Kinetic model for noncatalytic supercritical water gasification of cellulose and lignin
Kinetic model for noncatalytic supercritical water gasification of cellulose and lignin
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DOI：
10.1002/aic.12165
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发表时间：
2010-09
期刊：
影响因子：
3.7
通讯作者：
F. L. Resende;P. Savage
中科院分区：
文献类型：
--
作者：
F. L. Resende;P. Savage
本文首次提出了超临界水气化反应的动力学模型，该模型描述了单个气体组分的形成和相互转化。该模型包括11个反应，它使用集总方案来处理大量的中间化合物。我们确定的速率常数在模型中的数值拟合它以前报道的纤维素和木质素的SCWG的实验数据。我们验证了该模型，表明它准确地预测在生物量负荷和水密度的参数估计中没有使用的气体产量。敏感性分析和反应速率分析表明，蒸汽重整和水煤气变换是超临界水煤气发生炉中H2的主要来源，CO、CO2和CN4的主要来源是中间产物。
This article reports the first kinetics model for Supercritical Water Gasification (SCWG) that describes the formation and interconversion of individual gaseous species. The model comprises 11 reactions, and it uses a lumping scheme to handle the large number of intermediate compounds. We determined numerical values for the rate constants in the model by fitting it to experimental data previously reported for SCWG of cellulose and lignin. We validated the model by showing that it accurately predicts gas yields at biomass loadings and water densities not used in the parameter estimation. Sensitivity analysis and reaction rate analysis indicate that steam-reforming and water―gas shift are the main sources of H 2 in SCWG, and intermediate species are the main sources of CO, CO 2 , and CN 4 .