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Title: On-road remote sensing of liquefied petroleum gas (LPG) vehicle emissions measurement and emission factors estimation
Authors: Ning, Z
Chan, TL 
Keywords: Emission factors
Liquefied petroleum gas
On-road vehicle emissions
Regression analysis
Remote sensing measurement technique
Issue Date: 2007
Publisher: Pergamon Press
Source: Atmospheric environment, 2007, v. 41, no. 39, p. 9099-9110 How to cite?
Journal: Atmospheric environment 
Abstract: In the present study, the real-world on-road liquefied petroleum gas (LPG) vehicle/taxi emissions of carbon monoxide (CO), hydrocarbon (HC) and nitric oxide (NO) were investigated. A regression analysis approach based on the measured LPG vehicle emission data was also used to estimate the on-road LPG vehicle emission factors of CO, HC and NO with respect to the effects of instantaneous vehicle speed and acceleration/deceleration profiles for local urban driving patterns. The results show that the LPG vehicle model years and driving patterns have a strong correlation to their emission factors. A unique correlation of LPG vehicle emission factors (i.e., g km-1 and g l-1) on different model years for urban driving patterns has been established. Finally, a comparison was made between the average LPG, and petrol [Chan, T.L., Ning, Z., Leung, C.W., Cheung, C.S., Hung, W.T., Dong, G., 2004. On-road remote sensing of petrol vehicle emissions measurement and emission factors estimation in Hong Kong. Atmospheric Environment 38, 2055-2066 and 3541] and diesel [Chan, T.L., Ning, Z., 2005. On-road remote sensing of diesel vehicle emissions measurement and emission factors estimation in Hong Kong. Atmospheric Environment 39, 6843-6856] vehicle emission factors. It has shown that the introduction of the replacement of diesel taxis to LPG taxis has alleviated effectively the urban street air pollution. However, it has demonstrated that proper maintenance on the aged LPG taxis should also be taken into consideration.
ISSN: 1352-2310
EISSN: 1873-2844
DOI: 10.1016/j.atmosenv.2007.08.006
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