广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2012年
12期
118-120,164
,共4页
葛粉%热分解%非等温动力学%热重差热分析
葛粉%熱分解%非等溫動力學%熱重差熱分析
갈분%열분해%비등온동역학%열중차열분석
kudzu starch%thermal decomposition%non-isothermal kinetic%TG/DTA.
利用热重差热综合热分析仪(TG/DTA),在不同升温速率(5,10,15,20℃/min)下,采用Freeman-Carroll、Kissinger、Flynn-Wall-Ozawa和Friedman四种热分析方法,对葛粉的热行为及其热分解的动力学参数进行了研究。结果表明,葛粉的热行为包括自由水脱附(30~150℃)和分解(200~400℃)两个阶段,对应的失重率分别约为6%和70%。其热解反应的动力学方程为:dα/dt=1.424×1018[exp(-(193.70±8.97)×103/RT)](1-α)(2.28±0.04)。
利用熱重差熱綜閤熱分析儀(TG/DTA),在不同升溫速率(5,10,15,20℃/min)下,採用Freeman-Carroll、Kissinger、Flynn-Wall-Ozawa和Friedman四種熱分析方法,對葛粉的熱行為及其熱分解的動力學參數進行瞭研究。結果錶明,葛粉的熱行為包括自由水脫附(30~150℃)和分解(200~400℃)兩箇階段,對應的失重率分彆約為6%和70%。其熱解反應的動力學方程為:dα/dt=1.424×1018[exp(-(193.70±8.97)×103/RT)](1-α)(2.28±0.04)。
이용열중차열종합열분석의(TG/DTA),재불동승온속솔(5,10,15,20℃/min)하,채용Freeman-Carroll、Kissinger、Flynn-Wall-Ozawa화Friedman사충열분석방법,대갈분적열행위급기열분해적동역학삼수진행료연구。결과표명,갈분적열행위포괄자유수탈부(30~150℃)화분해(200~400℃)량개계단,대응적실중솔분별약위6%화70%。기열해반응적동역학방정위:dα/dt=1.424×1018[exp(-(193.70±8.97)×103/RT)](1-α)(2.28±0.04)。
The thermal behavior and kinetic parameters of the decomposition of kudzu starch in a temperature-programmed mode at different heating rate(5,10,15 and 20 ℃/min) were investigated based on Freeman-Carroll,Kissinger,Flynn-Wall-Ozawa and Friedman methods by TG/DTA.The results showed that kudzu starch contained desorption of free water which between 30~150 ℃ and decomposition process which between 200~400 ℃.Weight loss rates were 6% and 70%,respectively.The kinetic equation of thermol decomposition of kudzu starch was expressed as: dα/dt=1.424×1018[exp(-(193.70±8.97)×103/RT)](1-α)(2.28±0.04).