₂ generated contained ¹⁷O even at the low temperature of 40°C, suggesting that the influence of chemical reaction with water in the coal spontaneous exothermic phenomenon is significant.