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Abstract

In order to study the effects of temperature and light on the characteristics of asphalt emissions, atmospheric pressure chemical ionization–time-of-flight mass spectrometer (APCI‑TOF MS) and electron impact ionization mass spectrometry (EI‑MS) were used to quantitatively characterize the composition information of PG 62-22 asphalt emissions at different temperatures (40–200 °C). The effects of different temperatures and light on total emission factor, SOA conversion factor, intermediate volatile organic compound (IVOC)/semi-volatile organic compound (SVOC) volume fraction, and aromatics volume fraction of asphalt emissions were studied. The results show that the components of asphalt emissions change with temperature, and the components are complex and varied, including anthracene, naphthalene, pyrene, fluoranthrene, and other harmful substances to the human body and environment. The emission factor and SOA conversion factor of asphalt increase with the increase in temperature. When the temperature is lower than 140 °C, the emission factor and SOA conversion factor of asphalt have strong temperature sensitivity. With the increase in temperature and light duration, the proportion of IVOC gradually decreases, and the proportion of SVOC gradually increases. The light causes the asphalt to release more PAHs.

Publication Date

7-14-2023

DOI

10.14048/j.issn.1671-2579.2023.03.033

First Page

212

Last Page

217

Submission Date

March 2025

Reference

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