【摘要】 选取典型的烟煤、无烟煤和贫煤3种原煤样品,采用差示扫描量热法对其在1 200℃以下的比热容进行了测定,并对同一煤样在不同质量、不同升温速度和不同载气流量等实验条件下样品比热容的测定进行了分析。结果表明:随着温度的升高,煤的比热容逐渐增大;低温时无烟煤的比热容最小,高温时烟煤的比热容最大。优化和确定了比较适宜的测试煤比热容的实验条件:质量20 mg、加热速率10℃/min、载气流量20mL/min。更多还原

【Abstract】 The specific heat of typical bituminite,anthracite and lean coal was measured below the temperature 1200℃ with the differential scaning calorimeter(DSC).The influence on specific heat with same coal in different mass,heating rate and flow is studied.The results show that the specific heat of coal increases with the temperature;the specific heat of anthracite is the lowest at low temperature,the specific heat of bituminite is the highest at high temperature.The experimental condition has been optimized and confirmed for measuring specific heat of coal as follows: mass is 20mg,heating rate is 10℃/min and flow is 20mL/min.更多还原