生物质热解气部分氧化的数值模拟

Numerical Simulation of Biomass Pyrolysis Gas Reaction Under Partial Oxidation Environment

为研究生物质热解气在部分氧化条件下的反应特性,更好地预测气相产物的反应行为,建立一个管流反应区内的热解气部分氧化反应模型。选用苯酚,甲苯,苯,萘4种物质作为焦油模型化合物,小分子气体由CO、CO2、CH4、H2、N2和O2组成。搭建一个连续性实验台用以验证模型。结果显示,模型对于小分子气体的变化趋势能够较准确地预测,但定量预测仍存在一定的误差;对于焦油总量及变化趋势方面较为准确。与实验结果相比,该模型能够定性地反映生物质热解气部分氧化条件下的反应规律。

A numerical model was built to investigate the reaction property of biomass pyrolysis gas under partial oxidation environment. Phenol, toluene, benzene and naphthalene were selected as tar model compound. It is assumed that biomass pyrolysis gas consists of CO, CO2, CH4, H2, N2, O2 and model tar compounds. A continuous test rig was built in order to verify the model. Results show that, for small molecular gases, model could accurately predict their variation tendency, but the quantity is not accurate. For tar compounds, the prediction of trends and quantity are more accurate. Therefore, the proposed model could qualitatively reflect the partial oxidation of biomass pyrolysis reaction, and its quantitative agreement is also reasonable.