中文摘要：

采用pulsecalorimeter仪器,分别研究了低温下低阶煤在湿的氮气气氛下凝结热与蒸发热间的热力学规律,以及在湿的氧气气氛下反应热与蒸发热间的热力学规律;还研究了低阶煤在干燥氧气下经三次低温氧化反应的热力学规律.结果表明,在湿的氮气下,凝结热和蒸发热均随温度的增加而减少,在温度299.15K-323.15K范围内,凝结热明显大于蒸发热值,随着温度增加二者差值变小;在湿氧气气氛下,随温度增加,反应热先减少后增加,其蒸发热与湿氮气条件相比,二者的热值及热力学规律基本相同;低阶煤经三次低温氧化反应过程,其中二、三次氧化反应的反应热与第一次相比显著降低.

英文摘要：

The thermodynamic law between the condensation heat and vaporization heat as well as between the reaction heat and vaporization heat is studied during low temperature oxidation of low rank using pulse calorimeter. The thermodynamic law of low temperature oxidation of low rank coal through thrice dry oxygen pulse also is investigated in this paper. The experimental results indicate that both the condensation heat and vaporization heat decrease with temperature under wet nitrogen. The condensation heat is higher than the vaporization heat at temperature of 299 K to 323 K and the difference between the condensation heat and vaporization heat decrease with increase of temperature. Under wet oxygen, the exothermic effect of the process decrease with increase of temperature at first, then increase with temperature. The thermodynamic law of the vaporization heat between wet oxygen and wet nitrogen is basic same. The reaction＇heat of low temperature oxidation decrease remarkably after low rank coal goes through thrice dry oxygen pulse.