铁法煤催化燃烧与分布活化能模型动力学研究  

CATALYTIC COMBUSTION EFFECTS AND DISTRIBUTED ACTIVATION ENERGY MODED OF TF COAL

作　　者：朱川[1] 姜英[2] 

机构地区：[1]煤炭科学研究总院北京煤化工研究分院,北京工程师100013 [2]煤炭科学研究总院,煤碳资源高效开采与洁净利用国家重点实验室,北京研究员100013

出　　处：《煤炭转化》2013年第3期42-47,共6页Coal Conversion

基　　金：国家质检总局公益基金资助项目(201210227)

摘　　要：选取着火温度、燃尽率和残灰碳氢含量等指标,利用程序升温热重技术研究了CuSO4和K2CO3对铁法高灰烟煤(TF)的催化助燃效果,同时通过分布活化能(DAEM)动力学模型探讨了活化能变化与催化助燃效果的关系.结果表明,CuSO4和K2CO3的添加比例均为2%时,TF煤的着火温度分别降低了44.3℃和31.1℃;最终燃尽率从92.19%分别提高到94.75%和96.13%,而残灰含碳量从6.91%分别降到3.37%和2.39%.TF煤燃烧的分布活化能在转化率<15%,20%～85%,>90%三阶段呈现不同的规律性变化,CuSO4和K2CO3对TF煤燃烧的分布活化能影响主要发生在转化率20%～85%之间:CuSO4的添加使得TF煤燃烧的分布活化能呈现波动性变化,而K2CO3能够明显降低TF煤燃烧的分布活化能.Based on the indices of ignition temperature, burnout in isothermal area and carbon and hydrogen in residual ash, catalytic effects of CuSO4 and K2 CO3 on TF coal combustion were investigated with a temperature programmed method by a thermal-gravimetric analysis. On the other hand, the relationship of activation energy and catalytic effects was also discussed with a distributed activation energy model（DAEM）. The results showed that with 2% CuSO4 and 2% K2CO3, the ignition temperature of TF coal was lowered by 44.3 ℃ and 31.1℃ respectively; when the final burnout increased from 92.19% to 94.75% and 96.13%, the carbon in residual ash decreased from 6.91% to 3.37% and 2.39% respectively. The distributed activation energy of TF coal combustion showed different on the three stages of conversion： 〈15%, 20%-85% and 〉90%. The effect of CuSO4 and K2CO3 on energy change during the conversion of 20%-85% was. K2 CO3 could lower the energy obviously, and E of TF coal with CuSO4 showed a fluctuation change.

关 键 词：着火温度 燃尽率 催化燃烧 分布活化能 

分 类 号：TQ534[化学工程—煤化学工程] O643.1[理学—物理化学]