Efficient management of renewable energy sources is crucial for sustainable economic development and reducing carbon footprint. The use of biomass agricultural residues through thermochemical conversion processes, such as gasification, offers a promising solution by producing eco-friendly fuels and chemicals. Biomass properties, type of gasifier and its operating conditions have important roles on the quality and characteristics of gasification products. Entrained flow gasifiers (EFR) and droptube furnaces (DTF) represent popular technologies that can operate at higher temperatures with various feedstock types. They are easy to scale up and commercially available. However, the released syngas may contain impurities like polycyclic aromatic hydrocarbons and soot, impacting the syngas cleaning system and equipment performance. Therefore, the understanding of biomass gasification at a laboratory scale is a preliminary step in evaluating its relevance for industrial applications, for which EFR and DTF can provide extremely useful information. The present manuscript reviews experimental works on biomass gasification in these types of reactors and discusses the effect of the operating conditions (temperature, gasifying agent, diameter, residence time and ash effect) in the current used approaches to identify the existent gaps, such as related to impurity release and handling. It was shown that the presence of ashes catalyzes the conversion of tars, inhibiting the formation of soot during biomass gasification. The retrieved information is anticipated to be useful for researchers, end users as well as energy planners.

中文翻译：

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工艺参数对生物质气化的影响：气流床反应器和落管炉实验研究综述


可再生能源的有效管理对于可持续经济发展和减少碳足迹至关重要。通过热化学转化过程（例如气化）使用生物质农业残留物，通过生产环保燃料和化学品提供了一种有前景的解决方案。生物质性质、气化炉类型及其操作条件对气化产品的质量和特性有重要影响。气流床气化炉 (EFR) 和落管炉 (DTF) 代表了可以在更高温度下使用各种原料类型运行的流行技术。它们很容易扩大规模并且可以商业化。然而，释放的合成气可能含有多环芳烃和烟灰等杂质，影响合成气净化系统和设备性能。因此，在实验室规模上了解生物质气化是评估其工业应用相关性的第一步，EFR 和 DTF 可以为此提供极其有用的信息。本手稿回顾了这些类型反应器中生物质气化的实验工作，并讨论了当前使用的方法中操作条​​件（温度、气化剂、直径、停留时间和灰分效应）的影响，以确定现有的差距，例如相关杂质释放和处理。结果表明，灰烬的存在会催化焦油的转化，抑制生物质气化过程中烟灰的形成。检索到的信息预计将对研究人员、最终用户以及能源规划者有用。