摘要
将椰壳纤维在NaOH、KOH、ZnCl2和(NH4)2HPO4溶液中进行处理,并采用耐驰STA449C-Jupiter同步热分析仪研究了椰壳纤维在不同升温速率时的热分解反应。通过积分法对椰壳纤维的热解失重曲线进行动力学分析发现,升温速率为5K/min时热解的主反应阶段的活化能最低,低温段和高温段的分别为30.52kJ/mol、56.44kJ/mol,对椰壳纤维的热解反应最有利。采用5%的碱溶液浸泡处理可以有效除去椰壳纤维中的半纤维素、果胶等易降解的成分,改变热解反应过程,从而更有利于制备活性炭纤维。
Cconut fibers were treated with different chemical agents, such as NaOH, KOH, ZnC12, and （NH4）zHPO4 and thermal gravimetric analysis with STA449C Jupiter simultaneous thermal analyzer（NETZSCH, STA449C-Jupiter）. Integration method was used in kinetic calculation and analysis. The experiment results show that the lowest activation energy of the main pyrolysis reaction was obtained at the heating rate of 5K/rain, which was be- nefit to the pyrolysis reactions of coconut fiber. And the activation energy value at low temperature and high tempera- ture section were 30. 52k J/mol and 56.44kJ/mol, respectively. The hemicelluloses, pectin and other components degraded easily were removed when the coconut fiber immersed in 5% of the alkali solution, thus changing the coconut fiber pyrolysis reactions.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2011年第2期107-111,共5页
Materials Reports
基金
国家自然科学基金(50762003)
海南大学重点科研项目(hd09xm28)
关键词
椰壳纤维
热分解
动力学
coconut fibers, pyrolysis, kinetics
