结合热稀释和热沸石的挥发性颗粒去除剂的设计和评价

IF 1.3 4区工程技术 Q4 CHEMISTRY, ANALYTICAL

Instrumentation Science & Technology Pub Date : 2023-01-09 DOI:10.1080/10739149.2023.2164933

Chengxiang Guo, Tongzhu Yu, Yixin Yang, Huaqiao Gui, Juntao Hu, Jianguo Liu

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引用次数: 0

摘要

摘要便携式高效去除机动车尾气中的挥发性颗粒物，对于车载排放测量系统中非挥发性固体颗粒物数量浓度的准确测量至关重要。为此，设计了一种结合了热稀释和热剥蚀器的挥发性颗粒去除器（称为VPR-TD）。利用COMSOL Multiphysics软件对VPR-TD的流场和温度场进行了模拟和分析，并进行了实验验证和系统性能测试。模拟表明，VPR-TD的有效加热长度和停留时间增加了6 cm和25%，当总流量为0.6时稀释比从1增加到10 350时的L/min °C。此外，实验结果表明，100 nm氯化钠（非挥发性颗粒）在VPR-TD中的去除率高于70.4% nm四碳烷（挥发性颗粒）在总流量0.6时高于99% L/min，加热温度350 °C，稀释比为5和10。总之，当稀释比设置为10时，该装置符合《轻型车辆排放限值和测量方法》（中国6）中挥发性颗粒物去除剂的要求。稀释比为5时，VPR-TD可作为便携式排放测量系统中的预调节装置。

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Design and evaluation of a volatile particle remover combining hot dilution and a thermodenuder

Abstract Portable and efficient removal of volatile particles from motor vehicle exhaust is essential for the accurate measurement of involatile solid particle number concentration in on-board emission measurement systems. For this purpose, a volatile particle remover with a combination of hot dilution and a thermodenuder (referred to as VPR-TD) was designed. The flow and temperature fields of the VPR-TD were simulated and analyzed by COMSOL Multiphysics software by which experimental verification and system performance tests were performed. The simulation showed that the effective heating length and residence time of the VPR-TD increased by 6 cm and 25%, respectively, as the dilution ratio increased from 1 to 10 at a total flow of 0.6 L/min at 350 °C. In addition, the experimental results showed that the penetration efficiency of 100 nm sodium chloride (non-volatile particles) in the VPR-TD was higher than 70.4%, and the removal efficiency of 30 nm tetracontane (volatile particles) was higher than 99% at a total flow 0.6 L/min, heating temperature 350 °C, and dilution ratios of 5 and 10. In summary, when the dilution ratio was set to 10, the device met the requirements of the Light Duty Vehicle Emission Limits and Measurement Methods (CHINA 6) for a volatile particle remover. At dilution ratio of 5, VPR-TD may be used as a pre-conditioning unit in portable emissions measurement systems.

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来源期刊

Instrumentation Science & Technology 工程技术-分析化学

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Instrumentation Science & Technology is an internationally acclaimed forum for fast publication of critical, peer reviewed manuscripts dealing with innovative instrument design and applications in chemistry, physics biotechnology and environmental science. Particular attention is given to state-of-the-art developments and their rapid communication to the scientific community. Emphasis is on modern instrumental concepts, though not exclusively, including detectors, sensors, data acquisition and processing, instrument control, chromatography, electrochemistry, spectroscopy of all types, electrophoresis, radiometry, relaxation methods, thermal analysis, physical property measurements, surface physics, membrane technology, microcomputer design, chip-based processes, and more. Readership includes everyone who uses instrumental techniques to conduct their research and development. They are chemists (organic, inorganic, physical, analytical, nuclear, quality control) biochemists, biotechnologists, engineers, and physicists in all of the instrumental disciplines mentioned above, in both the laboratory and chemical production environments. The journal is an important resource of instrument design and applications data.