Impacts of methanol fuel on vehicular emissions: A review |
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Authors: | Chung Song Ho Jianfei Peng UnHyok Yun Qijun Zhang Hongjun Mao |
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Institution: | 1. Tianjin Key Laboratory of Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China2. High-Technology Development Institution, Kim II Sung University, Pyongyang 999093, Democratic People’s Republic of Korea3. Laboratory of Ship Research, Department of Ship & Marine Engineering, Kim Chaek University of Technology, Pyongyang 999093, Democratic People’s Republic of Korea |
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Abstract: | ● Methanol effectively reduces CO, HC, CO2, PM, and PN emissions of gasoline vehicles. ● Elemental composition of methanol directly affects the reduction of emissions. ● Several physicochemical properties of methanol help reduce vehicle emissions. The transport sector is a significant energy consumer and a major contributor to urban air pollution. At present, the substitution of cleaner fuel is one feasible way to deal with the growing energy demand and environmental pollution. Methanol has been recognized as a good alternative to gasoline due to its good combustion performance. In the past decades, many studies have investigated exhaust emissions using methanol-gasoline blends. However, the conclusions derived from different studies vary significantly, and the explanations for the effects of methanol blending on exhaust emissions are also inconsistent. This review summarizes the characteristics of CO, HC, NOx, CO2, and particulate emissions from methanol-gasoline blended fuels and pure methanol fuel. CO, HC, CO2, particle mass (PM), and particle number (PN) emissions decrease when methanol-blended fuel is used in place of gasoline fuel. NOx emission either decreases or increases depending on the test conditions, i.e., methanol content. Furthermore, this review synthesizes the mechanisms by which methanol-blended fuel influences pollutant emissions. This review provides insight into the pollutant emissions from methanol-blended fuel, which will aid policymakers in making energy strategy decisions that take urban air pollution, climate change, and energy security into account. |
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Keywords: | Methanol fuel Vehicular emission Emission reduction Cleaner fuel Gasoline substitute |
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