CAJ | 학술논문

文中采用热重和差热分析法探究3种纸浆在不同加热速率下的燃烧性能。采用多种反应动力学机理和经典阿仑尼乌斯模型分析实验数据。通过对照不同反应级数(n =0.5,1,1.5,2)下的计算结果，发现当反应级数是1.5时，相关系数的线性最好。因此，采用1.5级反应模型分析加热速率和原料对纸浆反应过程的影响。研究发现，在纸浆燃烧的过程中，有2个主要的质量损失和热量增加的阶段：纸浆主要成分的热降解阶段（例如：纤维素、半纤维素和木质素）和耐热产物的热分解阶段（例如：焦炭或者积炭）。通过比较不同纸浆的 TG 和 DTA曲线，发现在纸浆燃烧的过程中，随着加热速率的增加，热解峰的温度和热量呈现增加的趋势。而且活化能和之前因子也随着加热速率的增加而增加。在相同实验条件下，在3种纸浆中，棉浆的热解峰具有最高的温度和热量。因此在棉浆燃烧的过程中，需要提供更多的能量。总而言之，在3种纸浆中，棉浆具有最好的热解稳定性。
문중채용열중화차열분석법탐구3충지장재불동가열속솔하적연소성능。채용다충반응동역학궤리화경전아륜니오사모형분석실험수거。통과대조불동반응급수(n =0.5,1,1.5,2)하적계산결과，발현당반응급수시1.5시，상관계수적선성최호。인차，채용1.5급반응모형분석가열속솔화원료대지장반응과정적영향。연구발현，재지장연소적과정중，유2개주요적질량손실화열량증가적계단：지장주요성분적열강해계단（례여：섬유소、반섬유소화목질소）화내열산물적열분해계단（례여：초탄혹자적탄）。통과비교불동지장적 TG 화 DTA곡선，발현재지장연소적과정중，수착가열속솔적증가，열해봉적온도화열량정현증가적추세。이차활화능화지전인자야수착가열속솔적증가이증가。재상동실험조건하，재3충지장중，면장적열해봉구유최고적온도화열량。인차재면장연소적과정중，수요제공경다적능량。총이언지，재3충지장중，면장구유최호적열해은정성。
In this article, thermogravimetry (TG) and differential thermal analysis (DTA) were applied to investigate the combustion behavior of three types of pulps at different heating rates (5, 10, 15°C?min-1). Various reaction kinetic mechanisms and classical Arrhenius models were applied to analyze the experiment data. By comparing the correlation coefficient under different reaction orders (n = 0.5, 1, 1.5, 2), we found that the correlation coefficient was best when the reaction order was 1.5. Therefore, the 1.5th-order reaction model was adopted to analyze the effects of heating rate and raw material on pulps reaction process. During pulps combustion process, there were two main mass loss stages and two heat increase stages: thermal degradation stage of major constituents (i.e., cellulose, hemicellulose and lignin) of pulps and the thermal decomposition stage of heat-resistant products (i.e., char or fixed carbon). By comparing the TG and DTA curves for different pulps, we found that the temperatures and heat of peaks increased as the heating rate increasing, during the combustion process. And the apparent energy (E) and pre-exponential factor (A) increased as the increasing of heating rate. At the same reaction condition, the cotton pulp had the highest temperatures and heat of peaks among three pulps. Therefore, more energy need to be provided during the combustion process. In one word, it had the best thermal stability among three pulps.