Localised Evaporative Emission Inventory of Gasoline Vehicle Volatile Organic Compounds (VOCs) in China: Insights into Regional Variations and Driving Behaviours
1School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; Key Laboratory for Vehicle Emission Control and Simulation of Ministry of Ecology and Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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Summary
Evaporative emissions from gasoline vehicles in China are a major source of volatile organic compounds (VOCs). Targeting key provinces can significantly reduce these emissions, crucial for air pollution control.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
- Automotive Engineering
Background:
- Evaporative emissions from gasoline vehicles are a significant source of volatile organic compounds (VOCs) in China.
- These emissions contribute to air pollution and climate change.
Purpose of the Study:
- To develop a localized evaporative emission model for gasoline vehicles in China.
- To estimate current and future evaporative emissions and their influencing factors.
- To inform air pollution prevention and control strategies.
Main Methods:
- Developed a localized evaporative emission model incorporating fuel properties, vehicle characteristics, and usage patterns.
- Integrated data from American MOVES and European COPERT models with Chinese specific conditions.
- Created an emission inventory categorized by vehicle type, emission standard, process, and region.
- Estimated emission changes influenced by climate change and projected future trends.
Main Results:
- In 2020, China's gasoline vehicle evaporative emissions reached 517,000 tonnes, with diurnal and hot soak emissions accounting for 63%.
- Emissions are projected to rise to 602,000 tonnes by 2025 before decreasing to 408,000 tonnes by 2030.
- Significant regional and behavioral variations in emissions were observed, with high levels in Guangdong and other provinces.
- Focusing on 13 key provinces can control 66% of total national VOCs emissions.
Conclusions:
- Evaporative emissions from gasoline vehicles pose a substantial environmental challenge in China.
- Future emission control strategies must account for regional and behavioral differences.
- Targeted interventions in high-emission provinces are effective for comprehensive VOCs reduction.