Jiahao Zhang, Zhendong Zhu, Feihong Wang, Wenhui Feng, Hongyuan Wei and Leping Dang*,
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引用次数: 0
摘要
本文提出了一种无量纲经验参数,用于全面评估高粘度非牛顿表面活性剂流体的发泡特性。流变学测量用于探测材料的粘度、粘弹性和粘流活化能。此外,先进的聚焦光束反射测量(FBRM)在线表征技术与传统的显微镜观察相结合,用于定量检测发泡过程中气泡的产生、分布和不稳定性。这是首次使用 FBRM 技术对气泡分布进行在线定量分析。提出了三个无量纲参数来描述流体的发泡特性,即气体体积分数 Φ、气泡大小分布的分散系数 c 和 10 分钟跨度变化分数 Δs。这些属性分别代表了泡沫的生成性、分散性和稳定性。此外,还提出了一个无量纲参数--发泡特性指数(FPI),用于根据流体的内在特性对发泡行为进行整体评估。最后,在相同混合条件下进行的发泡实验结果表明,该指数可对发泡性能进行简单而可靠的估算,预计将有助于非牛顿流体发泡装置操作的工业设计。
Evaluating the Foaming Behavior of High-Viscosity Non-Newtonian Fluids
Here, a dimensionless empirical parameter is proposed to comprehensively evaluate the foaming properties of high-viscosity non-Newtonian surfactant fluids. Rheological measurements were used to probe the viscosity, viscoelasticity, and viscous flow activation energies of the materials. Additionally, an advanced Focused Beam Reflectance Measurement (FBRM) online characterization technique, in conjunction with traditional microscopic observations, was used to quantitatively examine the generation, distribution, and destabilization of bubbles during the foaming process. This is the first time that the FBRM technique has been used for online quantitative analysis of bubble distribution. Three dimensionless parameters were proposed to describe the foaming properties of the fluids, namely the volume fraction of gas, Φ, the coefficient of dispersion of the bubble size distribution, c, and the fraction of span change for 10 min, Δs. These properties represent the foam generativity, dispersibility, and stability, respectively. A dimensionless parameter, the foaming property index (FPI), is proposed to provide an overall evaluation of the foaming behavior based on the intrinsic properties of the fluid. Finally, the results of foaming experiments under the same mixing conditions demonstrated that the index provides a simple and reliable estimate of foaming performance, which is expected to aid in the industrial design of foaming unit operations for non-Newtonian fluids.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.