Bus technology meta-analysis

Hilda Martínez; Jorge Mac Ias Mora; Alper Unal

doi:10.3141/2158-05

Bus technology meta-analysis

Hilda Martínez, Jorge Mac Ias Mora, Alper Unal

Center for Sustainable Transportation-EMBARQ

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This paper analyzes data obtained from international studies that compared natural gas, diesel, and hybrid technologies for buses to determine differences in particulate matter (PM₁₀), nitrogen oxides (NO _x), nonmethane hydrocarbon (NMHC), carbon monoxide (CO), greenhouse gas, and air toxic emissions. The results presented here are for 90-passenger 12-m buses. Two types of comparisons were made: technology and fuel. The comparison revealed that buses using ultra-low-sulfur diesel (ULSD) with diesel particulate filters (DPF) and buses using compressed natural gas (CNG) with oxidation catalysts (OC) had the lowest emissions of PM₁₀ and CO; CNG with OC had lower NO_x and greenhouse gases emissions, while ULSD with DPF had lower NMHC emissions. Posttreatment technologies are presented as a low-cost option to reduce emissions. Hybrid diesel buses were found to be the technology that has the lowest emissions for most of the studied pollutants.

Original language	English
Pages (from-to)	36-43
Number of pages	8
Journal	Transportation Research Record
Issue number	2158
DOIs	https://doi.org/10.3141/2158-05
Publication status	Published - 12 Jan 2010
Externally published	Yes

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10.3141/2158-05

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abstract = "This paper analyzes data obtained from international studies that compared natural gas, diesel, and hybrid technologies for buses to determine differences in particulate matter (PM10), nitrogen oxides (NO x), nonmethane hydrocarbon (NMHC), carbon monoxide (CO), greenhouse gas, and air toxic emissions. The results presented here are for 90-passenger 12-m buses. Two types of comparisons were made: technology and fuel. The comparison revealed that buses using ultra-low-sulfur diesel (ULSD) with diesel particulate filters (DPF) and buses using compressed natural gas (CNG) with oxidation catalysts (OC) had the lowest emissions of PM10 and CO; CNG with OC had lower NOx and greenhouse gases emissions, while ULSD with DPF had lower NMHC emissions. Posttreatment technologies are presented as a low-cost option to reduce emissions. Hybrid diesel buses were found to be the technology that has the lowest emissions for most of the studied pollutants.",

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Bus technology meta-analysis

Abstract

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