Combustion emissions vehicle fuel

The properties of a fuel define its physical and chemical characteristics. A thorough understanding of the properties of a fuel is essential to the design and engineering of engine combustion systems, vehicle fuel systems, fuel storage, and fuel dispensing systems. Fuel properties impact vehicle performance, emissions, fuel efficiency, reliability, and durability. 

Natural sources of airborne nickel include soil dust, sea salt, volcanoes, forest fires, and vegetation exudates and account for about 16% of the atmospheric nickel burden (Kasprzak 1987 WHO 1991 Chau and Kulikovsky-Cordeiro 1995). Human sources of atmospheric nickel — which account for about 84% of all atmospheric nickel — include emissions from nickel ore mining, smelting, and refining activities combustion of fossil fuels for heating, power, and motor vehicles ... 

Fuel cells are currently being intensively developed as they have the potential to provide power in a relatively nonpolluting fashion. Legislation in the United States requires that a percentage of all new vehicles should emit no hydrocarbons or oxides of nitrogen (so-called zero emission vehicle. The current internal combustion engine cannot meet such stringent demands and so alternatives have to be found. The main contenders are electric cars which run on either batteries or fuel cells, or a combination of the two. Current developments now include not only fuel-cell-driven buses and cars, but also power sources for homes and factories. Micro-fuel cells for mobile phones and laptops have been developed. 

PAHs are formed as the by-products of incomplete combustion of fossil fuels. These compounds have been identified in many emission sources, such as vehicle exhausts power plants chemical, coke, and oil-shale industries and municipal sewage (Trapido et al., 1995). Some PAHs are known to be carcinogens. PAHs have been observed to be degraded by ozone treatment in aqueous media. The degradation kinetics of five PAHs — anthracene,... 

The electricity generated in a fuel cell can be used to power some vehicles instead of direct combustion of other fuels. El-vehicles are quiet, more effective and produce no emissions compared to fossil fuel-using vehicles. For sustainable... 

Incomplete combustion of organic material, forest fires and volcanic eruptions incomplete combustion of fossil fuels, coke oven emissions, aluminium smelters, vehicle exhausts 37, 4101,7... 

Appreciable interest has been generated in the use of activated carbons for flue gas cleanup, especially for the removal of SOx and NO the adsorption of mercury from flue gases was discussed earlier. From the environmental point of view, emissions from the combustion of fossil fuels in power plants and similar industrial processes are major contributors to a lowering of air quality. The flue ga.ses carry traces of SOi and NO, which can be oxidized and converted to their acid forms in the presence of atmospheric water vapor, and they may also combine with other volatile organics to form ozone and smog. Similarly, low level SOj and NOx emissions from automobiles, while insignificant for individual vehicles, become a large source of pollution when multiplied by the millions of vehicles that are on the roads. 

A recent paper by EIA (Energy Information Administration) within DOE (U.S. Department of Energy) indicates that CTL (coal-to-liquids) fuels, under the High Price B Case, could become a viable supplement to the petroleum liquids supply in U.S. by 2010 (1). CTL fuels made from the indirect liquefaction technology are free of sulfur and aromatics, and also have clean combustion properties. These fuels are compatible with the petroleum-based ultra-clean transportation fuels mandated by EPA (U.S. Environmental Protection Agency) for 2006 and beyond to help meet the new stringent specifications for vehicle emissions. The CTL fuels can be used either as a blending component or as neat fuel. 

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