摘要
为考察离子液体对煤氧化反应动力学的影响,利用热分析实验所得放热速率结果计算了未处理煤和各种离子液体处理煤的平均活化能E和指前因子A。根据活化能随温度的变化趋势,分析发现:[AOEmim]BF4、[Amim]Cl、[Emim]AC 3种离子液体处理煤在低温段的化学反应速率比未处理煤快,其余离子液体处理煤的反应活性均降低。所用离子液体能够降低煤活化过程对温度的敏感性。[Bmim]OTf离子液体处理煤活化能较高,而且对温度的敏感度较低,活化过程较迟钝,因此推测[Bmim]OTf对煤的氧化反应动力起到一定的抑制作用。
In order to study the effect of ionic liquids on coal oxidation reaction dynamics, average activation E and pre - exponential factor A of the ionic liquids un - pretreated and pretreated coal was calculated by using the heat releasing rates based on thermal analysis experiments. According to the temperature change with the activation energy, the results show that the oxidation reaction activation of coal pretreated by [ AOEmim] BF4, [ Amim] C1, [ Emim] AC three kinds of ionic liquids is faster than the coal un - pretreated in low temperature stage, and the reaction activation of coal pretreated by other ionic liquids is low. The ionic liquids weankened the oxidation sensitivity of coal. [ Bmim] OTf has better suppressing effect for coal oxidation activation due to its high active energy and low sensitivity for temperature.
出处
《煤矿安全》
CAS
北大核心
2014年第5期148-150,154,共4页
Safety in Coal Mines
基金
国家自然科学青年基金资助项目(51304073
51304071)
河南省教育厅科学技术资助项目(12B440004
13A440324)
河南省科技厅基础与前沿研究资助项目(122300413210)
中国矿业大学国家重点实验室开放基金资助项目(12KF02)
关键词
离子液体
煤
反应活性
活化能
低温氧化
ionic liquid
coal
reaction activation
activation energy
low temperature oxidation
