Development of Technology for Separation and Enrichment of Nano-Aerosol Particles

纳米气溶胶颗粒分离富集技术进展

基本信息

批准号：
15560651
负责人：
FURUUCHI Masami
金额：
$ 2.37万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

1)Determination of optimal geometry of supersonic virtual impactor as a nano-particle separator and concentrator : A supersonic dichotomous sampler with a Laval nozzle was numerically investigated into its performance either as a separator or a shape of nozzle cross-section (rectangular and circular), clearance between nozzle exit and particle collection probe inlet, and probe geometry on the separation characteristics were simulatively investigated. The effect of sheath flow along the nozzle wall and center on the separation characteristics and the particle wall loss were also analyzed. The supersonic dichotomous sampler was designed to make the flow as similar to the stagnation flow, which provided a distinct standing shock wave between the nozzle exit and the collection probe inlet. The smaller distance from the collection probe inlet to the standing shock wave was related to the cutoff size of particle. The sheath air flow improved the separation sharpness and reduced the particle … More wall loss.2)Devising of equipment and investigation into performance : The devise designed as the result of the investigation 1) was equipped and the separation performance and behavior of gaseous PAHs were investigated using the ambient air. Influence of humidity was shown to be significant for gaseous PAHs compounds with higher water solubility.3)Improvements of nano-particle separator and concentrator : The devise was modified and improved based on the results 2). The nozzle geometry and probe geometry were adjusted.4)Summary : According to obtained results, the guideline for the design of supersonic impactor was proposed. The cutoff size of the rectangular nozzle is 200-300nm under the ambient pressure condition while the circular nozzle has 50-80nm of the minimal cutoff size. Gaseous PAH compounds and organic carbon was shown to be effectively collected in the downstream of supersonic flow due to the highly saturated condition. The water vapor was condensed in the supersonic flow and gaseous PAH compounds such as Nap, Ace, Phe, which have higher water solubility were collected on the water droplet. Combining the deposition or condensation of gaseous compounds in the supersaturated condition and deposition to water droplets, the gaseous compounds can be effectively collected using the preset technique. Less

1）确定超音速虚拟撞击器作为纳米颗粒分离器和浓缩液的最佳几何形状：带有LAVAL喷嘴的超音速二分法样品基本上研究了其作为分离器的性能，无论是分离器还是喷嘴横截面的形状，无论是在底部和圆形）的形状（均方体和圆形），在notuke pocteration和粒子收集的特征上，以及对概览的特征进行了分离，并在概率上进行了概括，并在概率上进行了概括。还分析了沿喷嘴壁和中心鞘流对分离特性和颗粒壁损失的影响。超音速二分法采样器的设计是使流量与停滞流量相似，后者在喷嘴出口和收集探针入口之间提供了明显的直立冲击波。从收集探针入口到静电冲击波的较小距离与粒子的截止大小有关。鞘的空气流改善了分离的清晰度并减少了颗粒……更多的墙壁损失。2）将设备和投资纳入性能：设计为投资的结果1）配备了设计，并使用环境空气研究了气态PAH的分离性能和行为。湿度的影响显示对于具有较高水溶性的气态PAHS化合物具有重要意义。3）纳米粒子分离剂和浓缩物的改善：根据结果2对设计和改进进行了改进。调整了喷嘴几何形状和探针几何形状。4）摘要：根据获得的结果，提出了超音速撞击器设计指南。在环境压力条件下，矩形喷嘴的截止尺寸为200-300nm，而圆形喷嘴具有最小截止尺寸的50-80nm。由于高度饱和的条件，气态PAH化合物和有机碳被有效地收集在超音速流的下游。将水蒸气凝结在超音速流中，气体PAH化合物（例如NAP，ACE，PHE）在水滴上收集了较高的水溶性。将气态化合物的沉积或缩合在过饱和条件下并沉积到水滴中，可以使用预设技术有效地收集气态化合物。较少的

项目成果

期刊论文数量（34）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Characterization and Modeling Filtration in a Granular Coke Bed

粒状焦床过滤的表征和建模

DOI：
发表时间：
2004
期刊：
Ceramic Transactions "Characterization & Control of Interfaces for High Quality Advanced Materials" 146
影响因子：
0
作者：
M.Furuuchi;M.Hata;C.Kanaoka;R.Takahashi;J.Yagi;R.Takehama;Y.Kawaminami
通讯作者：
Y.Kawaminami

古内正美, 清水良保, 金岡千嘉男: "超音速バーチャルインパクターの微粒子分離特性に及ぼす装置形状の影響"化学工学会第69年会講演予定. (2004)

Masami Furuuchi、Yoshiyasu Shimizu、Chiyao Kanaoka：“装置形状对超音速虚拟冲击器颗粒分离特性的影响” 预定在日本化学工程师学会第 69 届年会上发表（2004 年）。