Characterization of the gas releasing behaviors of catalytic pyrolysis of rice husk using potassium over a micro-fluidized bed reactor
Characterization of the gas releasing behaviors of catalytic pyrolysis of rice husk using potassium over a micro-fluidized bed reactor
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微流化床反应器上钾催化热解稻壳气体释放行为的表征
DOI：
10.1016/j.enconman.2017.01.038
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发表时间：
2017-03
影响因子：
10.4
通讯作者：
Chang Jiafu
中科院分区：
文献类型：
--
作者：
Liu Yuan;Wang Yan;Guo Feiqiang;Li Xiaolei;Li Tiantao;Guo Chenglong;Chang Jiafu
在两段式微流化床反应器中，研究了钾对稻壳高温热解气体释放行为的影响。基于Friedman方法和模型拟合方法研究了H2、CO、CO2和CH 4的生成反应动力学。结果表明，不同的气体种类具有不同的开始和结束气体释放过程的时间，特别是在600 °C下，代表了用于产生这些气体组分的不同化学途径和机制。随着钾浓度从0增加到0.5 mol/kg，H2、CO和CO2的表观活化能分别从23.10 kJ/mol降低到12.00 kJ/mol、15.48 kJ/mol降低到14.03 kJ/mol和10.14 kJ/mol降低到7.61 kJ/mol，而CH 4的表观活化能从16.85 kJ/mol增加到19.40 kJ/mol。结果表明，钾的加入促进了H2、CO和CO2的生成反应，而阻碍了CH 4的生成反应。进一步发现所有样品的热解反应均服从三维扩散模型。
Influence of potassium on the gas releasing behaviors during rice husk high-temperature pyrolysis was investigated under isothermal conditions in a two stage micro-fluidized bed reactor. Reaction kinetics for generating H2, CO, CO2and CH4was investigated based on the Friedman and model-fitting approaches. Results indicated that different gas species had different times to start and end the gas release process, particularly at 600 °C, representing different chemical routes and mechanics for generating these gas components. The resulting apparent activation energies for H2, CO, and CO2decreased from 23.10 to 12.00 kJ/mol, 15.48 to 14.03 kJ/mol and 10.14 to 7.61 kJ/mol respectively with an increase in potassium concentration from 0 to 0.5 mol/kg, while that for CH4increased from 16.85 to 19.40 kJ/mol. The results indicated that the addition of potassium could promote the generation reactions of H2, CO and CO2while hinder the generation reactions of CH4. The pyrolysis reaction was further found to be subject to the three-dimensional diffusion model for all the samples.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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影响因子：
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