Single-Bubble Dynamics in a Dense Phase Fluidized Sand Bed Biomass Gasification Environment,Industrial & Engineering Chemistry Research

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Single-Bubble Dynamics in a Dense Phase Fluidized Sand Bed Biomass Gasification Environment
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-24 , DOI: 10.1021/acs.iecr.9b05674
Nicolas Torres Brauer ₁ , Benito Serrano Rosales ₂ , Hugo de Lasa ₁

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Biomass gasification in fluidized beds is a process of important commercial value. The simulation of these fluidized bed units strongly depends on establishing bubble dynamics in dense phase sand fluidized beds. In these studies, the selected biomass pellet dimensions were 2.7 cm in length and 0.8 cm in diameter. To develop bubble dynamics studies in the present research, a combination of CREC-Optiprobes and a video micro-camera were employed. This was done to record bubble velocity and bubble dimensions in a 200–900 μm particle sand fluidized bed. The effects of biomass pellet concentration on the bubble rise velocity and bubble size and shape were evaluated at conditions close to minimum fluidization. On this basis, a theoretical bubble dynamic model was established. This phenomenologically based model included an adjustable bubble wake parameter, with model predictions providing the bubble chord, bubble frontal ratio, and bubble rising velocity.

中文翻译：

密相流化沙床生物质气化环境中的单气泡动力学

流化床中的生物质气化是具有重要商业价值的过程。这些流化床单元的模拟很大程度上取决于在密相砂流化床中建立气泡动力学。在这些研究中，选定的生物质颗粒尺寸为长2.7厘米，直径0.8厘米。为了开展本研究中的气泡动力学研究，采用了CREC-Optiprobes和视频微型相机的组合。这样做是为了记录200-900μm颗粒砂流化床中的气泡速度和气泡尺寸。在接近最小流化的条件下，评估了生物质颗粒浓度对气泡上升速度，气泡大小和形状的影响。在此基础上，建立了理论气泡动力学模型。

更新日期：2020-03-24

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