Experimental Investigation of Reactive Bubbly Flows - Influence of Boundary Layer Dynamics on Mass Transfer and Chemical Reactions
反应气泡流的实验研究 - 边界层动力学对传质和化学反应的影响
基本信息
- 批准号:256614085
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Priority Programmes
- 财政年份:2014
- 资助国家:德国
- 起止时间:2013-12-31 至 2020-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In chemical process engineering often a gaseous substance has to be mixed with a continuous liquid phase in order to perform a reaction with high yield and selectivity (e.g. oxidation or hydrogenation). For this purpose, the use of well-mixed bubble flows is preferred, in which the gaseous phase is dispersed in the liquid phase. The timescales of mixing are especially determined by the transport processes in the boundary layer close to the phase boundary and by the bubble swarm-turbulence. Tuning the transport timescales and the timescales of the chemical reactions can lead to a considerable potential for optimization of the actual yield and selectivity. Thus transport processes in the boundary layer and close to the interphase in bubble flows with a following chemical reaction are experimentally determined and subsequently modeled in the framework of this priority program. Especially the influence of dynamic interface deformation of the bubbles, due to shape dynamics (wobbling), the momentum exchange at the gas-liquid interface (swarm turbulence) and bubble collisions (bouncing) are taken into account. To accurately observe the local transport processes near the phase boundary Time Resolved Scanning - Laser Induced Fluorescence (TRS-LIF) and high-resolution Particle Image Velocimetry (PIV) are applied. In the second funding period, the newly developed chemical reaction systems will be used to enable the analysis, modeling and calculation of the yield and selectivity of consecutive-parallel reactions in bubble flows.
在化学过程工程中,为了进行高收率和选择性的反应(如氧化或氢化),通常气态物质必须与连续的液相混合。为此,优选使用混合良好的气泡流,其中气相分散在液相中。混合的时间尺度主要由靠近相边界的边界层输运过程和气泡群湍流决定。调整传递时间尺度和化学反应的时间尺度可以导致相当大的潜力,以优化实际产率和选择性。因此,通过实验确定了气泡流动中边界层和靠近界面的输运过程,并随后在该优先程序的框架内进行了建模。特别是气泡的动态界面变形的影响,由于形状动力学(摆动),动量交换在气液界面(群湍流)和气泡碰撞(弹跳)。采用时间分辨扫描-激光诱导荧光技术(TRS-LIF)和高分辨率粒子图像测速技术(PIV)精确观测相边界附近的局部输运过程。在第二个资助期,新开发的化学反应系统将用于分析、建模和计算气泡流中连续平行反应的产率和选择性。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr.-Ing. Michael Schlüter其他文献
Professor Dr.-Ing. Michael Schlüter的其他文献
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{{ truncateString('Professor Dr.-Ing. Michael Schlüter', 18)}}的其他基金
Aerosol Particles and their Dispersion - Scientific Network to Support Interdisciplinary Exchange in the DFG Focus Funding COVID-19
气溶胶颗粒及其分散 - 支持 DFG 重点资助 COVID-19 跨学科交流的科学网络
- 批准号:
495978244 - 财政年份:2021
- 资助金额:
-- - 项目类别:
Scientific Networks
Experimental investigation and modeling of local mass transfer rates in pure and contaminated Taylor flows
纯泰勒流和污染泰勒流中局部传质速率的实验研究和建模
- 批准号:
167159060 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Priority Programmes
Ortsaufgelöste experimentelle Analyse und Modellierung des Stoffübergangs an aufsteigenden Gasblasen mit und ohne überlagerter chemischer Reaktion
有或没有叠加化学反应的上升气泡中传质的空间分辨实验分析和建模
- 批准号:
28916454 - 财政年份:2006
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CHOLife+: Multiscale experimental analysis and simulation of lifelines in bioreactors to study their impact on the cultivation performance of Chinese Hamster Ovary (CHO) cells
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- 批准号:
427899833 - 财政年份:
- 资助金额:
-- - 项目类别:
Priority Programmes
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