This work concerns the study of the combustion kinetic characteristics of chars made from three different biomass species, vine and kiwi pruning wastes, and gorse from forest cleaning process in a fluidized bed combustor, operating in the bubbling bed regime, at four bed temperatures, 750, 820, 850 and 920 °C. Batches of the original biomass pellets were carbonized in a nitrogen fluidized bed, either at 900 °C, for the kiwi and vine pellets, or at 800 °C for the gorse pellets. To acquire complete information on the combustion behaviour, different sizes of the char particles were subsequently burned in a bubbling fluidized bed. The evolution of the overall combustion resistance, and information on the combustion control were obtained. It was observed that for the kiwi and vine chars, the combustion was controlled through a combination of diffusion and kinetics, while for the gorse char the combustion was diffusionally controlled. In addition, the pre-exponential factors and activation energies were obtained for the kiwi and vine chars, by applying the Arrhenius law to the kinetic data for each char. Activation energy values of 246.16 kJ/mol for the kiwi char and of 155.02 kJ/mol for the vine char were obtained.

Graphic Abstract

中文翻译：

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加利西亚-北葡萄牙欧元区某些农业废弃物燃烧动力学数据的确定

这项工作涉及在流化床燃烧器中，在四个床温750的条件下，对由三种不同生物质，藤蔓和猕猴桃修剪废物以及森林清洁过程中的苔藓制成的焦炭在流化床燃烧器中燃烧动力学特性的研究。 ，820、850和920°C。将原始生物质颗粒的批次在氮气流化床中碳化，对于猕猴桃和藤蔓颗粒而言，在900°C下，对于丁香颗粒而言，则在800°C下进行。为了获得有关燃烧行为的完整信息，不同大小的炭颗粒随后在鼓泡的流化床中燃烧。获得了总燃烧阻力的演变，以及有关燃烧控制的信息。据观察，对于猕猴桃和藤炭，燃烧是通过扩散和动力学相结合来控制的，而对于焦糖，燃烧是通过扩散来控制的。此外，通过将阿伦尼乌斯定律应用于每种炭的动力学数据，获得了奇异果和藤炭的预指数因子和活化能。猕猴桃炭的活化能值为246.16 kJ / mol，藤蔓炭的活化能值为155.02 kJ / mol。

图形摘要