Gasification of pyrolysis chars from sewage sludge
Gasification of pyrolysis chars from sewage sludge
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DOI：
10.1016/j.fuel.2014.10.056
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发表时间：
2015-03
期刊：
影响因子：
7.4
通讯作者：
L. Nowicki;M. Markowski
中科院分区：
文献类型：
--
作者：
L. Nowicki;M. Markowski
采用热重-质谱联用技术研究了污泥半焦的气化特性。在不同温度和蒸汽浓度下进行了实验。需要700-900 °C的温度以在合理的时间内完成转化。采用三种气固反应速率模型来描述煤焦转化率对反应速率的影响。与收缩核反应控制模型和随机孔隙分布模型相比，简单的拟均相一级动力学被认为是最好的预测焦炭水蒸气气化速率。从实验数据估计的动力学参数是根据文献的木质纤维素焦气化，是第一个发表的污水污泥焦气化。
Gasification of char derived from sewage sludge was studied by using the TG–MS system. Experiments were carried out at different temperatures and steam concentrations. The temperatures of 700–900 °C were necessary to complete the conversion in reasonable time. Three reaction rate models for gas–solid reaction were applied to describe the effect of char conversion on the reaction rate. In comparison to the shrinking core model for reaction-controlled regime and random pore distribution models, simple pseudo-homogeneous first-order kinetics was found to be the best for predicting the rate of char steam gasification. Kinetic parameters estimated from the experimental data are in accordance with the literature for lignocellulosic char gasification and are the first ones published for sewage sludge char gasification.