Modeling CFB biomass pyrolysis reactors
Modeling CFB biomass pyrolysis reactors
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DOI：
10.1016/j.biombioe.2007.08.001
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发表时间：
2008-02
影响因子：
6
通讯作者：
M. V. D. Velden;J. Baeyens;I. Boukis
中科院分区：
文献类型：
--
作者：
M. V. D. Velden;J. Baeyens;I. Boukis
流化床快速热解生物质被认为是具有很高的商业潜力的生物质热处理。本文主要介绍了一个模型的进一步发展，以提高对科学的理解，并能够预测热解产率，是令人满意的协议与文献数据。通过大量的热重分析和差示扫描量热实验，对生物质热解动力学和吸热性进行了综述。对于大多数生物质物种，反应速率常数>0.5s-1，对应于快速反应，因此可以满足高转化率的短反应时间的要求。实验室规模的间歇实验和中试规模的CFB实验表明，在510±10°C的操作温度下可以实现60至70wt%的油收率，与文献数据一致。热解的基本原理是开发的模型的基础上，应用于预测的过程操作变量的函数的不同产品的收率。的预测是在公平的协议与我们自己的转换实验和文献数据。最后，所有的研究结果都被使用，并说明了生物质热解的循环流化床的设计策略。
Fluidized bed-fast pyrolysis of biomass is considered as having a high commercial potential for the thermal treatment of biomass. This paper mainly presents a model developed further to improvements in the understanding of the science, and capable of predicting pyrolysis yields that are in satisfactory agreement with literature data. The kinetics and endothermicity of biomass pyrolysis are reviewed from extensive TGA and differential scanning calorimetry experiments. For most biomass species, the reaction rate constant is >0.5s−1, corresponding to a fast reaction, so the requirement of a short reaction time for a high conversion can be met. Lab-scale batch experiments and pilot-scale CFB experiments show that an oil yield between 60 and 70wt% can be achieved at an operating temperature of 510±10°C, in line with literature data. Pyrolysis fundamentals are the basis of the developed model, applied to predict the yields of the different products as functions of process operation variables. The predictions are in fair agreement with our own conversion experiments and literature data. Finally, all findings are used and are illustrated in the design strategy of a CFB for the pyrolysis of biomass.