电静分离器设计的计算分析,用于从室内空气中去除挥发性有机化合物
Osmo Anttalainen1, Elie Lattouf1, Paula Vanninen1
1VERIFIN, Finnish Institute for Verification of the Chemical Weapons Convention, Department of Chemistry, University of Helsinki, Helsinki, Finland.
Journal of the Air & Waste Management Association (1995)
|October 5, 2023
概括
这项研究使用计算建模来解释静电空气净化器的低效率. 它表明,不均的空气流和不良的混合限制了挥发性有机化合物 (VOC) 的去除.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 计算科学 计算科学
背景情况:
- 静电分离器提供了一种没有过器的方法来减少空气中的挥发性有机化合物 (VOC).
- 之前的研究探索了这种技术,但取得了有限的成功,报告了30-40%的移除效率.
- 一个单维模型需要不切实际的离子生产率来匹配实验数据.
研究的目的:
- 用先进的计算建模研究静电空气净化器的性能限制.
- 了解流动模式和离子分布如何影响VOC去除效率.
- 为了识别静电空气净化系统中的瓶.
主要方法:
- 采用了使用COMSOL的有限元素方法 (FEM) 模拟.
- 多物理模型结合了现实的离子生产率.
- 分析的重点是流动模式及其对电场内的离子分布的影响.
主要成果:
- 低去除效率是由于样品流量不均和VOC与反应物离子混合不完整而造成的.
- 与之前的单维模型相比,FEM模拟提供了更好的波器性能解释.
- 计算建模确定了流动动力学作为系统运行的关键因素.
结论:
- 流量模式和离子分布显著影响静电VOC去除的效率.
- 计算建模对于理解和优化空气净化系统设计至关重要.
- 这项工作提供了通过解决与流量相关的瓶来改善静电空气净化器性能的见解.
相关概念视频
Voltammetry: Stripping Methods
260
Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
260
Electrostatic Boundary Conditions in Dielectrics
1.2K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.2K
Electrostatic Boundary Conditions
491
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
491
Capillary Electrophoresis: Applications
418
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
418
Volatilization
407
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
407
Optimizing Chromatographic Separations
426
Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
426


