CO2 and pollutant emissions from passenger cars in China

In this paper, CO2 and pollutant emissions of PCs in China from 2000 to 2005 were calculated based on a literature review and measured data. The future trends of PC emissions were also projected under three scenarios to explore the reduction potential of possible policy measures. Estimated baseline emissions of CO, HC, NOx, PM10 and CO2 were respectively 3.16×106, 5.14×105, 3.56×105, 0.83×104 and 9.14×107 tons for China’s PCs in 2005 with an uneven distribution among provinces. Under a no improvement (NI) scenario, PC emissions of CO, HC, NOx, PM10 and CO2 in 2020 are respectively estimated to be 4.5, 2.5, 2.5, 7.9 and 8.0 times that of 2005. However, emissions other than CO2 from PCs are estimated to decrease nearly 70% by 2020 compared to NI scenario mainly due to technological improvement linked to the vehicle emissions standards under a recent policy (RP) scenario. Fuel economy (FE) enhancement and the penetration of advanced propulsion/fuel systems could be co-benefit measures to control CO2 and pollutant emissions for the mid and long terms. Significant variations were found in PC emission inventories between different studies primarily due to uncertainties in activity levels and/or emission factors (EF).

► CO2 and air pollutant emissions were studied simultaneously for Chinese passenger cars.
► Comprehensive measures were applied to improve the accuracy of emission factors.
► Emissions of passenger cars from 2000 to 2020 were analyzed under various scenarios.
► The co-benefit of CO2 and pollutant reductions for passenger cars was analyzed.