Air-gasification has emerged as preferred means of converting biomass to valuable synthesis gas (syngas). In present work, the gasification characteristics of pine sawdust were studied in a small-scale fluidized bed using calcined dolomite as in-bed material. Dolomite is characterized by higher tar conversion and H₂ production during biomass gasification. Different operation conditions, equivalence ratios, reaction temperatures and dolomite contents, are studied for their influence on the gas compositions, gas yields, tar yields and higher heating values of producer gas. The results show that increasing either temperature or dolomite content enhances the tar conversion, where the latter accounts for the syngas with the lowest tar content. At 850 ^°C, the addition of 50 wt% dolomite can increase the gas yield from 1.48 to 1.85 Nm³/kg, and lowering the tar yield from 11.5 to 4.6 g/Nm³. Furthermore, the addition of more dolomite enhances the quality of the product gas, as indicated by increased values of the higher heating values of producer gas. Increasing the dolomite content within the 0–50% range resulted in higher H₂ and CO contents, whereas the CH₄ content declined. A slight change in CO₂ content was observed with increasing dolomite content, which might cause by the limited carbonation. In contrast, the H₂ content enhances non-linearly with the increase of dolomite content, which indicates that the catalytic activity of dolomite improves with the increase of dolomite share in the feedstock, due to the reforming of tar over dolomite. Increasing the ER from 0.14 to 0.3 elevates the gas yield, but decreases the tar yield and increases the H₂ content in the product gas.

空气气化已成为将生物质转化为有价值的合成气（合成气）的首选手段。在目前的工作中，以煅烧白云石为床内材料在小型流化床中研究了松木屑的气化特性。白云石的特征在于在生物质气化过程中更高的焦油转化率和H ₂产生。研究了不同的操作条件，当量比，反应温度和白云石含量对气体组成，气体收率，焦油收率和生产气较高的热值的影响。结果表明，提高温度或白云石含量均可提高焦油转化率，其中后者是焦油含量最低的合成气。在850  ^°C，添加50重量％的白云石可以将气体产率从1.48增加到1.85 Nm ³ / kg，并且将焦油产率从11.5降低到4.6 g / Nm ³。此外，更多的白云石的添加提高了产物气体的质量，如产生气体的较高热值的增加值所表明的。在0-50％范围内增加白云石含量会导致更高的H ₂和CO含量，而CH ₄含量会下降。随着白云石含量的增加，观察到CO ₂含量略有变化，这可能是由于有限的碳酸化作用所致。相反，H ₂含量随白云石含量的增加而非线性增加，这表明由于焦油比白云石重整，原料中白云石的催化活性随白云石含量的增加而提高。将ER从0.14增加到0.3可提高气体产率，但会降低焦油产率并增加产物气中的H ₂含量。