摘要
利用热重分析考察了负载不同钾含量的松木屑/低密度聚乙烯(WS/LDPE)共热解特征及热解动力学。结果表明,钾处理的WS/LDPE共热解行为与各组分单独热解时不同,失重率实验值与理论值差值(ΔW)达-24.2%。钾对WS/LDPE共热解有重要影响,随钾含量增加,共热解峰温(T P1)前移至较低温度区,同时焦产率升高。动力学分析表明,不同钾含量的WS/LDPE共热解可用三个独立一级反应(分解阶段)描述。第一阶段的活化能(E)和指前因子(A)随钾含量增加均升高,而第二阶段的E和A则下降,第三阶段的E和A变化无明显规律。
The co-pyrolytic characteristics and kinetics of pine wood sawdust(WS)and low density polyethylene(LDPE)mixtures with different potassium contents were investigated using thermo-gravimetric analysis.The results indicated that the co-pyrolytic characteristics of the potassium-treated WS/LDPE mixtures were different from the individual materials,and that the weight loss between the experimental values and the theoretical ones(ΔW)was up to-24.2%.The treatment of potassium has a great effect on the co-pyrolysis of WS/LDPE mixtures.The peak temperature(T P1)decreased but the char yield increased with increasing potassium contents.The kinetic analysis indicated that the co-pyrolytic process of the potassium-treated WS/LDPE could be described by three independent first-order reactions(decomposition stages).With increasing in potassium contents,the E and A values for WS/LDPE decomposition increased in the first stage but decreased in the second stage.These values do not show obvious change in the third stage.
作者
金解云
JIN Jie-yun(Yangtze River College,East China University of Technology,Fuzhou 344000,China)
出处
《东华理工大学学报（自然科学版）》
CAS
2020年第6期585-589,600,共6页
Journal of East China University of Technology(Natural Science)
基金
江西省教育厅科技项目(GJJ161583)。
关键词
钾催化
生物质
塑料
共热解
动力学
potassium catalysis
biomass
plastic
co-pyrolysis
kinetics
