CAJ | 학술논문

采用热重-差示量热扫描法（ TG-DSC）测量了生物质和一次热解焦炭及不同转化率下半焦的比热容，建立了计算半焦比热容的数学模型并与实验测量结果进行了对比。结果表明，生物质样品和热解焦炭的比热容在60～200℃随温度升高而线性增大。生物质焦炭的比热容低于生物质样品的比热容，从60℃时的1．2 J/（g· K）增大到200℃附近的1．8～2．0 J/（g· K）。生物质半焦比热容随热解转化率的提高而降低。由半焦比热容数学模型计算得到的结果在接近150～200℃时与实验测定的半焦比热容数值基本一致。
채용열중-차시량열소묘법（ TG-DSC）측량료생물질화일차열해초탄급불동전화솔하반초적비열용，건립료계산반초비열용적수학모형병여실험측량결과진행료대비。결과표명，생물질양품화열해초탄적비열용재60～200℃수온도승고이선성증대。생물질초탄적비열용저우생물질양품적비열용，종60℃시적1．2 J/（g· K）증대도200℃부근적1．8～2．0 J/（g· K）。생물질반초비열용수열해전화솔적제고이강저。유반초비열용수학모형계산득도적결과재접근150～200℃시여실험측정적반초비열용수치기본일치。
The specific heat capacities of chars during primary pyrolysis of biomass with different conversion and the heat capacities of virgin biomass were determined.The ratio method was employed to measure the specific heat capacities of two biomass samples and their pyrolyzed chars through thermogravimetry and differential scanning calorimetry ( TG-DSC).A mathematical model was developed to calculate values of specific heat of chars.The results show that the specific heat capacitei s of the two biomass samples and their derived chars increase linearly within 60~200℃.The values oft he specific heat capacity fo the chars are lower than those fo the virgin biomass samples.The specific heat of chars decreases as the extent of pyrolysis increases.The calculated specific heat capacities from the developed mathematical model are quite close to those me asured by TG-DSC analyses eb twe n 150~200℃.