SiO₂ Adsorption Aerogel Odor Dissipation Control Technology Based on Active Purification Technology

Liu, Zhaohui; Shu, Xin; Lin, Rui; Liu, Na; Luo, Ping · 2018 · DOAJ

DOI: 10.3303/CET1868075

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Summary

This study addresses the growing concern regarding in-vehicle air quality and odor, which are caused by toxic volatile organic compounds (VOCs) emitted from automotive decorative materials and external pollutants. Prolonged exposure to these substances can lead to health issues such as dizziness, chest distress, and immune system imbalance. The research aims to evaluate pollutant concentrations under various driving conditions and propose an odor dissipation control technology based on active purification using SiO₂ adsorption aerogel, leveraging its nano-porous structure for effective adsorption. The methodology involved monitoring Carbon Monoxide (CO), PM2.5, and Total Volatile Organic Compounds (TVOC) concentrations across three distinct road environments: congested urban sections (average speed ≤20 km/h), unobstructed suburban sections (~40 km/h), and highway sections (~80 km/h). Data were collected over 30-minute intervals with 30-second sampling points using handheld detectors. The study analyzed four ventilation modes: closed windows with no air conditioning, slightly open windows, external circulation air conditioning, and internal circulation air conditioning. Additionally, the paper outlines an Air Quality Index (AQI) method to grade air pollution and olfactory perception based on specific VOC concentrations. The results indicate that road congestion is the primary factor influencing CO concentration, with levels remaining significantly higher in congested sections regardless of ventilation mode. In contrast, PM2.5 concentrations inside the vehicle are predominantly determined by external air quality, with road conditions and ventilation modes having no decisive impact. TVOC concentrations remained relatively stable when windows were closed but were lower and showed a declining trend in unobstructed road conditions compared to congested ones. In highway environments, CO was largely undetectable, PM2.5 remained below standard values, and TVOC was rarely detected. The study concludes that SiO₂ adsorption aerogel, combined with active purification technologies, effectively controls and dissipates in-vehicle odors and pollutants. Gaseous pollutants like CO and TVOC can be removed through photocatalysis or physical adsorption by SiO₂ aerogel, while particulate matter like PM2.5 can be filtered using mechanical, electrostatic, or negative ion filtration methods. This approach offers a viable solution for improving in-car air quality and passenger comfort.

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