应用同步热分析仪确定小麦秸秆热解需热量

为了解决生物质热解过程需热量的定量问题，该文应用热重—差示扫描（TG/DSC）同步热分析仪对小麦秸秆进行了热解实验研究。将约5 mg的小麦秸秆粉样品装入带盖的铂铑坩锅中，放在热解炉中的DSC-cp高精度样品支架上，在流量为25 mL/min的高纯氮气吹扫下，以10 K/min的升温速率从常温升至973 K，记录生物质的热重(TG)曲线和差示扫描(DSC)曲线。通过对实验所得微分热重(DTG)曲线和DSC曲线对比分析，对小麦秸秆热解过程进行了详细的探讨。在DSC曲线上扣除水分的影响后对其积分得出热解过程需热量的规律。结果表明，要使1 kg干小麦秸秆完成从常温303 K到673 K，773 K，873 K的升温和热解，所需的总热量分别为523 kJ，558 kJ，592 kJ。

Caloric requirement determination of biomass pyrolysis using simultaneous thermal analyzer

In order to determine the caloric requirement of biomass pyrolysis, simultaneous thermal analyzer was used for experiments of wheat straw pyrolysis. Powder biomass sample about 5 mg was put into Platinum crucible with lid on a high accuracy DSC-cp sample holder in the furnace. And then the sample was heated from ambient temperature up to the maximum temperature of 973 K at the heating rate of 10 K/min. The product gases were swept away by 25N mL/min Nitrogen. Mass change and calorimetric effects were recorded and analyzed. The process was investigated in detail through the comparison of DTG (differential thermal gravimetry)and DSC (differential scanning calorimetry) curves. And after the water influence in the DSC curve was eliminated, the relationship between caloric requirement and the temperature of the dry wheat straw was obtained by integrating the DSC curve. Result showed that 523 kJ, 558 kJ, 592.0 kJ were required respectively to make the temperature of 1 kg dry wheat straw raise from 303 K to 673 K,773 K, 873 K.