Abstract

In the present study, a stoichiometric thermodynamic equilibrium model has been introduced for downdraft biomass air gasifiers. Experimental data from five pilot scale downdraft gasifiers, that use different types of biomass fuels, are compared with the findings of the model. It is presented that the developed model is efficiently simulating H₂, CO, CH₄, and CO₂, volume fractions and the heating value of synthesis gas. The minimum error of comparisons has been found about 1% and the maximum error was obtained to be less than 25%. The level of sensitivity evaluation has been performed to the model to check out the effect of gasifier temperature, biomass moisture content, air to fuel ratio and equivalence ratio on the syngas form and lower heating value of syngas from the downdraft gasifier. The model results are compared with several existing experimental data of the literature. It is concluded that the findings of the study are a good candidate to model the downdraft gasifiers.

中文翻译：

---

向下气流生物质空气气化炉化学计量热力学平衡模型的数值模拟

摘要

在本研究中，已经引入了用于下沉式生物质空气气化炉的化学计量热力学平衡模型。将来自五个使用不同类型生物质燃料的中试规模下浮式气化炉的实验数据与该模型的发现进行了比较。结果表明，所开发的模型可以有效地模拟H ₂，CO，CH ₄和CO _2。，体积分数和合成气的热值。比较的最小误差约为1％，最大误差小于25％。已对该模型进行了敏感性评估，以检查气化炉温度，生物质水分含量，空燃比和当量比对来自下气化炉的合成气形式和较低合成气热值的影响。将模型结果与文献中现有的一些实验数据进行了比较。可以得出结论，该研究的结果是模拟下浮式气化炉的一个很好的候选者。